| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkTypes.h" // Keep this before any #ifdef ... |
| #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) |
| |
| #ifdef SK_BUILD_FOR_MAC |
| #import <ApplicationServices/ApplicationServices.h> |
| #endif |
| |
| #ifdef SK_BUILD_FOR_IOS |
| #include <CoreText/CoreText.h> |
| #include <CoreText/CTFontManager.h> |
| #include <CoreGraphics/CoreGraphics.h> |
| #include <CoreFoundation/CoreFoundation.h> |
| #endif |
| |
| #include "mac/SkUniqueCFRef.h" |
| #include "SkAdvancedTypefaceMetrics.h" |
| #include "SkAutoMalloc.h" |
| #include "SkCGUtils.h" |
| #include "SkColorData.h" |
| #include "SkDescriptor.h" |
| #include "SkEndian.h" |
| #include "SkFloatingPoint.h" |
| #include "SkFontDescriptor.h" |
| #include "SkFontMetrics.h" |
| #include "SkFontMgr.h" |
| #include "SkGlyph.h" |
| #include "SkMakeUnique.h" |
| #include "SkMaskGamma.h" |
| #include "SkMathPriv.h" |
| #include "SkMutex.h" |
| #include "SkOTTable_OS_2.h" |
| #include "SkOTUtils.h" |
| #include "SkOnce.h" |
| #include "SkPaint.h" |
| #include "SkPath.h" |
| #include "SkSFNTHeader.h" |
| #include "SkStream.h" |
| #include "SkString.h" |
| #include "SkTemplates.h" |
| #include "SkTo.h" |
| #include "SkTypefaceCache.h" |
| #include "SkTypeface_mac.h" |
| #include "SkUTF.h" |
| #include "SkUtils.h" |
| |
| #include <dlfcn.h> |
| |
| #include <utility> |
| |
| // Experimental code to use a global lock whenever we access CG, to see if this reduces |
| // crashes in Chrome |
| #define USE_GLOBAL_MUTEX_FOR_CG_ACCESS |
| |
| #ifdef USE_GLOBAL_MUTEX_FOR_CG_ACCESS |
| SK_DECLARE_STATIC_MUTEX(gCGMutex); |
| #define AUTO_CG_LOCK() SkAutoMutexAcquire amc(gCGMutex) |
| #else |
| #define AUTO_CG_LOCK() |
| #endif |
| |
| // Set to make glyph bounding boxes visible. |
| #define SK_SHOW_TEXT_BLIT_COVERAGE 0 |
| |
| CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face) { |
| return face ? (CTFontRef)face->internal_private_getCTFontRef() : nullptr; |
| } |
| |
| class SkScalerContext_Mac; |
| |
| static SkUniqueCFRef<CFStringRef> make_CFString(const char s[]) { |
| return SkUniqueCFRef<CFStringRef>(CFStringCreateWithCString(nullptr, s, kCFStringEncodingUTF8)); |
| } |
| |
| // inline versions of these rect helpers |
| |
| static bool CGRectIsEmpty_inline(const CGRect& rect) { |
| return rect.size.width <= 0 || rect.size.height <= 0; |
| } |
| |
| static CGFloat CGRectGetMinX_inline(const CGRect& rect) { |
| return rect.origin.x; |
| } |
| |
| static CGFloat CGRectGetMaxX_inline(const CGRect& rect) { |
| return rect.origin.x + rect.size.width; |
| } |
| |
| static CGFloat CGRectGetMinY_inline(const CGRect& rect) { |
| return rect.origin.y; |
| } |
| |
| static CGFloat CGRectGetMaxY_inline(const CGRect& rect) { |
| return rect.origin.y + rect.size.height; |
| } |
| |
| static CGFloat CGRectGetWidth_inline(const CGRect& rect) { |
| return rect.size.width; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static void sk_memset_rect32(uint32_t* ptr, uint32_t value, |
| int width, int height, size_t rowBytes) { |
| SkASSERT(width); |
| SkASSERT(width * sizeof(uint32_t) <= rowBytes); |
| |
| if (width >= 32) { |
| while (height) { |
| sk_memset32(ptr, value, width); |
| ptr = (uint32_t*)((char*)ptr + rowBytes); |
| height -= 1; |
| } |
| return; |
| } |
| |
| rowBytes -= width * sizeof(uint32_t); |
| |
| if (width >= 8) { |
| while (height) { |
| int w = width; |
| do { |
| *ptr++ = value; *ptr++ = value; |
| *ptr++ = value; *ptr++ = value; |
| *ptr++ = value; *ptr++ = value; |
| *ptr++ = value; *ptr++ = value; |
| w -= 8; |
| } while (w >= 8); |
| while (--w >= 0) { |
| *ptr++ = value; |
| } |
| ptr = (uint32_t*)((char*)ptr + rowBytes); |
| height -= 1; |
| } |
| } else { |
| while (height) { |
| int w = width; |
| do { |
| *ptr++ = value; |
| } while (--w > 0); |
| ptr = (uint32_t*)((char*)ptr + rowBytes); |
| height -= 1; |
| } |
| } |
| } |
| |
| typedef uint32_t CGRGBPixel; |
| |
| static unsigned CGRGBPixel_getAlpha(CGRGBPixel pixel) { |
| return pixel & 0xFF; |
| } |
| |
| static CGFloat ScalarToCG(SkScalar scalar) { |
| if (sizeof(CGFloat) == sizeof(float)) { |
| return SkScalarToFloat(scalar); |
| } else { |
| SkASSERT(sizeof(CGFloat) == sizeof(double)); |
| return (CGFloat) SkScalarToDouble(scalar); |
| } |
| } |
| |
| static SkScalar CGToScalar(CGFloat cgFloat) { |
| if (sizeof(CGFloat) == sizeof(float)) { |
| return SkFloatToScalar(cgFloat); |
| } else { |
| SkASSERT(sizeof(CGFloat) == sizeof(double)); |
| return SkDoubleToScalar(cgFloat); |
| } |
| } |
| |
| static float CGToFloat(CGFloat cgFloat) { |
| if (sizeof(CGFloat) == sizeof(float)) { |
| return cgFloat; |
| } else { |
| SkASSERT(sizeof(CGFloat) == sizeof(double)); |
| return static_cast<float>(cgFloat); |
| } |
| } |
| |
| static CGAffineTransform MatrixToCGAffineTransform(const SkMatrix& matrix) { |
| return CGAffineTransformMake( ScalarToCG(matrix[SkMatrix::kMScaleX]), |
| -ScalarToCG(matrix[SkMatrix::kMSkewY] ), |
| -ScalarToCG(matrix[SkMatrix::kMSkewX] ), |
| ScalarToCG(matrix[SkMatrix::kMScaleY]), |
| ScalarToCG(matrix[SkMatrix::kMTransX]), |
| ScalarToCG(matrix[SkMatrix::kMTransY])); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #define BITMAP_INFO_RGB (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host) |
| |
| /** Drawn in FontForge, reduced with fonttools ttx, converted by xxd -i, |
| * this TrueType font contains a glyph of the spider. |
| * |
| * To re-forge the original bytes of the TrueType font file, |
| * remove all ',|( +0x)' from this definition, |
| * copy the data to the clipboard, |
| * run 'pbpaste | xxd -p -r - spider.ttf'. |
| */ |
| static constexpr const uint8_t kSpiderSymbol_ttf[] = { |
| 0x00, 0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x80, 0x00, 0x03, 0x00, 0x40, |
| 0x47, 0x44, 0x45, 0x46, 0x00, 0x14, 0x00, 0x14, 0x00, 0x00, 0x07, 0xa8, |
| 0x00, 0x00, 0x00, 0x18, 0x4f, 0x53, 0x2f, 0x32, 0x8a, 0xf4, 0xfb, 0xdb, |
| 0x00, 0x00, 0x01, 0x48, 0x00, 0x00, 0x00, 0x60, 0x63, 0x6d, 0x61, 0x70, |
| 0xe0, 0x7f, 0x10, 0x7e, 0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x54, |
| 0x67, 0x61, 0x73, 0x70, 0xff, 0xff, 0x00, 0x03, 0x00, 0x00, 0x07, 0xa0, |
| 0x00, 0x00, 0x00, 0x08, 0x67, 0x6c, 0x79, 0x66, 0x97, 0x0b, 0x6a, 0xf6, |
| 0x00, 0x00, 0x02, 0x18, 0x00, 0x00, 0x03, 0x40, 0x68, 0x65, 0x61, 0x64, |
| 0x0f, 0xa2, 0x24, 0x1a, 0x00, 0x00, 0x00, 0xcc, 0x00, 0x00, 0x00, 0x36, |
| 0x68, 0x68, 0x65, 0x61, 0x0e, 0xd3, 0x07, 0x3f, 0x00, 0x00, 0x01, 0x04, |
| 0x00, 0x00, 0x00, 0x24, 0x68, 0x6d, 0x74, 0x78, 0x10, 0x03, 0x00, 0x44, |
| 0x00, 0x00, 0x01, 0xa8, 0x00, 0x00, 0x00, 0x0e, 0x6c, 0x6f, 0x63, 0x61, |
| 0x01, 0xb4, 0x00, 0x28, 0x00, 0x00, 0x02, 0x0c, 0x00, 0x00, 0x00, 0x0a, |
| 0x6d, 0x61, 0x78, 0x70, 0x00, 0x4a, 0x01, 0x4d, 0x00, 0x00, 0x01, 0x28, |
| 0x00, 0x00, 0x00, 0x20, 0x6e, 0x61, 0x6d, 0x65, 0xc3, 0xe5, 0x39, 0xd4, |
| 0x00, 0x00, 0x05, 0x58, 0x00, 0x00, 0x02, 0x28, 0x70, 0x6f, 0x73, 0x74, |
| 0xff, 0x03, 0x00, 0x67, 0x00, 0x00, 0x07, 0x80, 0x00, 0x00, 0x00, 0x20, |
| 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x0b, 0x0f, 0x08, 0x1d, |
| 0x5f, 0x0f, 0x3c, 0xf5, 0x00, 0x0b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0xd1, 0x97, 0xa8, 0x5a, 0x00, 0x00, 0x00, 0x00, 0xd6, 0xe8, 0x32, 0x33, |
| 0x00, 0x03, 0xff, 0x3b, 0x08, 0x00, 0x05, 0x55, 0x00, 0x00, 0x00, 0x08, |
| 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, |
| 0x05, 0x55, 0xff, 0x3b, 0x01, 0x79, 0x08, 0x00, 0x00, 0x03, 0x00, 0x00, |
| 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, |
| 0x00, 0x04, 0x01, 0x1c, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, |
| 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x40, 0x00, 0x2e, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08, 0x00, 0x01, 0x90, 0x00, 0x05, |
| 0x00, 0x00, 0x05, 0x33, 0x05, 0x99, 0x00, 0x00, 0x01, 0x1e, 0x05, 0x33, |
| 0x05, 0x99, 0x00, 0x00, 0x03, 0xd7, 0x00, 0x66, 0x02, 0x12, 0x00, 0x00, |
| 0x05, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x73, 0x6b, 0x69, 0x61, 0x00, 0xc0, 0x00, 0x00, 0xf0, 0x21, |
| 0x06, 0x66, 0xfe, 0x66, 0x01, 0x79, 0x05, 0x55, 0x00, 0xc5, 0x80, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x20, 0x00, 0x01, 0x08, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x00, |
| 0x08, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, |
| 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x04, 0x00, 0x48, |
| 0x00, 0x00, 0x00, 0x0e, 0x00, 0x08, 0x00, 0x02, 0x00, 0x06, 0x00, 0x00, |
| 0x00, 0x09, 0x00, 0x0d, 0x00, 0x1d, 0x00, 0x21, 0xf0, 0x21, 0xff, 0xff, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x0d, 0x00, 0x1d, 0x00, 0x21, |
| 0xf0, 0x21, 0xff, 0xff, 0x00, 0x01, 0xff, 0xf9, 0xff, 0xf5, 0xff, 0xe4, |
| 0xff, 0xe2, 0x0f, 0xe2, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, |
| 0x00, 0x14, 0x00, 0x14, 0x01, 0xa0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x44, |
| 0x00, 0x00, 0x02, 0x64, 0x05, 0x55, 0x00, 0x03, 0x00, 0x07, 0x00, 0x00, |
| 0x33, 0x11, 0x21, 0x11, 0x25, 0x21, 0x11, 0x21, 0x44, 0x02, 0x20, 0xfe, |
| 0x24, 0x01, 0x98, 0xfe, 0x68, 0x05, 0x55, 0xfa, 0xab, 0x44, 0x04, 0xcd, |
| 0x00, 0x04, 0x00, 0x03, 0xff, 0x3b, 0x08, 0x00, 0x05, 0x4c, 0x00, 0x15, |
| 0x00, 0x1d, 0x00, 0x25, 0x01, 0x1b, 0x00, 0x00, 0x01, 0x36, 0x37, 0x36, |
| 0x27, 0x26, 0x07, 0x06, 0x06, 0x23, 0x22, 0x27, 0x26, 0x27, 0x26, 0x07, |
| 0x06, 0x17, 0x16, 0x17, 0x16, 0x32, 0x37, 0x32, 0x35, 0x34, 0x23, 0x22, |
| 0x15, 0x14, 0x27, 0x32, 0x35, 0x34, 0x23, 0x22, 0x15, 0x14, 0x03, 0x32, |
| 0x17, 0x30, 0x17, 0x31, 0x36, 0x37, 0x36, 0x37, 0x36, 0x37, 0x36, 0x33, |
| 0x32, 0x33, 0x16, 0x33, 0x32, 0x17, 0x16, 0x07, 0x06, 0x23, 0x22, 0x27, |
| 0x26, 0x27, 0x26, 0x23, 0x22, 0x07, 0x07, 0x06, 0x07, 0x06, 0x07, 0x06, |
| 0x1f, 0x02, 0x37, 0x36, 0x37, 0x36, 0x33, 0x32, 0x17, 0x17, 0x16, 0x33, |
| 0x16, 0x17, 0x16, 0x07, 0x06, 0x23, 0x22, 0x27, 0x27, 0x26, 0x23, 0x22, |
| 0x07, 0x06, 0x07, 0x06, 0x17, 0x16, 0x17, 0x16, 0x33, 0x32, 0x33, 0x32, |
| 0x37, 0x36, 0x37, 0x36, 0x17, 0x16, 0x1f, 0x02, 0x16, 0x17, 0x16, 0x15, |
| 0x14, 0x23, 0x22, 0x27, 0x27, 0x26, 0x27, 0x27, 0x26, 0x27, 0x26, 0x07, |
| 0x06, 0x07, 0x06, 0x17, 0x16, 0x17, 0x16, 0x15, 0x14, 0x07, 0x06, 0x07, |
| 0x06, 0x23, 0x22, 0x27, 0x26, 0x07, 0x06, 0x07, 0x06, 0x15, 0x14, 0x17, |
| 0x16, 0x17, 0x16, 0x15, 0x14, 0x07, 0x06, 0x23, 0x22, 0x27, 0x26, 0x27, |
| 0x26, 0x35, 0x34, 0x37, 0x36, 0x37, 0x36, 0x37, 0x34, 0x27, 0x26, 0x07, |
| 0x06, 0x07, 0x06, 0x0f, 0x02, 0x06, 0x23, 0x22, 0x27, 0x26, 0x35, 0x34, |
| 0x37, 0x37, 0x36, 0x37, 0x36, 0x37, 0x36, 0x37, 0x36, 0x27, 0x26, 0x27, |
| 0x26, 0x07, 0x06, 0x07, 0x06, 0x07, 0x06, 0x07, 0x07, 0x06, 0x23, 0x22, |
| 0x27, 0x26, 0x35, 0x34, 0x37, 0x36, 0x37, 0x37, 0x36, 0x37, 0x37, 0x36, |
| 0x37, 0x36, 0x37, 0x36, 0x35, 0x34, 0x27, 0x26, 0x27, 0x26, 0x27, 0x26, |
| 0x23, 0x22, 0x07, 0x06, 0x07, 0x06, 0x07, 0x06, 0x27, 0x26, 0x27, 0x26, |
| 0x27, 0x26, 0x35, 0x34, 0x37, 0x36, 0x37, 0x36, 0x37, 0x36, 0x33, 0x32, |
| 0x17, 0x16, 0x33, 0x32, 0x37, 0x36, 0x35, 0x34, 0x37, 0x36, 0x37, 0x36, |
| 0x33, 0x04, 0xf5, 0x23, 0x13, 0x11, 0x14, 0x16, 0x1d, 0x1b, 0x4c, 0x1f, |
| 0x0e, 0x2d, 0x23, 0x14, 0x2c, 0x13, 0x18, 0x25, 0x2c, 0x10, 0x3c, 0x71, |
| 0x1d, 0x5c, 0x5c, 0x3f, 0xae, 0x5c, 0x5c, 0x3f, 0x6a, 0x27, 0x31, 0x5b, |
| 0x09, 0x27, 0x36, 0x03, 0x0a, 0x26, 0x35, 0x2e, 0x09, 0x08, 0xc6, 0x13, |
| 0x81, 0x17, 0x20, 0x18, 0x21, 0x1e, 0x04, 0x04, 0x15, 0x5c, 0x22, 0x26, |
| 0x48, 0x56, 0x3b, 0x10, 0x21, 0x01, 0x0c, 0x06, 0x06, 0x0f, 0x31, 0x44, |
| 0x3c, 0x52, 0x4a, 0x1d, 0x11, 0x3f, 0xb4, 0x71, 0x01, 0x26, 0x06, 0x0d, |
| 0x15, 0x1a, 0x2a, 0x13, 0x53, 0xaa, 0x42, 0x1d, 0x0a, 0x33, 0x20, 0x21, |
| 0x2b, 0x01, 0x02, 0x3e, 0x21, 0x09, 0x02, 0x02, 0x0f, 0x2d, 0x4b, 0x0a, |
| 0x22, 0x15, 0x20, 0x1f, 0x72, 0x8b, 0x2d, 0x2f, 0x1d, 0x1f, 0x0e, 0x25, |
| 0x3f, 0x4d, 0x1b, 0x63, 0x2a, 0x2c, 0x14, 0x22, 0x18, 0x1c, 0x0f, 0x08, |
| 0x2a, 0x08, 0x08, 0x0d, 0x3b, 0x4c, 0x52, 0x74, 0x27, 0x71, 0x2e, 0x01, |
| 0x0c, 0x10, 0x15, 0x0d, 0x06, 0x0d, 0x05, 0x01, 0x06, 0x2c, 0x28, 0x14, |
| 0x1b, 0x05, 0x04, 0x10, 0x06, 0x12, 0x08, 0x0a, 0x16, 0x27, 0x03, 0x0d, |
| 0x30, 0x4c, 0x4c, 0x4b, 0x1f, 0x0b, 0x22, 0x26, 0x0d, 0x15, 0x0d, 0x2d, |
| 0x68, 0x34, 0x14, 0x3c, 0x25, 0x12, 0x04, 0x10, 0x18, 0x0b, 0x09, 0x30, |
| 0x2b, 0x44, 0x66, 0x14, 0x47, 0x47, 0x59, 0x73, 0x25, 0x05, 0x03, 0x1f, |
| 0x01, 0x08, 0x3f, 0x48, 0x4b, 0x4b, 0x76, 0x2f, 0x49, 0x2d, 0x22, 0x24, |
| 0x0c, 0x15, 0x08, 0x0e, 0x33, 0x03, 0x44, 0x4c, 0x10, 0x46, 0x13, 0x1f, |
| 0x27, 0x1b, 0x1d, 0x13, 0x02, 0x24, 0x08, 0x02, 0x42, 0x0e, 0x4d, 0x3c, |
| 0x19, 0x1b, 0x40, 0x2b, 0x2b, 0x1e, 0x16, 0x11, 0x04, 0x1f, 0x11, 0x04, |
| 0x18, 0x11, 0x35, 0x01, 0xa3, 0x13, 0x24, 0x1f, 0x0b, 0x0c, 0x19, 0x19, |
| 0x18, 0x13, 0x0f, 0x0c, 0x1a, 0x18, 0x1f, 0x19, 0x1e, 0x07, 0x1a, 0xc3, |
| 0x54, 0x51, 0x54, 0x51, 0x04, 0x53, 0x51, 0x54, 0x50, 0x02, 0x48, 0x1a, |
| 0x31, 0x18, 0x55, 0x74, 0x04, 0x0e, 0x09, 0x0d, 0x06, 0x10, 0x16, 0x1b, |
| 0x24, 0x01, 0x04, 0x0b, 0x04, 0x10, 0x3f, 0x0a, 0x41, 0x02, 0x41, 0x20, |
| 0x06, 0x12, 0x16, 0x21, 0x17, 0x2a, 0x1e, 0x15, 0x40, 0x27, 0x11, 0x0e, |
| 0x1e, 0x11, 0x15, 0x1f, 0x43, 0x13, 0x1a, 0x10, 0x15, 0x1b, 0x04, 0x09, |
| 0x4d, 0x2a, 0x0f, 0x19, 0x0a, 0x0a, 0x03, 0x05, 0x15, 0x3c, 0x64, 0x21, |
| 0x4b, 0x2e, 0x21, 0x28, 0x13, 0x47, 0x44, 0x19, 0x3f, 0x11, 0x18, 0x0b, |
| 0x0a, 0x07, 0x18, 0x0d, 0x07, 0x24, 0x2c, 0x2b, 0x21, 0x32, 0x10, 0x48, |
| 0x2a, 0x2d, 0x1e, 0x1a, 0x01, 0x0c, 0x43, 0x59, 0x28, 0x4e, 0x1c, 0x0d, |
| 0x5d, 0x24, 0x14, 0x0a, 0x05, 0x1f, 0x24, 0x32, 0x46, 0x3e, 0x5f, 0x3e, |
| 0x44, 0x1a, 0x30, 0x15, 0x0d, 0x07, 0x18, 0x2b, 0x03, 0x0d, 0x1a, 0x28, |
| 0x28, 0x57, 0xb2, 0x29, 0x27, 0x40, 0x2c, 0x23, 0x16, 0x63, 0x58, 0x1a, |
| 0x0a, 0x18, 0x11, 0x23, 0x08, 0x1b, 0x29, 0x05, 0x04, 0x0b, 0x15, 0x0d, |
| 0x14, 0x0b, 0x2a, 0x29, 0x5a, 0x62, 0x01, 0x19, 0x1e, 0x05, 0x05, 0x26, |
| 0x42, 0x42, 0x2a, 0x2a, 0x3f, 0x0d, 0x0f, 0x09, 0x05, 0x07, 0x01, 0x0b, |
| 0x25, 0x3e, 0x0d, 0x17, 0x11, 0x01, 0x03, 0x0d, 0x13, 0x20, 0x19, 0x11, |
| 0x03, 0x02, 0x01, 0x04, 0x11, 0x04, 0x05, 0x1b, 0x3d, 0x10, 0x29, 0x20, |
| 0x04, 0x04, 0x0a, 0x07, 0x04, 0x1f, 0x15, 0x20, 0x3e, 0x0f, 0x2a, 0x1e, |
| 0x00, 0x00, 0x00, 0x1b, 0x01, 0x4a, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x1b, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x01, 0x00, 0x0c, 0x00, 0x1b, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x02, 0x00, 0x07, 0x00, 0x27, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x03, 0x00, 0x0c, 0x00, 0x1b, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x04, 0x00, 0x0c, 0x00, 0x1b, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x05, 0x00, 0x02, 0x00, 0x2e, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x06, 0x00, 0x0c, 0x00, 0x1b, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x0d, 0x00, 0x1b, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x0e, 0x00, 0x1a, 0x00, 0x30, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x00, 0x00, 0x36, 0x00, 0x4a, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x01, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x02, 0x00, 0x0e, 0x00, 0x98, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x03, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x04, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x05, 0x00, 0x04, 0x00, 0xa6, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x06, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x0d, 0x00, 0x36, 0x00, 0x4a, 0x00, 0x03, 0x00, 0x00, 0x04, 0x09, |
| 0x00, 0x0e, 0x00, 0x34, 0x00, 0xaa, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x00, 0x00, 0x36, 0x00, 0x4a, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x01, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x02, 0x00, 0x0e, 0x00, 0x98, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x03, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x04, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x05, 0x00, 0x04, 0x00, 0xa6, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x06, 0x00, 0x18, 0x00, 0x80, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x0d, 0x00, 0x36, 0x00, 0x4a, 0x00, 0x03, 0x00, 0x01, 0x04, 0x09, |
| 0x00, 0x0e, 0x00, 0x34, 0x00, 0xaa, 0x43, 0x6f, 0x70, 0x79, 0x72, 0x69, |
| 0x67, 0x68, 0x74, 0x20, 0x28, 0x63, 0x29, 0x20, 0x32, 0x30, 0x31, 0x35, |
| 0x2c, 0x20, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x53, 0x70, 0x69, |
| 0x64, 0x65, 0x72, 0x53, 0x79, 0x6d, 0x62, 0x6f, 0x6c, 0x52, 0x65, 0x67, |
| 0x75, 0x6c, 0x61, 0x72, 0x56, 0x31, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, |
| 0x2f, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x73, 0x2e, 0x73, 0x69, 0x6c, |
| 0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x4f, 0x46, 0x4c, 0x00, 0x43, 0x00, 0x6f, |
| 0x00, 0x70, 0x00, 0x79, 0x00, 0x72, 0x00, 0x69, 0x00, 0x67, 0x00, 0x68, |
| 0x00, 0x74, 0x00, 0x20, 0x00, 0x28, 0x00, 0x63, 0x00, 0x29, 0x00, 0x20, |
| 0x00, 0x32, 0x00, 0x30, 0x00, 0x31, 0x00, 0x35, 0x00, 0x2c, 0x00, 0x20, |
| 0x00, 0x47, 0x00, 0x6f, 0x00, 0x6f, 0x00, 0x67, 0x00, 0x6c, 0x00, 0x65, |
| 0x00, 0x2e, 0x00, 0x53, 0x00, 0x70, 0x00, 0x69, 0x00, 0x64, 0x00, 0x65, |
| 0x00, 0x72, 0x00, 0x53, 0x00, 0x79, 0x00, 0x6d, 0x00, 0x62, 0x00, 0x6f, |
| 0x00, 0x6c, 0x00, 0x52, 0x00, 0x65, 0x00, 0x67, 0x00, 0x75, 0x00, 0x6c, |
| 0x00, 0x61, 0x00, 0x72, 0x00, 0x56, 0x00, 0x31, 0x00, 0x68, 0x00, 0x74, |
| 0x00, 0x74, 0x00, 0x70, 0x00, 0x3a, 0x00, 0x2f, 0x00, 0x2f, 0x00, 0x73, |
| 0x00, 0x63, 0x00, 0x72, 0x00, 0x69, 0x00, 0x70, 0x00, 0x74, 0x00, 0x73, |
| 0x00, 0x2e, 0x00, 0x73, 0x00, 0x69, 0x00, 0x6c, 0x00, 0x2e, 0x00, 0x6f, |
| 0x00, 0x72, 0x00, 0x67, 0x00, 0x2f, 0x00, 0x4f, 0x00, 0x46, 0x00, 0x4c, |
| 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x66, |
| 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, |
| 0xff, 0xff, 0x00, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x0c, 0x00, 0x14, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, |
| 0x00, 0x02, 0x00, 0x00 |
| }; |
| |
| enum class SmoothBehavior { |
| none, // SmoothFonts produces no effect. |
| some, // SmoothFonts produces some effect, but not subpixel coverage. |
| subpixel, // SmoothFonts produces some effect and provides subpixel coverage. |
| }; |
| |
| /** |
| * There does not appear to be a publicly accessable API for determining if lcd |
| * font smoothing will be applied if we request it. The main issue is that if |
| * smoothing is applied a gamma of 2.0 will be used, if not a gamma of 1.0. |
| */ |
| static SmoothBehavior smooth_behavior() { |
| static SmoothBehavior gSmoothBehavior = []{ |
| uint32_t noSmoothBitmap[16][16] = {}; |
| uint32_t smoothBitmap[16][16] = {}; |
| |
| SkUniqueCFRef<CGColorSpaceRef> colorspace(CGColorSpaceCreateDeviceRGB()); |
| SkUniqueCFRef<CGContextRef> noSmoothContext( |
| CGBitmapContextCreate(&noSmoothBitmap, 16, 16, 8, 16*4, |
| colorspace.get(), BITMAP_INFO_RGB)); |
| SkUniqueCFRef<CGContextRef> smoothContext( |
| CGBitmapContextCreate(&smoothBitmap, 16, 16, 8, 16*4, |
| colorspace.get(), BITMAP_INFO_RGB)); |
| |
| SkUniqueCFRef<CGDataProviderRef> data( |
| CGDataProviderCreateWithData(nullptr, kSpiderSymbol_ttf, |
| SK_ARRAY_COUNT(kSpiderSymbol_ttf), nullptr)); |
| SkUniqueCFRef<CGFontRef> cgFont(CGFontCreateWithDataProvider(data.get())); |
| SkASSERT(cgFont); |
| SkUniqueCFRef<CTFontRef> ctFont( |
| CTFontCreateWithGraphicsFont(cgFont.get(), 16, nullptr, nullptr)); |
| SkASSERT(ctFont); |
| |
| CGContextSetShouldSmoothFonts(noSmoothContext.get(), false); |
| CGContextSetShouldAntialias(noSmoothContext.get(), true); |
| CGContextSetTextDrawingMode(noSmoothContext.get(), kCGTextFill); |
| CGContextSetGrayFillColor(noSmoothContext.get(), 1, 1); |
| |
| CGContextSetShouldSmoothFonts(smoothContext.get(), true); |
| CGContextSetShouldAntialias(smoothContext.get(), true); |
| CGContextSetTextDrawingMode(smoothContext.get(), kCGTextFill); |
| CGContextSetGrayFillColor(smoothContext.get(), 1, 1); |
| |
| CGPoint point = CGPointMake(0, 3); |
| CGGlyph spiderGlyph = 3; |
| CTFontDrawGlyphs(ctFont.get(), &spiderGlyph, &point, 1, noSmoothContext.get()); |
| CTFontDrawGlyphs(ctFont.get(), &spiderGlyph, &point, 1, smoothContext.get()); |
| |
| // For debugging. |
| //SkUniqueCFRef<CGImageRef> image(CGBitmapContextCreateImage(noSmoothContext())); |
| //SkUniqueCFRef<CGImageRef> image(CGBitmapContextCreateImage(smoothContext())); |
| |
| SmoothBehavior smoothBehavior = SmoothBehavior::none; |
| for (int x = 0; x < 16; ++x) { |
| for (int y = 0; y < 16; ++y) { |
| uint32_t smoothPixel = smoothBitmap[x][y]; |
| uint32_t r = (smoothPixel >> 16) & 0xFF; |
| uint32_t g = (smoothPixel >> 8) & 0xFF; |
| uint32_t b = (smoothPixel >> 0) & 0xFF; |
| if (r != g || r != b) { |
| return SmoothBehavior::subpixel; |
| } |
| if (noSmoothBitmap[x][y] != smoothPixel) { |
| smoothBehavior = SmoothBehavior::some; |
| } |
| } |
| } |
| return smoothBehavior; |
| }(); |
| return gSmoothBehavior; |
| } |
| |
| class Offscreen { |
| public: |
| Offscreen() |
| : fRGBSpace(nullptr) |
| , fCG(nullptr) |
| , fDoAA(false) |
| , fDoLCD(false) |
| { |
| fSize.set(0, 0); |
| } |
| |
| CGRGBPixel* getCG(const SkScalerContext_Mac& context, const SkGlyph& glyph, |
| CGGlyph glyphID, size_t* rowBytesPtr, bool generateA8FromLCD); |
| |
| private: |
| enum { |
| kSize = 32 * 32 * sizeof(CGRGBPixel) |
| }; |
| SkAutoSMalloc<kSize> fImageStorage; |
| SkUniqueCFRef<CGColorSpaceRef> fRGBSpace; |
| |
| // cached state |
| SkUniqueCFRef<CGContextRef> fCG; |
| SkISize fSize; |
| bool fDoAA; |
| bool fDoLCD; |
| |
| static int RoundSize(int dimension) { |
| return SkNextPow2(dimension); |
| } |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool find_dict_CGFloat(CFDictionaryRef dict, CFStringRef name, CGFloat* value) { |
| CFNumberRef num; |
| return CFDictionaryGetValueIfPresent(dict, name, (const void**)&num) |
| && CFNumberIsFloatType(num) |
| && CFNumberGetValue(num, kCFNumberCGFloatType, value); |
| } |
| |
| template <typename S, typename D, typename C> struct LinearInterpolater { |
| struct Mapping { |
| S src_val; |
| D dst_val; |
| }; |
| constexpr LinearInterpolater(Mapping const mapping[], int mappingCount) |
| : fMapping(mapping), fMappingCount(mappingCount) {} |
| |
| static D map(S value, S src_min, S src_max, D dst_min, D dst_max) { |
| SkASSERT(src_min < src_max); |
| SkASSERT(dst_min <= dst_max); |
| return C()(dst_min + (((value - src_min) * (dst_max - dst_min)) / (src_max - src_min))); |
| } |
| |
| D map(S val) const { |
| // -Inf to [0] |
| if (val < fMapping[0].src_val) { |
| return fMapping[0].dst_val; |
| } |
| |
| // Linear from [i] to [i+1] |
| for (int i = 0; i < fMappingCount - 1; ++i) { |
| if (val < fMapping[i+1].src_val) { |
| return map(val, fMapping[i].src_val, fMapping[i+1].src_val, |
| fMapping[i].dst_val, fMapping[i+1].dst_val); |
| } |
| } |
| |
| // From [n] to +Inf |
| // if (fcweight < Inf) |
| return fMapping[fMappingCount - 1].dst_val; |
| } |
| |
| Mapping const * fMapping; |
| int fMappingCount; |
| }; |
| |
| struct RoundCGFloatToInt { |
| int operator()(CGFloat s) { return s + 0.5; } |
| }; |
| struct CGFloatIdentity { |
| CGFloat operator()(CGFloat s) { return s; } |
| }; |
| |
| /** Returns the [-1, 1] CTFontDescriptor weights for the |
| * <0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000> CSS weights. |
| * |
| * It is assumed that the values will be interpolated linearly between these points. |
| * NSFontWeightXXX were added in 10.11, appear in 10.10, but do not appear in 10.9. |
| * The actual values appear to be stable, but they may change in the future without notice. |
| */ |
| static CGFloat(&get_NSFontWeight_mapping())[11] { |
| |
| // Declarations in <AppKit/AppKit.h> on macOS, <UIKit/UIKit.h> on iOS |
| #ifdef SK_BUILD_FOR_MAC |
| # define SK_KIT_FONT_WEIGHT_PREFIX "NS" |
| #endif |
| #ifdef SK_BUILD_FOR_IOS |
| # define SK_KIT_FONT_WEIGHT_PREFIX "UI" |
| #endif |
| static constexpr struct { |
| CGFloat defaultValue; |
| const char* name; |
| } nsFontWeightLoaderInfos[] = { |
| { -0.80f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightUltraLight" }, |
| { -0.60f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightThin" }, |
| { -0.40f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightLight" }, |
| { 0.00f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightRegular" }, |
| { 0.23f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightMedium" }, |
| { 0.30f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightSemibold" }, |
| { 0.40f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightBold" }, |
| { 0.56f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightHeavy" }, |
| { 0.62f, SK_KIT_FONT_WEIGHT_PREFIX "FontWeightBlack" }, |
| }; |
| |
| static_assert(SK_ARRAY_COUNT(nsFontWeightLoaderInfos) == 9, ""); |
| static CGFloat nsFontWeights[11]; |
| static SkOnce once; |
| once([&] { |
| size_t i = 0; |
| nsFontWeights[i++] = -1.00; |
| for (const auto& nsFontWeightLoaderInfo : nsFontWeightLoaderInfos) { |
| void* nsFontWeightValuePtr = dlsym(RTLD_DEFAULT, nsFontWeightLoaderInfo.name); |
| if (nsFontWeightValuePtr) { |
| nsFontWeights[i++] = *(static_cast<CGFloat*>(nsFontWeightValuePtr)); |
| } else { |
| nsFontWeights[i++] = nsFontWeightLoaderInfo.defaultValue; |
| } |
| } |
| nsFontWeights[i++] = 1.00; |
| }); |
| return nsFontWeights; |
| } |
| |
| /** Convert the [0, 1000] CSS weight to [-1, 1] CTFontDescriptor weight (for system fonts). |
| * |
| * The -1 to 1 weights reported by CTFontDescriptors have different mappings depending on if the |
| * CTFont is native or created from a CGDataProvider. |
| */ |
| static CGFloat fontstyle_to_ct_weight(int fontstyleWeight) { |
| using Interpolator = LinearInterpolater<int, CGFloat, CGFloatIdentity>; |
| |
| // Note that Mac supports the old OS2 version A so 0 through 10 are as if multiplied by 100. |
| // However, on this end we can't tell, so this is ignored. |
| |
| static Interpolator::Mapping nativeWeightMappings[11]; |
| static SkOnce once; |
| once([&] { |
| CGFloat(&nsFontWeights)[11] = get_NSFontWeight_mapping(); |
| for (int i = 0; i < 11; ++i) { |
| nativeWeightMappings[i].src_val = i * 100; |
| nativeWeightMappings[i].dst_val = nsFontWeights[i]; |
| } |
| }); |
| static constexpr Interpolator nativeInterpolator( |
| nativeWeightMappings, SK_ARRAY_COUNT(nativeWeightMappings)); |
| |
| return nativeInterpolator.map(fontstyleWeight); |
| } |
| |
| |
| /** Convert the [-1, 1] CTFontDescriptor weight to [0, 1000] CSS weight. |
| * |
| * The -1 to 1 weights reported by CTFontDescriptors have different mappings depending on if the |
| * CTFont is native or created from a CGDataProvider. |
| */ |
| static int ct_weight_to_fontstyle(CGFloat cgWeight, bool fromDataProvider) { |
| using Interpolator = LinearInterpolater<CGFloat, int, RoundCGFloatToInt>; |
| |
| // Note that Mac supports the old OS2 version A so 0 through 10 are as if multiplied by 100. |
| // However, on this end we can't tell, so this is ignored. |
| |
| /** This mapping for CGDataProvider created fonts is determined by creating font data with every |
| * weight, creating a CTFont, and asking the CTFont for its weight. See the TypefaceStyle test |
| * in tests/TypefaceTest.cpp for the code used to determine these values. |
| */ |
| static constexpr Interpolator::Mapping dataProviderWeightMappings[] = { |
| { -1.00, 0 }, |
| { -0.70, 100 }, |
| { -0.50, 200 }, |
| { -0.23, 300 }, |
| { 0.00, 400 }, |
| { 0.20, 500 }, |
| { 0.30, 600 }, |
| { 0.40, 700 }, |
| { 0.60, 800 }, |
| { 0.80, 900 }, |
| { 1.00, 1000 }, |
| }; |
| static constexpr Interpolator dataProviderInterpolator( |
| dataProviderWeightMappings, SK_ARRAY_COUNT(dataProviderWeightMappings)); |
| |
| static Interpolator::Mapping nativeWeightMappings[11]; |
| static SkOnce once; |
| once([&] { |
| CGFloat(&nsFontWeights)[11] = get_NSFontWeight_mapping(); |
| for (int i = 0; i < 11; ++i) { |
| nativeWeightMappings[i].src_val = nsFontWeights[i]; |
| nativeWeightMappings[i].dst_val = i * 100; |
| } |
| }); |
| static constexpr Interpolator nativeInterpolator( |
| nativeWeightMappings, SK_ARRAY_COUNT(nativeWeightMappings)); |
| |
| return fromDataProvider ? dataProviderInterpolator.map(cgWeight) |
| : nativeInterpolator.map(cgWeight); |
| } |
| |
| /** Convert the [0, 10] CSS weight to [-1, 1] CTFontDescriptor width. */ |
| static int fontstyle_to_ct_width(int fontstyleWidth) { |
| using Interpolator = LinearInterpolater<int, CGFloat, CGFloatIdentity>; |
| |
| // Values determined by creating font data with every width, creating a CTFont, |
| // and asking the CTFont for its width. See TypefaceStyle test for basics. |
| static constexpr Interpolator::Mapping widthMappings[] = { |
| { 0, -0.5 }, |
| { 10, 0.5 }, |
| }; |
| static constexpr Interpolator interpolator(widthMappings, SK_ARRAY_COUNT(widthMappings)); |
| return interpolator.map(fontstyleWidth); |
| } |
| |
| /** Convert the [-1, 1] CTFontDescriptor width to [0, 10] CSS weight. */ |
| static int ct_width_to_fontstyle(CGFloat cgWidth) { |
| using Interpolator = LinearInterpolater<CGFloat, int, RoundCGFloatToInt>; |
| |
| // Values determined by creating font data with every width, creating a CTFont, |
| // and asking the CTFont for its width. See TypefaceStyle test for basics. |
| static constexpr Interpolator::Mapping widthMappings[] = { |
| { -0.5, 0 }, |
| { 0.5, 10 }, |
| }; |
| static constexpr Interpolator interpolator(widthMappings, SK_ARRAY_COUNT(widthMappings)); |
| return interpolator.map(cgWidth); |
| } |
| |
| static SkFontStyle fontstyle_from_descriptor(CTFontDescriptorRef desc, bool fromDataProvider) { |
| SkUniqueCFRef<CFTypeRef> traits(CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute)); |
| if (!traits || CFDictionaryGetTypeID() != CFGetTypeID(traits.get())) { |
| return SkFontStyle(); |
| } |
| SkUniqueCFRef<CFDictionaryRef> fontTraitsDict(static_cast<CFDictionaryRef>(traits.release())); |
| |
| CGFloat weight, width, slant; |
| if (!find_dict_CGFloat(fontTraitsDict.get(), kCTFontWeightTrait, &weight)) { |
| weight = 0; |
| } |
| if (!find_dict_CGFloat(fontTraitsDict.get(), kCTFontWidthTrait, &width)) { |
| width = 0; |
| } |
| if (!find_dict_CGFloat(fontTraitsDict.get(), kCTFontSlantTrait, &slant)) { |
| slant = 0; |
| } |
| |
| return SkFontStyle(ct_weight_to_fontstyle(weight, fromDataProvider), |
| ct_width_to_fontstyle(width), |
| slant ? SkFontStyle::kItalic_Slant |
| : SkFontStyle::kUpright_Slant); |
| } |
| |
| class SkTypeface_Mac : public SkTypeface { |
| public: |
| SkTypeface_Mac(SkUniqueCFRef<CTFontRef> fontRef, SkUniqueCFRef<CFTypeRef> resourceRef, |
| const SkFontStyle& fs, bool isFixedPitch, |
| bool isLocalStream) |
| : SkTypeface(fs, isFixedPitch) |
| , fFontRef(std::move(fontRef)) |
| , fOriginatingCFTypeRef(std::move(resourceRef)) |
| , fHasColorGlyphs( |
| SkToBool(CTFontGetSymbolicTraits(fFontRef.get()) & kCTFontColorGlyphsTrait)) |
| , fIsLocalStream(isLocalStream) |
| { |
| SkASSERT(fFontRef); |
| } |
| |
| SkUniqueCFRef<CTFontRef> fFontRef; |
| SkUniqueCFRef<CFTypeRef> fOriginatingCFTypeRef; |
| const bool fHasColorGlyphs; |
| |
| protected: |
| int onGetUPEM() const override; |
| std::unique_ptr<SkStreamAsset> onOpenStream(int* ttcIndex) const override; |
| std::unique_ptr<SkFontData> onMakeFontData() const override; |
| int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], |
| int coordinateCount) const override; |
| void onGetFamilyName(SkString* familyName) const override; |
| SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override; |
| int onGetTableTags(SkFontTableTag tags[]) const override; |
| size_t onGetTableData(SkFontTableTag, size_t offset, size_t length, void* data) const override; |
| SkScalerContext* onCreateScalerContext(const SkScalerContextEffects&, |
| const SkDescriptor*) const override; |
| void onFilterRec(SkScalerContextRec*) const override; |
| void onGetFontDescriptor(SkFontDescriptor*, bool*) const override; |
| void getGlyphToUnicodeMap(SkUnichar*) const override; |
| std::unique_ptr<SkAdvancedTypefaceMetrics> onGetAdvancedMetrics() const override; |
| int onCharsToGlyphs(const void* chars, Encoding, |
| uint16_t glyphs[], int glyphCount) const override; |
| int onCountGlyphs() const override; |
| |
| void* onGetCTFontRef() const override { return (void*)fFontRef.get(); } |
| |
| private: |
| bool fIsLocalStream; |
| |
| typedef SkTypeface INHERITED; |
| }; |
| |
| static bool find_by_CTFontRef(SkTypeface* cached, void* context) { |
| CTFontRef self = (CTFontRef)context; |
| CTFontRef other = (CTFontRef)cached->internal_private_getCTFontRef(); |
| |
| return CFEqual(self, other); |
| } |
| |
| /** Creates a typeface, searching the cache if isLocalStream is false. */ |
| static sk_sp<SkTypeface> create_from_CTFontRef(SkUniqueCFRef<CTFontRef> font, |
| SkUniqueCFRef<CFTypeRef> resource, |
| bool isLocalStream) { |
| SkASSERT(font); |
| |
| if (!isLocalStream) { |
| SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_by_CTFontRef, (void*)font.get()); |
| if (face) { |
| return sk_sp<SkTypeface>(face); |
| } |
| } |
| |
| SkUniqueCFRef<CTFontDescriptorRef> desc(CTFontCopyFontDescriptor(font.get())); |
| SkFontStyle style = fontstyle_from_descriptor(desc.get(), isLocalStream); |
| CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(font.get()); |
| bool isFixedPitch = SkToBool(traits & kCTFontMonoSpaceTrait); |
| |
| SkTypeface* face = new SkTypeface_Mac(std::move(font), std::move(resource), |
| style, isFixedPitch, isLocalStream); |
| if (!isLocalStream) { |
| SkTypefaceCache::Add(face); |
| } |
| return sk_sp<SkTypeface>(face); |
| } |
| |
| /** Creates a typeface from a descriptor, searching the cache. */ |
| static sk_sp<SkTypeface> create_from_desc(CTFontDescriptorRef desc) { |
| SkUniqueCFRef<CTFontRef> ctFont(CTFontCreateWithFontDescriptor(desc, 0, nullptr)); |
| if (!ctFont) { |
| return nullptr; |
| } |
| |
| return create_from_CTFontRef(std::move(ctFont), nullptr, false); |
| } |
| |
| static SkUniqueCFRef<CTFontDescriptorRef> create_descriptor(const char familyName[], |
| const SkFontStyle& style) { |
| SkUniqueCFRef<CFMutableDictionaryRef> cfAttributes( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, 0, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| SkUniqueCFRef<CFMutableDictionaryRef> cfTraits( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, 0, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| if (!cfAttributes || !cfTraits) { |
| return nullptr; |
| } |
| |
| // CTFontTraits (symbolic) |
| // macOS 14 and iOS 12 seem to behave badly when kCTFontSymbolicTrait is set. |
| |
| // CTFontTraits (weight) |
| CGFloat ctWeight = fontstyle_to_ct_weight(style.weight()); |
| SkUniqueCFRef<CFNumberRef> cfFontWeight( |
| CFNumberCreate(kCFAllocatorDefault, kCFNumberCGFloatType, &ctWeight)); |
| if (cfFontWeight) { |
| CFDictionaryAddValue(cfTraits.get(), kCTFontWeightTrait, cfFontWeight.get()); |
| } |
| // CTFontTraits (width) |
| CGFloat ctWidth = fontstyle_to_ct_width(style.width()); |
| SkUniqueCFRef<CFNumberRef> cfFontWidth( |
| CFNumberCreate(kCFAllocatorDefault, kCFNumberCGFloatType, &ctWidth)); |
| if (cfFontWidth) { |
| CFDictionaryAddValue(cfTraits.get(), kCTFontWidthTrait, cfFontWidth.get()); |
| } |
| // CTFontTraits (slant) |
| CGFloat ctSlant = style.slant() == SkFontStyle::kUpright_Slant ? 0 : 1; |
| SkUniqueCFRef<CFNumberRef> cfFontSlant( |
| CFNumberCreate(kCFAllocatorDefault, kCFNumberCGFloatType, &ctSlant)); |
| if (cfFontSlant) { |
| CFDictionaryAddValue(cfTraits.get(), kCTFontSlantTrait, cfFontSlant.get()); |
| } |
| // CTFontTraits |
| CFDictionaryAddValue(cfAttributes.get(), kCTFontTraitsAttribute, cfTraits.get()); |
| |
| // CTFontFamilyName |
| if (familyName) { |
| SkUniqueCFRef<CFStringRef> cfFontName = make_CFString(familyName); |
| if (cfFontName) { |
| CFDictionaryAddValue(cfAttributes.get(), kCTFontFamilyNameAttribute, cfFontName.get()); |
| } |
| } |
| |
| return SkUniqueCFRef<CTFontDescriptorRef>( |
| CTFontDescriptorCreateWithAttributes(cfAttributes.get())); |
| } |
| |
| /** Creates a typeface from a name, searching the cache. */ |
| static sk_sp<SkTypeface> create_from_name(const char familyName[], const SkFontStyle& style) { |
| SkUniqueCFRef<CTFontDescriptorRef> desc = create_descriptor(familyName, style); |
| if (!desc) { |
| return nullptr; |
| } |
| return create_from_desc(desc.get()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /* This function is visible on the outside. It first searches the cache, and if |
| * not found, returns a new entry (after adding it to the cache). |
| */ |
| SkTypeface* SkCreateTypefaceFromCTFont(CTFontRef font, CFTypeRef resource) { |
| CFRetain(font); |
| if (resource) { |
| CFRetain(resource); |
| } |
| return create_from_CTFontRef(SkUniqueCFRef<CTFontRef>(font), |
| SkUniqueCFRef<CFTypeRef>(resource), |
| false).release(); |
| } |
| |
| static const char* map_css_names(const char* name) { |
| static const struct { |
| const char* fFrom; // name the caller specified |
| const char* fTo; // "canonical" name we map to |
| } gPairs[] = { |
| { "sans-serif", "Helvetica" }, |
| { "serif", "Times" }, |
| { "monospace", "Courier" } |
| }; |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) { |
| if (strcmp(name, gPairs[i].fFrom) == 0) { |
| return gPairs[i].fTo; |
| } |
| } |
| return name; // no change |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkScalerContext_Mac : public SkScalerContext { |
| public: |
| SkScalerContext_Mac(sk_sp<SkTypeface_Mac>, const SkScalerContextEffects&, const SkDescriptor*); |
| |
| protected: |
| unsigned generateGlyphCount(void) override; |
| uint16_t generateCharToGlyph(SkUnichar uni) override; |
| bool generateAdvance(SkGlyph* glyph) override; |
| void generateMetrics(SkGlyph* glyph) override; |
| void generateImage(const SkGlyph& glyph) override; |
| bool generatePath(SkGlyphID glyph, SkPath* path) override; |
| void generateFontMetrics(SkFontMetrics*) override; |
| |
| private: |
| static void CTPathElement(void *info, const CGPathElement *element); |
| |
| Offscreen fOffscreen; |
| |
| /** Unrotated variant of fCTFont. |
| * |
| * In 10.10.1 CTFontGetAdvancesForGlyphs applies the font transform to the width of the |
| * advances, but always sets the height to 0. This font is used to get the advances of the |
| * unrotated glyph, and then the rotation is applied separately. |
| * |
| * CT vertical metrics are pre-rotated (in em space, before transform) 90deg clock-wise. |
| * This makes kCTFontOrientationDefault dangerous, because the metrics from |
| * kCTFontOrientationHorizontal are in a different space from kCTFontOrientationVertical. |
| * With kCTFontOrientationVertical the advances must be unrotated. |
| * |
| * Sometimes, creating a copy of a CTFont with the same size but different trasform will select |
| * different underlying font data. As a result, avoid ever creating more than one CTFont per |
| * SkScalerContext to ensure that only one CTFont is used. |
| * |
| * As a result of the above (and other constraints) this font contains the size, but not the |
| * transform. The transform must always be applied separately. |
| */ |
| SkUniqueCFRef<CTFontRef> fCTFont; |
| |
| /** The transform without the font size. */ |
| CGAffineTransform fTransform; |
| CGAffineTransform fInvTransform; |
| |
| SkUniqueCFRef<CGFontRef> fCGFont; |
| uint16_t fGlyphCount; |
| const bool fDoSubPosition; |
| |
| friend class Offscreen; |
| |
| typedef SkScalerContext INHERITED; |
| }; |
| |
| // CTFontCreateCopyWithAttributes or CTFontCreateCopyWithSymbolicTraits cannot be used on 10.10 |
| // and later, as they will return different underlying fonts depending on the size requested. |
| // It is not possible to use descriptors with CTFontCreateWithFontDescriptor, since that does not |
| // work with non-system fonts. As a result, create the strike specific CTFonts from the underlying |
| // CGFont. |
| static SkUniqueCFRef<CTFontRef> ctfont_create_exact_copy(CTFontRef baseFont, CGFloat textSize, |
| const CGAffineTransform* transform) |
| { |
| SkUniqueCFRef<CGFontRef> baseCGFont(CTFontCopyGraphicsFont(baseFont, nullptr)); |
| |
| // The last parameter (CTFontDescriptorRef attributes) *must* be nullptr. |
| // If non-nullptr then with fonts with variation axes, the copy will fail in |
| // CGFontVariationFromDictCallback when it assumes kCGFontVariationAxisName is CFNumberRef |
| // which it quite obviously is not. |
| |
| // Because we cannot setup the CTFont descriptor to match, the same restriction applies here |
| // as other uses of CTFontCreateWithGraphicsFont which is that such CTFonts should not escape |
| // the scaler context, since they aren't 'normal'. |
| return SkUniqueCFRef<CTFontRef>( |
| CTFontCreateWithGraphicsFont(baseCGFont.get(), textSize, transform, nullptr)); |
| } |
| |
| SkScalerContext_Mac::SkScalerContext_Mac(sk_sp<SkTypeface_Mac> typeface, |
| const SkScalerContextEffects& effects, |
| const SkDescriptor* desc) |
| : INHERITED(std::move(typeface), effects, desc) |
| , fDoSubPosition(SkToBool(fRec.fFlags & kSubpixelPositioning_Flag)) |
| |
| { |
| AUTO_CG_LOCK(); |
| |
| CTFontRef ctFont = (CTFontRef)this->getTypeface()->internal_private_getCTFontRef(); |
| CFIndex numGlyphs = CTFontGetGlyphCount(ctFont); |
| SkASSERT(numGlyphs >= 1 && numGlyphs <= 0xFFFF); |
| fGlyphCount = SkToU16(numGlyphs); |
| |
| // CT on (at least) 10.9 will size color glyphs down from the requested size, but not up. |
| // As a result, it is necessary to know the actual device size and request that. |
| SkVector scale; |
| SkMatrix skTransform; |
| bool invertible = fRec.computeMatrices(SkScalerContextRec::kVertical_PreMatrixScale, |
| &scale, &skTransform, nullptr, nullptr, nullptr); |
| fTransform = MatrixToCGAffineTransform(skTransform); |
| // CGAffineTransformInvert documents that if the transform is non-invertible it will return the |
| // passed transform unchanged. It does so, but then also prints a message to stdout. Avoid this. |
| if (invertible) { |
| fInvTransform = CGAffineTransformInvert(fTransform); |
| } else { |
| fInvTransform = fTransform; |
| } |
| |
| // The transform contains everything except the requested text size. |
| // Some properties, like 'trak', are based on the text size (before applying the matrix). |
| CGFloat textSize = ScalarToCG(scale.y()); |
| fCTFont = ctfont_create_exact_copy(ctFont, textSize, nullptr); |
| fCGFont.reset(CTFontCopyGraphicsFont(fCTFont.get(), nullptr)); |
| } |
| |
| CGRGBPixel* Offscreen::getCG(const SkScalerContext_Mac& context, const SkGlyph& glyph, |
| CGGlyph glyphID, size_t* rowBytesPtr, |
| bool generateA8FromLCD) { |
| if (!fRGBSpace) { |
| //It doesn't appear to matter what color space is specified. |
| //Regular blends and antialiased text are always (s*a + d*(1-a)) |
| //and subpixel antialiased text is always g=2.0. |
| fRGBSpace.reset(CGColorSpaceCreateDeviceRGB()); |
| } |
| |
| // default to kBW_Format |
| bool doAA = false; |
| bool doLCD = false; |
| |
| if (SkMask::kBW_Format != glyph.fMaskFormat) { |
| doLCD = true; |
| doAA = true; |
| } |
| |
| // FIXME: lcd smoothed un-hinted rasterization unsupported. |
| if (!generateA8FromLCD && SkMask::kA8_Format == glyph.fMaskFormat) { |
| doLCD = false; |
| doAA = true; |
| } |
| |
| // If this font might have color glyphs, disable LCD as there's no way to support it. |
| // CoreText doesn't tell us which format it ended up using, so we can't detect it. |
| // A8 will end up black on transparent, but TODO: we can detect gray and set to A8. |
| if (SkMask::kARGB32_Format == glyph.fMaskFormat) { |
| doLCD = false; |
| } |
| |
| size_t rowBytes = fSize.fWidth * sizeof(CGRGBPixel); |
| if (!fCG || fSize.fWidth < glyph.fWidth || fSize.fHeight < glyph.fHeight) { |
| if (fSize.fWidth < glyph.fWidth) { |
| fSize.fWidth = RoundSize(glyph.fWidth); |
| } |
| if (fSize.fHeight < glyph.fHeight) { |
| fSize.fHeight = RoundSize(glyph.fHeight); |
| } |
| |
| rowBytes = fSize.fWidth * sizeof(CGRGBPixel); |
| void* image = fImageStorage.reset(rowBytes * fSize.fHeight); |
| const CGImageAlphaInfo alpha = (SkMask::kARGB32_Format == glyph.fMaskFormat) |
| ? kCGImageAlphaPremultipliedFirst |
| : kCGImageAlphaNoneSkipFirst; |
| const CGBitmapInfo bitmapInfo = kCGBitmapByteOrder32Host | alpha; |
| fCG.reset(CGBitmapContextCreate(image, fSize.fWidth, fSize.fHeight, 8, |
| rowBytes, fRGBSpace.get(), bitmapInfo)); |
| |
| // Skia handles quantization and subpixel positioning, |
| // so disable quantization and enabe subpixel positioning in CG. |
| CGContextSetAllowsFontSubpixelQuantization(fCG.get(), false); |
| CGContextSetShouldSubpixelQuantizeFonts(fCG.get(), false); |
| |
| // Because CG always draws from the horizontal baseline, |
| // if there is a non-integral translation from the horizontal origin to the vertical origin, |
| // then CG cannot draw the glyph in the correct location without subpixel positioning. |
| CGContextSetAllowsFontSubpixelPositioning(fCG.get(), true); |
| CGContextSetShouldSubpixelPositionFonts(fCG.get(), true); |
| |
| CGContextSetTextDrawingMode(fCG.get(), kCGTextFill); |
| |
| // Draw black on white to create mask. (Special path exists to speed this up in CG.) |
| CGContextSetGrayFillColor(fCG.get(), 0.0f, 1.0f); |
| |
| // force our checks below to happen |
| fDoAA = !doAA; |
| fDoLCD = !doLCD; |
| |
| CGContextSetTextMatrix(fCG.get(), context.fTransform); |
| } |
| |
| if (fDoAA != doAA) { |
| CGContextSetShouldAntialias(fCG.get(), doAA); |
| fDoAA = doAA; |
| } |
| if (fDoLCD != doLCD) { |
| CGContextSetShouldSmoothFonts(fCG.get(), doLCD); |
| fDoLCD = doLCD; |
| } |
| |
| CGRGBPixel* image = (CGRGBPixel*)fImageStorage.get(); |
| // skip rows based on the glyph's height |
| image += (fSize.fHeight - glyph.fHeight) * fSize.fWidth; |
| |
| // Erase to white (or transparent black if it's a color glyph, to not composite against white). |
| uint32_t bgColor = (SkMask::kARGB32_Format != glyph.fMaskFormat) ? 0xFFFFFFFF : 0x00000000; |
| sk_memset_rect32(image, bgColor, glyph.fWidth, glyph.fHeight, rowBytes); |
| |
| float subX = 0; |
| float subY = 0; |
| if (context.fDoSubPosition) { |
| subX = SkFixedToFloat(glyph.getSubXFixed()); |
| subY = SkFixedToFloat(glyph.getSubYFixed()); |
| } |
| |
| CGPoint point = CGPointMake(-glyph.fLeft + subX, glyph.fTop + glyph.fHeight - subY); |
| // Prior to 10.10, CTFontDrawGlyphs acted like CGContextShowGlyphsAtPositions and took |
| // 'positions' which are in text space. The glyph location (in device space) must be |
| // mapped into text space, so that CG can convert it back into device space. |
| // In 10.10.1, this is handled directly in CTFontDrawGlyphs. |
| // |
| // However, in 10.10.2 color glyphs no longer rotate based on the font transform. |
| // So always make the font transform identity and place the transform on the context. |
| point = CGPointApplyAffineTransform(point, context.fInvTransform); |
| |
| CTFontDrawGlyphs(context.fCTFont.get(), &glyphID, &point, 1, fCG.get()); |
| |
| SkASSERT(rowBytesPtr); |
| *rowBytesPtr = rowBytes; |
| return image; |
| } |
| |
| unsigned SkScalerContext_Mac::generateGlyphCount(void) { |
| return fGlyphCount; |
| } |
| |
| uint16_t SkScalerContext_Mac::generateCharToGlyph(SkUnichar uni) { |
| AUTO_CG_LOCK(); |
| |
| CGGlyph cgGlyph[2]; |
| UniChar theChar[2]; // UniChar is a UTF-16 16-bit code unit. |
| |
| // Get the glyph |
| size_t numUniChar = SkUTF::ToUTF16(uni, theChar); |
| SkASSERT(sizeof(CGGlyph) <= sizeof(uint16_t)); |
| |
| // Undocumented behavior of CTFontGetGlyphsForCharacters with non-bmp code points: |
| // When a surrogate pair is detected, the glyph index used is the index of the high surrogate. |
| // It is documented that if a mapping is unavailable, the glyph will be set to 0. |
| CTFontGetGlyphsForCharacters(fCTFont.get(), theChar, cgGlyph, numUniChar); |
| return cgGlyph[0]; |
| } |
| |
| bool SkScalerContext_Mac::generateAdvance(SkGlyph* glyph) { |
| return false; |
| } |
| |
| void SkScalerContext_Mac::generateMetrics(SkGlyph* glyph) { |
| AUTO_CG_LOCK(); |
| |
| glyph->fMaskFormat = fRec.fMaskFormat; |
| |
| const CGGlyph cgGlyph = (CGGlyph) glyph->getGlyphID(); |
| glyph->zeroMetrics(); |
| |
| // The following block produces cgAdvance in CG units (pixels, y up). |
| CGSize cgAdvance; |
| CTFontGetAdvancesForGlyphs(fCTFont.get(), kCTFontOrientationHorizontal, |
| &cgGlyph, &cgAdvance, 1); |
| cgAdvance = CGSizeApplyAffineTransform(cgAdvance, fTransform); |
| glyph->fAdvanceX = CGToFloat(cgAdvance.width); |
| glyph->fAdvanceY = -CGToFloat(cgAdvance.height); |
| |
| // The following produces skBounds in SkGlyph units (pixels, y down), |
| // or returns early if skBounds would be empty. |
| SkRect skBounds; |
| |
| // Glyphs are always drawn from the horizontal origin. The caller must manually use the result |
| // of CTFontGetVerticalTranslationsForGlyphs to calculate where to draw the glyph for vertical |
| // glyphs. As a result, always get the horizontal bounds of a glyph and translate it if the |
| // glyph is vertical. This avoids any diagreement between the various means of retrieving |
| // vertical metrics. |
| { |
| // CTFontGetBoundingRectsForGlyphs produces cgBounds in CG units (pixels, y up). |
| CGRect cgBounds; |
| CTFontGetBoundingRectsForGlyphs(fCTFont.get(), kCTFontOrientationHorizontal, |
| &cgGlyph, &cgBounds, 1); |
| cgBounds = CGRectApplyAffineTransform(cgBounds, fTransform); |
| |
| // BUG? |
| // 0x200B (zero-advance space) seems to return a huge (garbage) bounds, when |
| // it should be empty. So, if we see a zero-advance, we check if it has an |
| // empty path or not, and if so, we jam the bounds to 0. Hopefully a zero-advance |
| // is rare, so we won't incur a big performance cost for this extra check. |
| if (0 == cgAdvance.width && 0 == cgAdvance.height) { |
| SkUniqueCFRef<CGPathRef> path(CTFontCreatePathForGlyph(fCTFont.get(), cgGlyph,nullptr)); |
| if (!path || CGPathIsEmpty(path.get())) { |
| return; |
| } |
| } |
| |
| if (CGRectIsEmpty_inline(cgBounds)) { |
| return; |
| } |
| |
| // Convert cgBounds to SkGlyph units (pixels, y down). |
| skBounds = SkRect::MakeXYWH(cgBounds.origin.x, -cgBounds.origin.y - cgBounds.size.height, |
| cgBounds.size.width, cgBounds.size.height); |
| } |
| |
| // Currently the bounds are based on being rendered at (0,0). |
| // The top left must not move, since that is the base from which subpixel positioning is offset. |
| if (fDoSubPosition) { |
| skBounds.fRight += SkFixedToFloat(glyph->getSubXFixed()); |
| skBounds.fBottom += SkFixedToFloat(glyph->getSubYFixed()); |
| } |
| |
| // We're trying to pack left and top into int16_t, |
| // and width and height into uint16_t, after outsetting by 1. |
| if (!SkRect::MakeXYWH(-32767, -32767, 65535, 65535).contains(skBounds)) { |
| return; |
| } |
| |
| SkIRect skIBounds; |
| skBounds.roundOut(&skIBounds); |
| // Expand the bounds by 1 pixel, to give CG room for anti-aliasing. |
| // Note that this outset is to allow room for LCD smoothed glyphs. However, the correct outset |
| // is not currently known, as CG dilates the outlines by some percentage. |
| // Note that if this context is A8 and not back-forming from LCD, there is no need to outset. |
| skIBounds.outset(1, 1); |
| glyph->fLeft = SkToS16(skIBounds.fLeft); |
| glyph->fTop = SkToS16(skIBounds.fTop); |
| glyph->fWidth = SkToU16(skIBounds.width()); |
| glyph->fHeight = SkToU16(skIBounds.height()); |
| } |
| |
| #include "SkColorData.h" |
| |
| static constexpr uint8_t sk_pow2_table(size_t i) { |
| return SkToU8(((i * i + 128) / 255)); |
| } |
| |
| /** |
| * This will invert the gamma applied by CoreGraphics, so we can get linear |
| * values. |
| * |
| * CoreGraphics obscurely defaults to 2.0 as the subpixel coverage gamma value. |
| * The color space used does not appear to affect this choice. |
| */ |
| static constexpr auto gLinearCoverageFromCGLCDValue = SkMakeArray<256>(sk_pow2_table); |
| |
| static void cgpixels_to_bits(uint8_t dst[], const CGRGBPixel src[], int count) { |
| while (count > 0) { |
| uint8_t mask = 0; |
| for (int i = 7; i >= 0; --i) { |
| mask |= ((CGRGBPixel_getAlpha(*src++) >> 7) ^ 0x1) << i; |
| if (0 == --count) { |
| break; |
| } |
| } |
| *dst++ = mask; |
| } |
| } |
| |
| template<bool APPLY_PREBLEND> |
| static inline uint8_t rgb_to_a8(CGRGBPixel rgb, const uint8_t* table8) { |
| U8CPU r = 0xFF - ((rgb >> 16) & 0xFF); |
| U8CPU g = 0xFF - ((rgb >> 8) & 0xFF); |
| U8CPU b = 0xFF - ((rgb >> 0) & 0xFF); |
| U8CPU lum = sk_apply_lut_if<APPLY_PREBLEND>(SkComputeLuminance(r, g, b), table8); |
| #if SK_SHOW_TEXT_BLIT_COVERAGE |
| lum = SkTMax(lum, (U8CPU)0x30); |
| #endif |
| return lum; |
| } |
| template<bool APPLY_PREBLEND> |
| static void rgb_to_a8(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, |
| const SkGlyph& glyph, const uint8_t* table8) { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| uint8_t* SK_RESTRICT dst = (uint8_t*)glyph.fImage; |
| |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int i = 0; i < width; ++i) { |
| dst[i] = rgb_to_a8<APPLY_PREBLEND>(cgPixels[i], table8); |
| } |
| cgPixels = SkTAddOffset<const CGRGBPixel>(cgPixels, cgRowBytes); |
| dst = SkTAddOffset<uint8_t>(dst, dstRB); |
| } |
| } |
| |
| template<bool APPLY_PREBLEND> |
| static inline uint16_t rgb_to_lcd16(CGRGBPixel rgb, const uint8_t* tableR, |
| const uint8_t* tableG, |
| const uint8_t* tableB) { |
| U8CPU r = sk_apply_lut_if<APPLY_PREBLEND>(0xFF - ((rgb >> 16) & 0xFF), tableR); |
| U8CPU g = sk_apply_lut_if<APPLY_PREBLEND>(0xFF - ((rgb >> 8) & 0xFF), tableG); |
| U8CPU b = sk_apply_lut_if<APPLY_PREBLEND>(0xFF - ((rgb >> 0) & 0xFF), tableB); |
| #if SK_SHOW_TEXT_BLIT_COVERAGE |
| r = SkTMax(r, (U8CPU)0x30); |
| g = SkTMax(g, (U8CPU)0x30); |
| b = SkTMax(b, (U8CPU)0x30); |
| #endif |
| return SkPack888ToRGB16(r, g, b); |
| } |
| template<bool APPLY_PREBLEND> |
| static void rgb_to_lcd16(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, const SkGlyph& glyph, |
| const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| uint16_t* SK_RESTRICT dst = (uint16_t*)glyph.fImage; |
| |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int i = 0; i < width; i++) { |
| dst[i] = rgb_to_lcd16<APPLY_PREBLEND>(cgPixels[i], tableR, tableG, tableB); |
| } |
| cgPixels = SkTAddOffset<const CGRGBPixel>(cgPixels, cgRowBytes); |
| dst = SkTAddOffset<uint16_t>(dst, dstRB); |
| } |
| } |
| |
| static SkPMColor cgpixels_to_pmcolor(CGRGBPixel rgb) { |
| U8CPU a = (rgb >> 24) & 0xFF; |
| U8CPU r = (rgb >> 16) & 0xFF; |
| U8CPU g = (rgb >> 8) & 0xFF; |
| U8CPU b = (rgb >> 0) & 0xFF; |
| #if SK_SHOW_TEXT_BLIT_COVERAGE |
| a = SkTMax(a, (U8CPU)0x30); |
| #endif |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| void SkScalerContext_Mac::generateImage(const SkGlyph& glyph) { |
| CGGlyph cgGlyph = SkTo<CGGlyph>(glyph.getGlyphID()); |
| |
| // FIXME: lcd smoothed un-hinted rasterization unsupported. |
| bool requestSmooth = fRec.getHinting() != kNo_SkFontHinting; |
| |
| // Draw the glyph |
| size_t cgRowBytes; |
| CGRGBPixel* cgPixels = fOffscreen.getCG(*this, glyph, cgGlyph, &cgRowBytes, requestSmooth); |
| if (cgPixels == nullptr) { |
| return; |
| } |
| |
| // Fix the glyph |
| if ((glyph.fMaskFormat == SkMask::kLCD16_Format) || |
| (glyph.fMaskFormat == SkMask::kA8_Format |
| && requestSmooth |
| && smooth_behavior() != SmoothBehavior::none)) |
| { |
| const uint8_t* linear = gLinearCoverageFromCGLCDValue.data(); |
| |
| //Note that the following cannot really be integrated into the |
| //pre-blend, since we may not be applying the pre-blend; when we aren't |
| //applying the pre-blend it means that a filter wants linear anyway. |
| //Other code may also be applying the pre-blend, so we'd need another |
| //one with this and one without. |
| CGRGBPixel* addr = cgPixels; |
| for (int y = 0; y < glyph.fHeight; ++y) { |
| for (int x = 0; x < glyph.fWidth; ++x) { |
| int r = (addr[x] >> 16) & 0xFF; |
| int g = (addr[x] >> 8) & 0xFF; |
| int b = (addr[x] >> 0) & 0xFF; |
| addr[x] = (linear[r] << 16) | (linear[g] << 8) | linear[b]; |
| } |
| addr = SkTAddOffset<CGRGBPixel>(addr, cgRowBytes); |
| } |
| } |
| |
| // Convert glyph to mask |
| switch (glyph.fMaskFormat) { |
| case SkMask::kLCD16_Format: { |
| if (fPreBlend.isApplicable()) { |
| rgb_to_lcd16<true>(cgPixels, cgRowBytes, glyph, |
| fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); |
| } else { |
| rgb_to_lcd16<false>(cgPixels, cgRowBytes, glyph, |
| fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); |
| } |
| } break; |
| case SkMask::kA8_Format: { |
| if (fPreBlend.isApplicable()) { |
| rgb_to_a8<true>(cgPixels, cgRowBytes, glyph, fPreBlend.fG); |
| } else { |
| rgb_to_a8<false>(cgPixels, cgRowBytes, glyph, fPreBlend.fG); |
| } |
| } break; |
| case SkMask::kBW_Format: { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| uint8_t* dst = (uint8_t*)glyph.fImage; |
| for (int y = 0; y < glyph.fHeight; y++) { |
| cgpixels_to_bits(dst, cgPixels, width); |
| cgPixels = SkTAddOffset<CGRGBPixel>(cgPixels, cgRowBytes); |
| dst = SkTAddOffset<uint8_t>(dst, dstRB); |
| } |
| } break; |
| case SkMask::kARGB32_Format: { |
| const int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| SkPMColor* dst = (SkPMColor*)glyph.fImage; |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int x = 0; x < width; ++x) { |
| dst[x] = cgpixels_to_pmcolor(cgPixels[x]); |
| } |
| cgPixels = SkTAddOffset<CGRGBPixel>(cgPixels, cgRowBytes); |
| dst = SkTAddOffset<SkPMColor>(dst, dstRB); |
| } |
| } break; |
| default: |
| SkDEBUGFAIL("unexpected mask format"); |
| break; |
| } |
| } |
| |
| /* |
| * Our subpixel resolution is only 2 bits in each direction, so a scale of 4 |
| * seems sufficient, and possibly even correct, to allow the hinted outline |
| * to be subpixel positioned. |
| */ |
| #define kScaleForSubPixelPositionHinting (4.0f) |
| |
| bool SkScalerContext_Mac::generatePath(SkGlyphID glyph, SkPath* path) { |
| AUTO_CG_LOCK(); |
| |
| SkScalar scaleX = SK_Scalar1; |
| SkScalar scaleY = SK_Scalar1; |
| |
| CGAffineTransform xform = fTransform; |
| /* |
| * For subpixel positioning, we want to return an unhinted outline, so it |
| * can be positioned nicely at fractional offsets. However, we special-case |
| * if the baseline of the (horizontal) text is axis-aligned. In those cases |
| * we want to retain hinting in the direction orthogonal to the baseline. |
| * e.g. for horizontal baseline, we want to retain hinting in Y. |
| * The way we remove hinting is to scale the font by some value (4) in that |
| * direction, ask for the path, and then scale the path back down. |
| */ |
| if (fDoSubPosition) { |
| // start out by assuming that we want no hining in X and Y |
| scaleX = scaleY = kScaleForSubPixelPositionHinting; |
| // now see if we need to restore hinting for axis-aligned baselines |
| switch (this->computeAxisAlignmentForHText()) { |
| case kX_SkAxisAlignment: |
| scaleY = SK_Scalar1; // want hinting in the Y direction |
| break; |
| case kY_SkAxisAlignment: |
| scaleX = SK_Scalar1; // want hinting in the X direction |
| break; |
| default: |
| break; |
| } |
| |
| CGAffineTransform scale(CGAffineTransformMakeScale(ScalarToCG(scaleX), ScalarToCG(scaleY))); |
| xform = CGAffineTransformConcat(fTransform, scale); |
| } |
| |
| CGGlyph cgGlyph = SkTo<CGGlyph>(glyph); |
| SkUniqueCFRef<CGPathRef> cgPath(CTFontCreatePathForGlyph(fCTFont.get(), cgGlyph, &xform)); |
| |
| path->reset(); |
| if (!cgPath) { |
| return false; |
| } |
| |
| CGPathApply(cgPath.get(), path, SkScalerContext_Mac::CTPathElement); |
| if (fDoSubPosition) { |
| SkMatrix m; |
| m.setScale(SkScalarInvert(scaleX), SkScalarInvert(scaleY)); |
| path->transform(m); |
| } |
| return true; |
| } |
| |
| void SkScalerContext_Mac::generateFontMetrics(SkFontMetrics* metrics) { |
| if (nullptr == metrics) { |
| return; |
| } |
| |
| AUTO_CG_LOCK(); |
| |
| CGRect theBounds = CTFontGetBoundingBox(fCTFont.get()); |
| |
| metrics->fTop = CGToScalar(-CGRectGetMaxY_inline(theBounds)); |
| metrics->fAscent = CGToScalar(-CTFontGetAscent(fCTFont.get())); |
| metrics->fDescent = CGToScalar( CTFontGetDescent(fCTFont.get())); |
| metrics->fBottom = CGToScalar(-CGRectGetMinY_inline(theBounds)); |
| metrics->fLeading = CGToScalar( CTFontGetLeading(fCTFont.get())); |
| metrics->fAvgCharWidth = CGToScalar( CGRectGetWidth_inline(theBounds)); |
| metrics->fXMin = CGToScalar( CGRectGetMinX_inline(theBounds)); |
| metrics->fXMax = CGToScalar( CGRectGetMaxX_inline(theBounds)); |
| metrics->fMaxCharWidth = metrics->fXMax - metrics->fXMin; |
| metrics->fXHeight = CGToScalar( CTFontGetXHeight(fCTFont.get())); |
| metrics->fCapHeight = CGToScalar( CTFontGetCapHeight(fCTFont.get())); |
| metrics->fUnderlineThickness = CGToScalar( CTFontGetUnderlineThickness(fCTFont.get())); |
| metrics->fUnderlinePosition = -CGToScalar( CTFontGetUnderlinePosition(fCTFont.get())); |
| |
| metrics->fFlags = 0; |
| metrics->fFlags |= SkFontMetrics::kUnderlineThicknessIsValid_Flag; |
| metrics->fFlags |= SkFontMetrics::kUnderlinePositionIsValid_Flag; |
| |
| // See https://bugs.chromium.org/p/skia/issues/detail?id=6203 |
| // At least on 10.12.3 with memory based fonts the x-height is always 0.6666 of the ascent and |
| // the cap-height is always 0.8888 of the ascent. It appears that the values from the 'OS/2' |
| // table are read, but then overwritten if the font is not a system font. As a result, if there |
| // is a valid 'OS/2' table available use the values from the table if they aren't too strange. |
| struct OS2HeightMetrics { |
| SK_OT_SHORT sxHeight; |
| SK_OT_SHORT sCapHeight; |
| } heights; |
| size_t bytesRead = this->getTypeface()->getTableData( |
| SkTEndian_SwapBE32(SkOTTableOS2::TAG), offsetof(SkOTTableOS2, version.v2.sxHeight), |
| sizeof(heights), &heights); |
| if (bytesRead == sizeof(heights)) { |
| // 'fontSize' is correct because the entire resolved size is set by the constructor. |
| CGFloat fontSize = CTFontGetSize(this->fCTFont.get()); |
| unsigned upem = CTFontGetUnitsPerEm(this->fCTFont.get()); |
| unsigned maxSaneHeight = upem * 2; |
| uint16_t xHeight = SkEndian_SwapBE16(heights.sxHeight); |
| if (xHeight && xHeight < maxSaneHeight) { |
| metrics->fXHeight = CGToScalar(xHeight * fontSize / upem); |
| } |
| uint16_t capHeight = SkEndian_SwapBE16(heights.sCapHeight); |
| if (capHeight && capHeight < maxSaneHeight) { |
| metrics->fCapHeight = CGToScalar(capHeight * fontSize / upem); |
| } |
| } |
| } |
| |
| void SkScalerContext_Mac::CTPathElement(void *info, const CGPathElement *element) { |
| SkPath* skPath = (SkPath*)info; |
| |
| // Process the path element |
| switch (element->type) { |
| case kCGPathElementMoveToPoint: |
| skPath->moveTo(element->points[0].x, -element->points[0].y); |
| break; |
| |
| case kCGPathElementAddLineToPoint: |
| skPath->lineTo(element->points[0].x, -element->points[0].y); |
| break; |
| |
| case kCGPathElementAddQuadCurveToPoint: |
| skPath->quadTo(element->points[0].x, -element->points[0].y, |
| element->points[1].x, -element->points[1].y); |
| break; |
| |
| case kCGPathElementAddCurveToPoint: |
| skPath->cubicTo(element->points[0].x, -element->points[0].y, |
| element->points[1].x, -element->points[1].y, |
| element->points[2].x, -element->points[2].y); |
| break; |
| |
| case kCGPathElementCloseSubpath: |
| skPath->close(); |
| break; |
| |
| default: |
| SkDEBUGFAIL("Unknown path element!"); |
| break; |
| } |
| } |
| |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // Returns nullptr on failure |
| // Call must still manage its ownership of provider |
| static sk_sp<SkTypeface> create_from_dataProvider(SkUniqueCFRef<CGDataProviderRef> provider, |
| int ttcIndex) { |
| if (ttcIndex != 0) { |
| return nullptr; |
| } |
| SkUniqueCFRef<CGFontRef> cg(CGFontCreateWithDataProvider(provider.get())); |
| if (!cg) { |
| return nullptr; |
| } |
| SkUniqueCFRef<CTFontRef> ct(CTFontCreateWithGraphicsFont(cg.get(), 0, nullptr, nullptr)); |
| if (!ct) { |
| return nullptr; |
| } |
| return create_from_CTFontRef(std::move(ct), nullptr, true); |
| } |
| |
| // Web fonts added to the CTFont registry do not return their character set. |
| // Iterate through the font in this case. The existing caller caches the result, |
| // so the performance impact isn't too bad. |
| static void populate_glyph_to_unicode_slow(CTFontRef ctFont, CFIndex glyphCount, |
| SkUnichar* out) { |
| sk_bzero(out, glyphCount * sizeof(SkUnichar)); |
| UniChar unichar = 0; |
| while (glyphCount > 0) { |
| CGGlyph glyph; |
| if (CTFontGetGlyphsForCharacters(ctFont, &unichar, &glyph, 1)) { |
| if (out[glyph] != 0) { |
| out[glyph] = unichar; |
| --glyphCount; |
| } |
| } |
| if (++unichar == 0) { |
| break; |
| } |
| } |
| } |
| |
| // Construct Glyph to Unicode table. |
| // Unicode code points that require conjugate pairs in utf16 are not |
| // supported. |
| static void populate_glyph_to_unicode(CTFontRef ctFont, CFIndex glyphCount, |
| SkUnichar* glyphToUnicode) { |
| sk_bzero(glyphToUnicode, sizeof(SkUnichar) * glyphCount); |
| SkUniqueCFRef<CFCharacterSetRef> charSet(CTFontCopyCharacterSet(ctFont)); |
| if (!charSet) { |
| populate_glyph_to_unicode_slow(ctFont, glyphCount, glyphToUnicode); |
| return; |
| } |
| |
| SkUniqueCFRef<CFDataRef> bitmap( |
| CFCharacterSetCreateBitmapRepresentation(nullptr, charSet.get())); |
| if (!bitmap) { |
| return; |
| } |
| CFIndex length = CFDataGetLength(bitmap.get()); |
| if (!length) { |
| return; |
| } |
| if (length > 8192) { |
| // TODO: Add support for Unicode above 0xFFFF |
| // Consider only the BMP portion of the Unicode character points. |
| // The bitmap may contain other planes, up to plane 16. |
| // See http://developer.apple.com/library/ios/#documentation/CoreFoundation/Reference/CFCharacterSetRef/Reference/reference.html |
| length = 8192; |
| } |
| const UInt8* bits = CFDataGetBytePtr(bitmap.get()); |
| sk_bzero(glyphToUnicode, glyphCount * sizeof(SkUnichar)); |
| for (int i = 0; i < length; i++) { |
| int mask = bits[i]; |
| if (!mask) { |
| continue; |
| } |
| for (int j = 0; j < 8; j++) { |
| CGGlyph glyph; |
| UniChar unichar = static_cast<UniChar>((i << 3) + j); |
| if (mask & (1 << j) && CTFontGetGlyphsForCharacters(ctFont, &unichar, &glyph, 1)) { |
| glyphToUnicode[glyph] = unichar; |
| } |
| } |
| } |
| } |
| |
| /** Assumes src and dst are not nullptr. */ |
| static void CFStringToSkString(CFStringRef src, SkString* dst) { |
| // Reserve enough room for the worst-case string, |
| // plus 1 byte for the trailing null. |
| CFIndex length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(src), |
| kCFStringEncodingUTF8) + 1; |
| dst->resize(length); |
| CFStringGetCString(src, dst->writable_str(), length, kCFStringEncodingUTF8); |
| // Resize to the actual UTF-8 length used, stripping the null character. |
| dst->resize(strlen(dst->c_str())); |
| } |
| |
| void SkTypeface_Mac::getGlyphToUnicodeMap(SkUnichar* dstArray) const { |
| AUTO_CG_LOCK(); |
| SkUniqueCFRef<CTFontRef> ctFont = |
| ctfont_create_exact_copy(fFontRef.get(), CTFontGetUnitsPerEm(fFontRef.get()), nullptr); |
| CFIndex glyphCount = CTFontGetGlyphCount(ctFont.get()); |
| populate_glyph_to_unicode(ctFont.get(), glyphCount, dstArray); |
| } |
| |
| std::unique_ptr<SkAdvancedTypefaceMetrics> SkTypeface_Mac::onGetAdvancedMetrics() const { |
| |
| AUTO_CG_LOCK(); |
| |
| SkUniqueCFRef<CTFontRef> ctFont = |
| ctfont_create_exact_copy(fFontRef.get(), CTFontGetUnitsPerEm(fFontRef.get()), nullptr); |
| |
| std::unique_ptr<SkAdvancedTypefaceMetrics> info(new SkAdvancedTypefaceMetrics); |
| |
| { |
| SkUniqueCFRef<CFStringRef> fontName(CTFontCopyPostScriptName(ctFont.get())); |
| if (fontName.get()) { |
| CFStringToSkString(fontName.get(), &info->fPostScriptName); |
| info->fFontName = info->fPostScriptName; |
| } |
| } |
| |
| // In 10.10 and earlier, CTFontCopyVariationAxes and CTFontCopyVariation do not work when |
| // applied to fonts which started life with CGFontCreateWithDataProvider (they simply always |
| // return nullptr). As a result, we are limited to CGFontCopyVariationAxes and |
| // CGFontCopyVariations here until support for 10.10 and earlier is removed. |
| SkUniqueCFRef<CGFontRef> cgFont(CTFontCopyGraphicsFont(ctFont.get(), nullptr)); |
| if (cgFont) { |
| SkUniqueCFRef<CFArrayRef> cgAxes(CGFontCopyVariationAxes(cgFont.get())); |
| if (cgAxes && CFArrayGetCount(cgAxes.get()) > 0) { |
| info->fFlags |= SkAdvancedTypefaceMetrics::kMultiMaster_FontFlag; |
| } |
| } |
| |
| SkOTTableOS2_V4::Type fsType; |
| if (sizeof(fsType) == this->getTableData(SkTEndian_SwapBE32(SkOTTableOS2::TAG), |
| offsetof(SkOTTableOS2_V4, fsType), |
| sizeof(fsType), |
| &fsType)) { |
| SkOTUtils::SetAdvancedTypefaceFlags(fsType, info.get()); |
| } |
| |
| // If it's not a truetype font, mark it as 'other'. Assume that TrueType |
| // fonts always have both glyf and loca tables. At the least, this is what |
| // sfntly needs to subset the font. CTFontCopyAttribute() does not always |
| // succeed in determining this directly. |
| if (!this->getTableSize('glyf') || !this->getTableSize('loca')) { |
| return info; |
| } |
| |
| info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; |
| CTFontSymbolicTraits symbolicTraits = CTFontGetSymbolicTraits(ctFont.get()); |
| if (symbolicTraits & kCTFontMonoSpaceTrait) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; |
| } |
| if (symbolicTraits & kCTFontItalicTrait) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; |
| } |
| CTFontStylisticClass stylisticClass = symbolicTraits & kCTFontClassMaskTrait; |
| if (stylisticClass >= kCTFontOldStyleSerifsClass && stylisticClass <= kCTFontSlabSerifsClass) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; |
| } else if (stylisticClass & kCTFontScriptsClass) { |
| info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; |
| } |
| info->fItalicAngle = (int16_t) CTFontGetSlantAngle(ctFont.get()); |
| info->fAscent = (int16_t) CTFontGetAscent(ctFont.get()); |
| info->fDescent = (int16_t) CTFontGetDescent(ctFont.get()); |
| info->fCapHeight = (int16_t) CTFontGetCapHeight(ctFont.get()); |
| CGRect bbox = CTFontGetBoundingBox(ctFont.get()); |
| |
| SkRect r; |
| r.set( CGToScalar(CGRectGetMinX_inline(bbox)), // Left |
| CGToScalar(CGRectGetMaxY_inline(bbox)), // Top |
| CGToScalar(CGRectGetMaxX_inline(bbox)), // Right |
| CGToScalar(CGRectGetMinY_inline(bbox))); // Bottom |
| |
| r.roundOut(&(info->fBBox)); |
| |
| // Figure out a good guess for StemV - Min width of i, I, !, 1. |
| // This probably isn't very good with an italic font. |
| int16_t min_width = SHRT_MAX; |
| info->fStemV = 0; |
| static const UniChar stem_chars[] = {'i', 'I', '!', '1'}; |
| const size_t count = sizeof(stem_chars) / sizeof(stem_chars[0]); |
| CGGlyph glyphs[count]; |
| CGRect boundingRects[count]; |
| if (CTFontGetGlyphsForCharacters(ctFont.get(), stem_chars, glyphs, count)) { |
| CTFontGetBoundingRectsForGlyphs(ctFont.get(), kCTFontOrientationHorizontal, |
| glyphs, boundingRects, count); |
| for (size_t i = 0; i < count; i++) { |
| int16_t width = (int16_t) boundingRects[i].size.width; |
| if (width > 0 && width < min_width) { |
| min_width = width; |
| info->fStemV = min_width; |
| } |
| } |
| } |
| return info; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static SK_SFNT_ULONG get_font_type_tag(CTFontRef ctFont) { |
| SkUniqueCFRef<CFNumberRef> fontFormatRef( |
| static_cast<CFNumberRef>(CTFontCopyAttribute(ctFont, kCTFontFormatAttribute))); |
| if (!fontFormatRef) { |
| return 0; |
| } |
| |
| SInt32 fontFormatValue; |
| if (!CFNumberGetValue(fontFormatRef.get(), kCFNumberSInt32Type, &fontFormatValue)) { |
| return 0; |
| } |
| |
| switch (fontFormatValue) { |
| case kCTFontFormatOpenTypePostScript: |
| return SkSFNTHeader::fontType_OpenTypeCFF::TAG; |
| case kCTFontFormatOpenTypeTrueType: |
| return SkSFNTHeader::fontType_WindowsTrueType::TAG; |
| case kCTFontFormatTrueType: |
| return SkSFNTHeader::fontType_MacTrueType::TAG; |
| case kCTFontFormatPostScript: |
| return SkSFNTHeader::fontType_PostScript::TAG; |
| case kCTFontFormatBitmap: |
| return SkSFNTHeader::fontType_MacTrueType::TAG; |
| case kCTFontFormatUnrecognized: |
| default: |
| return 0; |
| } |
| } |
| |
| std::unique_ptr<SkStreamAsset> SkTypeface_Mac::onOpenStream(int* ttcIndex) const { |
| SK_SFNT_ULONG fontType = get_font_type_tag(fFontRef.get()); |
| |
| // get table tags |
| int numTables = this->countTables(); |
| SkTDArray<SkFontTableTag> tableTags; |
| tableTags.setCount(numTables); |
| this->getTableTags(tableTags.begin()); |
| |
| // CT seems to be unreliable in being able to obtain the type, |
| // even if all we want is the first four bytes of the font resource. |
| // Just the presence of the FontForge 'FFTM' table seems to throw it off. |
| if (fontType == 0) { |
| fontType = SkSFNTHeader::fontType_WindowsTrueType::TAG; |
| |
| // see https://skbug.com/7630#c7 |
| bool couldBeCFF = false; |
| constexpr SkFontTableTag CFFTag = SkSetFourByteTag('C', 'F', 'F', ' '); |
| constexpr SkFontTableTag CFF2Tag = SkSetFourByteTag('C', 'F', 'F', '2'); |
| for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { |
| if (CFFTag == tableTags[tableIndex] || CFF2Tag == tableTags[tableIndex]) { |
| couldBeCFF = true; |
| } |
| } |
| if (couldBeCFF) { |
| fontType = SkSFNTHeader::fontType_OpenTypeCFF::TAG; |
| } |
| } |
| |
| // Sometimes CoreGraphics incorrectly thinks a font is kCTFontFormatPostScript. |
| // It is exceedingly unlikely that this is the case, so double check |
| // (see https://crbug.com/809763 ). |
| if (fontType == SkSFNTHeader::fontType_PostScript::TAG) { |
| // see if there are any required 'typ1' tables (see Adobe Technical Note #5180) |
| bool couldBeTyp1 = false; |
| constexpr SkFontTableTag TYPE1Tag = SkSetFourByteTag('T', 'Y', 'P', '1'); |
| constexpr SkFontTableTag CIDTag = SkSetFourByteTag('C', 'I', 'D', ' '); |
| for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { |
| if (TYPE1Tag == tableTags[tableIndex] || CIDTag == tableTags[tableIndex]) { |
| couldBeTyp1 = true; |
| } |
| } |
| if (!couldBeTyp1) { |
| fontType = SkSFNTHeader::fontType_OpenTypeCFF::TAG; |
| } |
| } |
| |
| // get the table sizes and accumulate the total size of the font |
| SkTDArray<size_t> tableSizes; |
| size_t totalSize = sizeof(SkSFNTHeader) + sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables; |
| for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { |
| size_t tableSize = this->getTableSize(tableTags[tableIndex]); |
| totalSize += (tableSize + 3) & ~3; |
| *tableSizes.append() = tableSize; |
| } |
| |
| // reserve memory for stream, and zero it (tables must be zero padded) |
| std::unique_ptr<SkStreamAsset> stream(new SkMemoryStream(totalSize)); |
| char* dataStart = (char*)stream->getMemoryBase(); |
| sk_bzero(dataStart, totalSize); |
| char* dataPtr = dataStart; |
| |
| // compute font header entries |
| uint16_t entrySelector = 0; |
| uint16_t searchRange = 1; |
| while (searchRange < numTables >> 1) { |
| entrySelector++; |
| searchRange <<= 1; |
| } |
| searchRange <<= 4; |
| uint16_t rangeShift = (numTables << 4) - searchRange; |
| |
| // write font header |
| SkSFNTHeader* header = (SkSFNTHeader*)dataPtr; |
| header->fontType = fontType; |
| header->numTables = SkEndian_SwapBE16(numTables); |
| header->searchRange = SkEndian_SwapBE16(searchRange); |
| header->entrySelector = SkEndian_SwapBE16(entrySelector); |
| header->rangeShift = SkEndian_SwapBE16(rangeShift); |
| dataPtr += sizeof(SkSFNTHeader); |
| |
| // write tables |
| SkSFNTHeader::TableDirectoryEntry* entry = (SkSFNTHeader::TableDirectoryEntry*)dataPtr; |
| dataPtr += sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables; |
| for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { |
| size_t tableSize = tableSizes[tableIndex]; |
| this->getTableData(tableTags[tableIndex], 0, tableSize, dataPtr); |
| entry->tag = SkEndian_SwapBE32(tableTags[tableIndex]); |
| entry->checksum = SkEndian_SwapBE32(SkOTUtils::CalcTableChecksum((SK_OT_ULONG*)dataPtr, |
| tableSize)); |
| entry->offset = SkEndian_SwapBE32(SkToU32(dataPtr - dataStart)); |
| entry->logicalLength = SkEndian_SwapBE32(SkToU32(tableSize)); |
| |
| dataPtr += (tableSize + 3) & ~3; |
| ++entry; |
| } |
| |
| *ttcIndex = 0; |
| return stream; |
| } |
| |
| struct NonDefaultAxesContext { |
| SkFixed* axisValue; |
| CFArrayRef cgAxes; |
| }; |
| static void set_non_default_axes(CFTypeRef key, CFTypeRef value, void* context) { |
| NonDefaultAxesContext* self = static_cast<NonDefaultAxesContext*>(context); |
| |
| if (CFGetTypeID(key) != CFStringGetTypeID() || CFGetTypeID(value) != CFNumberGetTypeID()) { |
| return; |
| } |
| |
| // The key is a CFString which is a string from the 'name' table. |
| // Search the cgAxes for an axis with this name, and use its index to store the value. |
| CFIndex keyIndex = -1; |
| CFStringRef keyString = static_cast<CFStringRef>(key); |
| for (CFIndex i = 0; i < CFArrayGetCount(self->cgAxes); ++i) { |
| CFTypeRef cgAxis = CFArrayGetValueAtIndex(self->cgAxes, i); |
| if (CFGetTypeID(cgAxis) != CFDictionaryGetTypeID()) { |
| continue; |
| } |
| |
| CFDictionaryRef cgAxisDict = static_cast<CFDictionaryRef>(cgAxis); |
| CFTypeRef cgAxisName = CFDictionaryGetValue(cgAxisDict, kCGFontVariationAxisName); |
| if (!cgAxisName || CFGetTypeID(cgAxisName) != CFStringGetTypeID()) { |
| continue; |
| } |
| CFStringRef cgAxisNameString = static_cast<CFStringRef>(cgAxisName); |
| if (CFStringCompare(keyString, cgAxisNameString, 0) == kCFCompareEqualTo) { |
| keyIndex = i; |
| break; |
| } |
| } |
| if (keyIndex == -1) { |
| return; |
| } |
| |
| CFNumberRef valueNumber = static_cast<CFNumberRef>(value); |
| double valueDouble; |
| if (!CFNumberGetValue(valueNumber, kCFNumberDoubleType, &valueDouble) || |
| valueDouble < SkFixedToDouble(SK_FixedMin) || SkFixedToDouble(SK_FixedMax) < valueDouble) |
| { |
| return; |
| } |
| self->axisValue[keyIndex] = SkDoubleToFixed(valueDouble); |
| } |
| static bool get_variations(CTFontRef ctFont, CFIndex* cgAxisCount, |
| SkAutoSTMalloc<4, SkFixed>* axisValues) |
| { |
| // In 10.10 and earlier, CTFontCopyVariationAxes and CTFontCopyVariation do not work when |
| // applied to fonts which started life with CGFontCreateWithDataProvider (they simply always |
| // return nullptr). As a result, we are limited to CGFontCopyVariationAxes and |
| // CGFontCopyVariations here until support for 10.10 and earlier is removed. |
| SkUniqueCFRef<CGFontRef> cgFont(CTFontCopyGraphicsFont(ctFont, nullptr)); |
| if (!cgFont) { |
| return false; |
| } |
| |
| SkUniqueCFRef<CFDictionaryRef> cgVariations(CGFontCopyVariations(cgFont.get())); |
| // If a font has no variations CGFontCopyVariations returns nullptr (instead of an empty dict). |
| if (!cgVariations) { |
| return false; |
| } |
| |
| SkUniqueCFRef<CFArrayRef> cgAxes(CGFontCopyVariationAxes(cgFont.get())); |
| if (!cgAxes) { |
| return false; |
| } |
| *cgAxisCount = CFArrayGetCount(cgAxes.get()); |
| axisValues->reset(*cgAxisCount); |
| |
| // Set all of the axes to their default values. |
| // Fail if any default value cannot be determined. |
| for (CFIndex i = 0; i < *cgAxisCount; ++i) { |
| CFTypeRef cgAxis = CFArrayGetValueAtIndex(cgAxes.get(), i); |
| if (CFGetTypeID(cgAxis) != CFDictionaryGetTypeID()) { |
| return false; |
| } |
| |
| CFDictionaryRef cgAxisDict = static_cast<CFDictionaryRef>(cgAxis); |
| CFTypeRef axisDefaultValue = CFDictionaryGetValue(cgAxisDict, |
| kCGFontVariationAxisDefaultValue); |
| if (!axisDefaultValue || CFGetTypeID(axisDefaultValue) != CFNumberGetTypeID()) { |
| return false; |
| } |
| CFNumberRef axisDefaultValueNumber = static_cast<CFNumberRef>(axisDefaultValue); |
| double axisDefaultValueDouble; |
| if (!CFNumberGetValue(axisDefaultValueNumber, kCFNumberDoubleType, &axisDefaultValueDouble)) |
| { |
| return false; |
| } |
| if (axisDefaultValueDouble < SkFixedToDouble(SK_FixedMin) || |
| SkFixedToDouble(SK_FixedMax) < axisDefaultValueDouble) |
| { |
| return false; |
| } |
| (*axisValues)[(int)i] = SkDoubleToFixed(axisDefaultValueDouble); |
| } |
| |
| // Override the default values with the given font's stated axis values. |
| NonDefaultAxesContext c = { axisValues->get(), cgAxes.get() }; |
| CFDictionaryApplyFunction(cgVariations.get(), set_non_default_axes, &c); |
| |
| return true; |
| } |
| std::unique_ptr<SkFontData> SkTypeface_Mac::onMakeFontData() const { |
| int index; |
| std::unique_ptr<SkStreamAsset> stream(this->onOpenStream(&index)); |
| |
| CFIndex cgAxisCount; |
| SkAutoSTMalloc<4, SkFixed> axisValues; |
| if (get_variations(fFontRef.get(), &cgAxisCount, &axisValues)) { |
| return skstd::make_unique<SkFontData>(std::move(stream), index, |
| axisValues.get(), cgAxisCount); |
| } |
| return skstd::make_unique<SkFontData>(std::move(stream), index, nullptr, 0); |
| } |
| |
| /** Creates a CT variation dictionary {tag, value} from a CG variation dictionary {name, value}. */ |
| static SkUniqueCFRef<CFDictionaryRef> ct_variation_from_cg_variation(CFDictionaryRef cgVariations, |
| CFArrayRef ctAxes) { |
| |
| SkUniqueCFRef<CFMutableDictionaryRef> ctVariations( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, 0, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| CFIndex axisCount = CFArrayGetCount(ctAxes); |
| for (CFIndex i = 0; i < axisCount; ++i) { |
| CFTypeRef axisInfo = CFArrayGetValueAtIndex(ctAxes, i); |
| if (CFDictionaryGetTypeID() != CFGetTypeID(axisInfo)) { |
| return nullptr; |
| } |
| CFDictionaryRef axisInfoDict = static_cast<CFDictionaryRef>(axisInfo); |
| |
| // The assumption is that values produced by kCTFontVariationAxisNameKey and |
| // kCGFontVariationAxisName will always be equal. |
| CFTypeRef axisName = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisNameKey); |
| if (!axisName || CFGetTypeID(axisName) != CFStringGetTypeID()) { |
| return nullptr; |
| } |
| |
| CFTypeRef axisValue = CFDictionaryGetValue(cgVariations, axisName); |
| if (!axisValue || CFGetTypeID(axisValue) != CFNumberGetTypeID()) { |
| return nullptr; |
| } |
| |
| CFTypeRef axisTag = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisIdentifierKey); |
| if (!axisTag || CFGetTypeID(axisTag) != CFNumberGetTypeID()) { |
| return nullptr; |
| } |
| |
| CFDictionaryAddValue(ctVariations.get(), axisTag, axisValue); |
| } |
| return std::move(ctVariations); |
| } |
| |
| int SkTypeface_Mac::onGetVariationDesignPosition( |
| SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) const |
| { |
| // The CGFont variation data does not contain the tag. |
| |
| // CTFontCopyVariationAxes returns nullptr for CGFontCreateWithDataProvider fonts with |
| // macOS 10.10 and iOS 9 or earlier. When this happens, there is no API to provide the tag. |
| SkUniqueCFRef<CFArrayRef> ctAxes(CTFontCopyVariationAxes(fFontRef.get())); |
| if (!ctAxes) { |
| return -1; |
| } |
| CFIndex axisCount = CFArrayGetCount(ctAxes.get()); |
| if (!coordinates || coordinateCount < axisCount) { |
| return axisCount; |
| } |
| |
| // This call always returns nullptr on 10.11 and under for CGFontCreateWithDataProvider fonts. |
| // When this happens, try converting the CG variation to a CT variation. |
| // On 10.12 and later, this only returns non-default variations. |
| SkUniqueCFRef<CFDictionaryRef> ctVariations(CTFontCopyVariation(fFontRef.get())); |
| if (!ctVariations) { |
| // When 10.11 and earlier are no longer supported, the following code can be replaced with |
| // return -1 and ct_variation_from_cg_variation can be removed. |
| SkUniqueCFRef<CGFontRef> cgFont(CTFontCopyGraphicsFont(fFontRef.get(), nullptr)); |
| if (!cgFont) { |
| return -1; |
| } |
| SkUniqueCFRef<CFDictionaryRef> cgVariations(CGFontCopyVariations(cgFont.get())); |
| if (!cgVariations) { |
| return -1; |
| } |
| ctVariations = ct_variation_from_cg_variation(cgVariations.get(), ctAxes.get()); |
| if (!ctVariations) { |
| return -1; |
| } |
| } |
| |
| for (int i = 0; i < axisCount; ++i) { |
| CFTypeRef axisInfo = CFArrayGetValueAtIndex(ctAxes.get(), i); |
| if (CFDictionaryGetTypeID() != CFGetTypeID(axisInfo)) { |
| return -1; |
| } |
| CFDictionaryRef axisInfoDict = static_cast<CFDictionaryRef>(axisInfo); |
| |
| CFTypeRef tag = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisIdentifierKey); |
| if (!tag || CFGetTypeID(tag) != CFNumberGetTypeID()) { |
| return -1; |
| } |
| CFNumberRef tagNumber = static_cast<CFNumberRef>(tag); |
| int64_t tagLong; |
| if (!CFNumberGetValue(tagNumber, kCFNumberSInt64Type, &tagLong)) { |
| return -1; |
| } |
| coordinates[i].axis = tagLong; |
| |
| CGFloat variationCGFloat; |
| CFTypeRef variationValue = CFDictionaryGetValue(ctVariations.get(), tagNumber); |
| if (variationValue) { |
| if (CFGetTypeID(variationValue) != CFNumberGetTypeID()) { |
| return -1; |
| } |
| CFNumberRef variationNumber = static_cast<CFNumberRef>(variationValue); |
| if (!CFNumberGetValue(variationNumber, kCFNumberCGFloatType, &variationCGFloat)) { |
| return -1; |
| } |
| } else { |
| CFTypeRef def = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisDefaultValueKey); |
| if (!def || CFGetTypeID(def) != CFNumberGetTypeID()) { |
| return -1; |
| } |
| CFNumberRef defNumber = static_cast<CFNumberRef>(def); |
| if (!CFNumberGetValue(defNumber, kCFNumberCGFloatType, &variationCGFloat)) { |
| return -1; |
| } |
| } |
| coordinates[i].value = CGToScalar(variationCGFloat); |
| |
| } |
| return axisCount; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| int SkTypeface_Mac::onGetUPEM() const { |
| SkUniqueCFRef<CGFontRef> cgFont(CTFontCopyGraphicsFont(fFontRef.get(), nullptr)); |
| return CGFontGetUnitsPerEm(cgFont.get()); |
| } |
| |
| SkTypeface::LocalizedStrings* SkTypeface_Mac::onCreateFamilyNameIterator() const { |
| sk_sp<SkTypeface::LocalizedStrings> nameIter = |
| SkOTUtils::LocalizedStrings_NameTable::MakeForFamilyNames(*this); |
| if (!nameIter) { |
| CFStringRef cfLanguageRaw; |
| SkUniqueCFRef<CFStringRef> cfFamilyName( |
| CTFontCopyLocalizedName(fFontRef.get(), kCTFontFamilyNameKey, &cfLanguageRaw)); |
| SkUniqueCFRef<CFStringRef> cfLanguage(cfLanguageRaw); |
| |
| SkString skLanguage; |
| SkString skFamilyName; |
| if (cfLanguage) { |
| CFStringToSkString(cfLanguage.get(), &skLanguage); |
| } else { |
| skLanguage = "und"; //undetermined |
| } |
| if (cfFamilyName) { |
| CFStringToSkString(cfFamilyName.get(), &skFamilyName); |
| } |
| |
| nameIter = sk_make_sp<SkOTUtils::LocalizedStrings_SingleName>(skFamilyName, skLanguage); |
| } |
| return nameIter.release(); |
| } |
| |
| int SkTypeface_Mac::onGetTableTags(SkFontTableTag tags[]) const { |
| SkUniqueCFRef<CFArrayRef> cfArray( |
| CTFontCopyAvailableTables(fFontRef.get(), kCTFontTableOptionNoOptions)); |
| if (!cfArray) { |
| return 0; |
| } |
| int count = SkToInt(CFArrayGetCount(cfArray.get())); |
| if (tags) { |
| for (int i = 0; i < count; ++i) { |
| uintptr_t fontTag = reinterpret_cast<uintptr_t>( |
| CFArrayGetValueAtIndex(cfArray.get(), i)); |
| tags[i] = static_cast<SkFontTableTag>(fontTag); |
| } |
| } |
| return count; |
| } |
| |
| // If, as is the case with web fonts, the CTFont data isn't available, |
| // the CGFont data may work. While the CGFont may always provide the |
| // right result, leave the CTFont code path to minimize disruption. |
| static SkUniqueCFRef<CFDataRef> copy_table_from_font(CTFontRef ctFont, SkFontTableTag tag) { |
| SkUniqueCFRef<CFDataRef> data(CTFontCopyTable(ctFont, (CTFontTableTag) tag, |
| kCTFontTableOptionNoOptions)); |
| if (!data) { |
| SkUniqueCFRef<CGFontRef> cgFont(CTFontCopyGraphicsFont(ctFont, nullptr)); |
| data.reset(CGFontCopyTableForTag(cgFont.get(), tag)); |
| } |
| return data; |
| } |
| |
| size_t SkTypeface_Mac::onGetTableData(SkFontTableTag tag, size_t offset, |
| size_t length, void* dstData) const { |
| SkUniqueCFRef<CFDataRef> srcData = copy_table_from_font(fFontRef.get(), tag); |
| if (!srcData) { |
| return 0; |
| } |
| |
| size_t srcSize = CFDataGetLength(srcData.get()); |
| if (offset >= srcSize) { |
| return 0; |
| } |
| if (length > srcSize - offset) { |
| length = srcSize - offset; |
| } |
| if (dstData) { |
| memcpy(dstData, CFDataGetBytePtr(srcData.get()) + offset, length); |
| } |
| return length; |
| } |
| |
| SkScalerContext* SkTypeface_Mac::onCreateScalerContext(const SkScalerContextEffects& effects, |
| const SkDescriptor* desc) const { |
| return new SkScalerContext_Mac(sk_ref_sp(const_cast<SkTypeface_Mac*>(this)), effects, desc); |
| } |
| |
| void SkTypeface_Mac::onFilterRec(SkScalerContextRec* rec) const { |
| if (rec->fFlags & SkScalerContext::kLCD_BGROrder_Flag || |
| rec->fFlags & SkScalerContext::kLCD_Vertical_Flag) |
| { |
| rec->fMaskFormat = SkMask::kA8_Format; |
| // Render the glyphs as close as possible to what was requested. |
| // The above turns off subpixel rendering, but the user requested it. |
| // Normal hinting will cause the A8 masks to be generated from CoreGraphics subpixel masks. |
| // See comments below for more details. |
| rec->setHinting(kNormal_SkFontHinting); |
| } |
| |
| unsigned flagsWeDontSupport = SkScalerContext::kForceAutohinting_Flag | |
| SkScalerContext::kLCD_BGROrder_Flag | |
| SkScalerContext::kLCD_Vertical_Flag; |
| |
| rec->fFlags &= ~flagsWeDontSupport; |
| |
| SmoothBehavior smoothBehavior = smooth_behavior(); |
| |
| // Only two levels of hinting are supported. |
| // kNo_Hinting means avoid CoreGraphics outline dilation (smoothing). |
| // kNormal_Hinting means CoreGraphics outline dilation (smoothing) is allowed. |
| if (kSlight_SkFontHinting == rec->getHinting()) { |
| rec->setHinting(kNo_SkFontHinting); |
| } else if (kFull_SkFontHinting == rec->getHinting()) { |
| rec->setHinting(kNormal_SkFontHinting); |
| } |
| // If smoothing has no effect, don't request it. |
| if (smoothBehavior == SmoothBehavior::none) { |
| rec->setHinting(kNo_SkFontHinting); |
| } |
| |
| // FIXME: lcd smoothed un-hinted rasterization unsupported. |
| // Tracked by http://code.google.com/p/skia/issues/detail?id=915 . |
| // There is no current means to honor a request for unhinted lcd, |
| // so arbitrarilly ignore the hinting request and honor lcd. |
| |
| // Hinting and smoothing should be orthogonal, but currently they are not. |
| // CoreGraphics has no API to influence hinting. However, its lcd smoothed |
| // output is drawn from auto-dilated outlines (the amount of which is |
| // determined by AppleFontSmoothing). Its regular anti-aliased output is |
| // drawn from un-dilated outlines. |
| |
| // The behavior of Skia is as follows: |
| // [AA][no-hint]: generate AA using CoreGraphic's AA output. |
| // [AA][yes-hint]: use CoreGraphic's LCD output and reduce it to a single |
| // channel. This matches [LCD][yes-hint] in weight. |
| // [LCD][no-hint]: curently unable to honor, and must pick which to respect. |
| // Currenly side with LCD, effectively ignoring the hinting setting. |
| // [LCD][yes-hint]: generate LCD using CoreGraphic's LCD output. |
| if (rec->fMaskFormat == SkMask::kLCD16_Format) { |
| if (smoothBehavior == SmoothBehavior::subpixel) { |
| //CoreGraphics creates 555 masks for smoothed text anyway. |
| rec->fMaskFormat = SkMask::kLCD16_Format; |
| rec->setHinting(kNormal_SkFontHinting); |
| } else { |
| rec->fMaskFormat = SkMask::kA8_Format; |
| if (smoothBehavior != SmoothBehavior::none) { |
| rec->setHinting(kNormal_SkFontHinting); |
| } |
| } |
| } |
| |
| // CoreText provides no information as to whether a glyph will be color or not. |
| // Fonts may mix outlines and bitmaps, so information is needed on a glyph by glyph basis. |
| // If a font contains an 'sbix' table, consider it to be a color font, and disable lcd. |
| if (fHasColorGlyphs) { |
| rec->fMaskFormat = SkMask::kARGB32_Format; |
| } |
| |
| // Unhinted A8 masks (those not derived from LCD masks) must respect SK_GAMMA_APPLY_TO_A8. |
| // All other masks can use regular gamma. |
| if (SkMask::kA8_Format == rec->fMaskFormat && kNo_SkFontHinting == rec->getHinting()) { |
| #ifndef SK_GAMMA_APPLY_TO_A8 |
| // SRGBTODO: Is this correct? Do we want contrast boost? |
| rec->ignorePreBlend(); |
| #endif |
| } else { |
| //CoreGraphics dialates smoothed text as needed. |
| rec->setContrast(0); |
| } |
| } |
| |
| /** Takes ownership of the CFStringRef. */ |
| static const char* get_str(CFStringRef ref, SkString* str) { |
| if (nullptr == ref) { |
| return nullptr; |
| } |
| CFStringToSkString(ref, str); |
| CFRelease(ref); |
| return str->c_str(); |
| } |
| |
| void SkTypeface_Mac::onGetFamilyName(SkString* familyName) const { |
| get_str(CTFontCopyFamilyName(fFontRef.get()), familyName); |
| } |
| |
| void SkTypeface_Mac::onGetFontDescriptor(SkFontDescriptor* desc, |
| bool* isLocalStream) const { |
| SkString tmpStr; |
| |
| desc->setFamilyName(get_str(CTFontCopyFamilyName(fFontRef.get()), &tmpStr)); |
| desc->setFullName(get_str(CTFontCopyFullName(fFontRef.get()), &tmpStr)); |
| desc->setPostscriptName(get_str(CTFontCopyPostScriptName(fFontRef.get()), &tmpStr)); |
| desc->setStyle(this->fontStyle()); |
| *isLocalStream = fIsLocalStream; |
| } |
| |
| int SkTypeface_Mac::onCharsToGlyphs(const void* chars, Encoding encoding, |
| uint16_t glyphs[], int glyphCount) const |
| { |
| // Undocumented behavior of CTFontGetGlyphsForCharacters with non-bmp code points: |
| // When a surrogate pair is detected, the glyph index used is the index of the high surrogate. |
| // It is documented that if a mapping is unavailable, the glyph will be set to 0. |
| |
| SkAutoSTMalloc<1024, UniChar> charStorage; |
| const UniChar* src; // UniChar is a UTF-16 16-bit code unit. |
| int srcCount; |
| switch (encoding) { |
| case kUTF8_Encoding: { |
| const char* utf8 = reinterpret_cast<const char*>(chars); |
| UniChar* utf16 = charStorage.reset(2 * glyphCount); |
| src = utf16; |
| for (int i = 0; i < glyphCount; ++i) { |
| SkUnichar uni = SkUTF8_NextUnichar(&utf8); |
| utf16 += SkUTF::ToUTF16(uni, utf16); |
| } |
| srcCount = SkToInt(utf16 - src); |
| break; |
| } |
| case kUTF16_Encoding: { |
| src = reinterpret_cast<const UniChar*>(chars); |
| int extra = 0; |
| for (int i = 0; i < glyphCount; ++i) { |
| if (SkUTF16_IsLeadingSurrogate(src[i + extra])) { |
| ++extra; |
| } |
| } |
| srcCount = glyphCount + extra; |
| break; |
| } |
| case kUTF32_Encoding: { |
| const SkUnichar* utf32 = reinterpret_cast<const SkUnichar*>(chars); |
| UniChar* utf16 = charStorage.reset(2 * glyphCount); |
| src = utf16; |
| for (int i = 0; i < glyphCount; ++i) { |
| utf16 += SkUTF::ToUTF16(utf32[i], utf16); |
| } |
| srcCount = SkToInt(utf16 - src); |
| break; |
| } |
| } |
| |
| // If glyphs is nullptr, CT still needs glyph storage for finding the first failure. |
| // Also, if there are any non-bmp code points, the provided 'glyphs' storage will be inadequate. |
| SkAutoSTMalloc<1024, uint16_t> glyphStorage; |
| uint16_t* macGlyphs = glyphs; |
| if (nullptr == macGlyphs || srcCount > glyphCount) { |
| macGlyphs = glyphStorage.reset(srcCount); |
| } |
| |
| bool allEncoded = CTFontGetGlyphsForCharacters(fFontRef.get(), src, macGlyphs, srcCount); |
| |
| // If there were any non-bmp, then copy and compact. |
| // If 'glyphs' is nullptr, then compact glyphStorage in-place. |
| // If all are bmp and 'glyphs' is non-nullptr, 'glyphs' already contains the compact glyphs. |
| // If some are non-bmp and 'glyphs' is non-nullptr, copy and compact into 'glyphs'. |
| uint16_t* compactedGlyphs = glyphs; |
| if (nullptr == compactedGlyphs) { |
| compactedGlyphs = macGlyphs; |
| } |
| if (srcCount > glyphCount) { |
| int extra = 0; |
| for (int i = 0; i < glyphCount; ++i) { |
| compactedGlyphs[i] = macGlyphs[i + extra]; |
| if (SkUTF16_IsLeadingSurrogate(src[i + extra])) { |
| ++extra; |
| } |
| } |
| } |
| |
| if (allEncoded) { |
| return glyphCount; |
| } |
| |
| // If we got false, then we need to manually look for first failure. |
| for (int i = 0; i < glyphCount; ++i) { |
| if (0 == compactedGlyphs[i]) { |
| return i; |
| } |
| } |
| // Odd to get here, as we expected CT to have returned true up front. |
| return glyphCount; |
| } |
| |
| int SkTypeface_Mac::onCountGlyphs() const { |
| return SkToInt(CTFontGetGlyphCount(fFontRef.get())); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool find_desc_str(CTFontDescriptorRef desc, CFStringRef name, SkString* value) { |
| SkUniqueCFRef<CFStringRef> ref((CFStringRef)CTFontDescriptorCopyAttribute(desc, name)); |
| if (!ref) { |
| return false; |
| } |
| CFStringToSkString(ref.get(), value); |
| return true; |
| } |
| |
| #include "SkFontMgr.h" |
| |
| static inline int sqr(int value) { |
| SkASSERT(SkAbs32(value) < 0x7FFF); // check for overflow |
| return value * value; |
| } |
| |
| // We normalize each axis (weight, width, italic) to be base-900 |
| static int compute_metric(const SkFontStyle& a, const SkFontStyle& b) { |
| return sqr(a.weight() - b.weight()) + |
| sqr((a.width() - b.width()) * 100) + |
| sqr((a.slant() != b.slant()) * 900); |
| } |
| |
| class SkFontStyleSet_Mac : public SkFontStyleSet { |
| public: |
| SkFontStyleSet_Mac(CTFontDescriptorRef desc) |
| : fArray(CTFontDescriptorCreateMatchingFontDescriptors(desc, nullptr)) |
| , fCount(0) |
| { |
| if (!fArray) { |
| fArray.reset(CFArrayCreate(nullptr, nullptr, 0, nullptr)); |
| } |
| fCount = SkToInt(CFArrayGetCount(fArray.get())); |
| } |
| |
| int count() override { |
| return fCount; |
| } |
| |
| void getStyle(int index, SkFontStyle* style, SkString* name) override { |
| SkASSERT((unsigned)index < (unsigned)fCount); |
| CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray.get(), index); |
| if (style) { |
| *style = fontstyle_from_descriptor(desc, false); |
| } |
| if (name) { |
| if (!find_desc_str(desc, kCTFontStyleNameAttribute, name)) { |
| name->reset(); |
| } |
| } |
| } |
| |
| SkTypeface* createTypeface(int index) override { |
| SkASSERT((unsigned)index < (unsigned)CFArrayGetCount(fArray.get())); |
| CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray.get(), index); |
| |
| return create_from_desc(desc).release(); |
| } |
| |
| SkTypeface* matchStyle(const SkFontStyle& pattern) override { |
| if (0 == fCount) { |
| return nullptr; |
| } |
| return create_from_desc(findMatchingDesc(pattern)).release(); |
| } |
| |
| private: |
| SkUniqueCFRef<CFArrayRef> fArray; |
| int fCount; |
| |
| CTFontDescriptorRef findMatchingDesc(const SkFontStyle& pattern) const { |
| int bestMetric = SK_MaxS32; |
| CTFontDescriptorRef bestDesc = nullptr; |
| |
| for (int i = 0; i < fCount; ++i) { |
| CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray.get(), i); |
| int metric = compute_metric(pattern, fontstyle_from_descriptor(desc, false)); |
| if (0 == metric) { |
| return desc; |
| } |
| if (metric < bestMetric) { |
| bestMetric = metric; |
| bestDesc = desc; |
| } |
| } |
| SkASSERT(bestDesc); |
| return bestDesc; |
| } |
| }; |
| |
| class SkFontMgr_Mac : public SkFontMgr { |
| SkUniqueCFRef<CFArrayRef> fNames; |
| int fCount; |
| |
| CFStringRef getFamilyNameAt(int index) const { |
| SkASSERT((unsigned)index < (unsigned)fCount); |
| return (CFStringRef)CFArrayGetValueAtIndex(fNames.get(), index); |
| } |
| |
| static SkFontStyleSet* CreateSet(CFStringRef cfFamilyName) { |
| SkUniqueCFRef<CFMutableDictionaryRef> cfAttr( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, 0, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| CFDictionaryAddValue(cfAttr.get(), kCTFontFamilyNameAttribute, cfFamilyName); |
| |
| SkUniqueCFRef<CTFontDescriptorRef> desc( |
| CTFontDescriptorCreateWithAttributes(cfAttr.get())); |
| return new SkFontStyleSet_Mac(desc.get()); |
| } |
| |
| /** CTFontManagerCopyAvailableFontFamilyNames() is not always available, so we |
| * provide a wrapper here that will return an empty array if need be. |
| */ |
| static SkUniqueCFRef<CFArrayRef> CopyAvailableFontFamilyNames() { |
| #ifdef SK_BUILD_FOR_IOS |
| return SkUniqueCFRef<CFArrayRef>(CFArrayCreate(nullptr, nullptr, 0, nullptr)); |
| #else |
| return SkUniqueCFRef<CFArrayRef>(CTFontManagerCopyAvailableFontFamilyNames()); |
| #endif |
| } |
| |
| public: |
| SkFontMgr_Mac() |
| : fNames(CopyAvailableFontFamilyNames()) |
| , fCount(fNames ? SkToInt(CFArrayGetCount(fNames.get())) : 0) {} |
| |
| protected: |
| int onCountFamilies() const override { |
| return fCount; |
| } |
| |
| void onGetFamilyName(int index, SkString* familyName) const override { |
| if ((unsigned)index < (unsigned)fCount) { |
| CFStringToSkString(this->getFamilyNameAt(index), familyName); |
| } else { |
| familyName->reset(); |
| } |
| } |
| |
| SkFontStyleSet* onCreateStyleSet(int index) const override { |
| if ((unsigned)index >= (unsigned)fCount) { |
| return nullptr; |
| } |
| return CreateSet(this->getFamilyNameAt(index)); |
| } |
| |
| SkFontStyleSet* onMatchFamily(const char familyName[]) const override { |
| if (!familyName) { |
| return nullptr; |
| } |
| SkUniqueCFRef<CFStringRef> cfName = make_CFString(familyName); |
| return CreateSet(cfName.get()); |
| } |
| |
| SkTypeface* onMatchFamilyStyle(const char familyName[], |
| const SkFontStyle& style) const override { |
| SkUniqueCFRef<CTFontDescriptorRef> desc = create_descriptor(familyName, style); |
| return create_from_desc(desc.get()).release(); |
| } |
| |
| SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], |
| const SkFontStyle& style, |
| const char* bcp47[], int bcp47Count, |
| SkUnichar character) const override { |
| SkUniqueCFRef<CTFontDescriptorRef> desc = create_descriptor(familyName, style); |
| SkUniqueCFRef<CTFontRef> familyFont(CTFontCreateWithFontDescriptor(desc.get(), 0, nullptr)); |
| |
| // kCFStringEncodingUTF32 is BE unless there is a BOM. |
| // Since there is no machine endian option, explicitly state machine endian. |
| #ifdef SK_CPU_LENDIAN |
| constexpr CFStringEncoding encoding = kCFStringEncodingUTF32LE; |
| #else |
| constexpr CFStringEncoding encoding = kCFStringEncodingUTF32BE; |
| #endif |
| SkUniqueCFRef<CFStringRef> string(CFStringCreateWithBytes( |
| kCFAllocatorDefault, reinterpret_cast<const UInt8 *>(&character), sizeof(character), |
| encoding, false)); |
| CFRange range = CFRangeMake(0, CFStringGetLength(string.get())); // in UniChar units. |
| SkUniqueCFRef<CTFontRef> fallbackFont( |
| CTFontCreateForString(familyFont.get(), string.get(), range)); |
| return create_from_CTFontRef(std::move(fallbackFont), nullptr, false).release(); |
| } |
| |
| SkTypeface* onMatchFaceStyle(const SkTypeface* familyMember, |
| const SkFontStyle&) const override { |
| return nullptr; |
| } |
| |
| sk_sp<SkTypeface> onMakeFromData(sk_sp<SkData> data, int ttcIndex) const override { |
| SkUniqueCFRef<CGDataProviderRef> pr(SkCreateDataProviderFromData(std::move(data))); |
| if (!pr) { |
| return nullptr; |
| } |
| return create_from_dataProvider(std::move(pr), ttcIndex); |
| } |
| |
| sk_sp<SkTypeface> onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset> stream, |
| int ttcIndex) const override { |
| SkUniqueCFRef<CGDataProviderRef> pr(SkCreateDataProviderFromStream(std::move(stream))); |
| if (!pr) { |
| return nullptr; |
| } |
| return create_from_dataProvider(std::move(pr), ttcIndex); |
| } |
| |
| /** Creates a dictionary suitable for setting the axes on a CGFont. */ |
| static SkUniqueCFRef<CFDictionaryRef> copy_axes(CGFontRef cg, const SkFontArguments& args) { |
| // The CGFont variation data is keyed by name, but lacks the tag. |
| // The CTFont variation data is keyed by tag, and also has the name. |
| // We would like to work with CTFont variations, but creating a CTFont font with |
| // CTFont variation dictionary runs into bugs. So use the CTFont variation data |
| // to match names to tags to create the appropriate CGFont. |
| SkUniqueCFRef<CTFontRef> ct(CTFontCreateWithGraphicsFont(cg, 0, nullptr, nullptr)); |
| // CTFontCopyVariationAxes returns nullptr for CGFontCreateWithDataProvider fonts with |
| // macOS 10.10 and iOS 9 or earlier. When this happens, there is no API to provide the tag. |
| SkUniqueCFRef<CFArrayRef> ctAxes(CTFontCopyVariationAxes(ct.get())); |
| if (!ctAxes) { |
| return nullptr; |
| } |
| CFIndex axisCount = CFArrayGetCount(ctAxes.get()); |
| |
| const SkFontArguments::VariationPosition position = args.getVariationDesignPosition(); |
| |
| SkUniqueCFRef<CFMutableDictionaryRef> dict( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, axisCount, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| for (int i = 0; i < axisCount; ++i) { |
| CFTypeRef axisInfo = CFArrayGetValueAtIndex(ctAxes.get(), i); |
| if (CFDictionaryGetTypeID() != CFGetTypeID(axisInfo)) { |
| return nullptr; |
| } |
| CFDictionaryRef axisInfoDict = static_cast<CFDictionaryRef>(axisInfo); |
| |
| // The assumption is that values produced by kCTFontVariationAxisNameKey and |
| // kCGFontVariationAxisName will always be equal. |
| // If they are ever not, seach the project history for "get_tag_for_name". |
| CFTypeRef axisName = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisNameKey); |
| if (!axisName || CFGetTypeID(axisName) != CFStringGetTypeID()) { |
| return nullptr; |
| } |
| |
| CFTypeRef tag = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisIdentifierKey); |
| if (!tag || CFGetTypeID(tag) != CFNumberGetTypeID()) { |
| return nullptr; |
| } |
| CFNumberRef tagNumber = static_cast<CFNumberRef>(tag); |
| int64_t tagLong; |
| if (!CFNumberGetValue(tagNumber, kCFNumberSInt64Type, &tagLong)) { |
| return nullptr; |
| } |
| |
| // The variation axes can be set to any value, but cg will effectively pin them. |
| // Pin them here to normalize. |
| CFTypeRef min = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisMinimumValueKey); |
| CFTypeRef max = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisMaximumValueKey); |
| CFTypeRef def = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisDefaultValueKey); |
| if (!min || CFGetTypeID(min) != CFNumberGetTypeID() || |
| !max || CFGetTypeID(max) != CFNumberGetTypeID() || |
| !def || CFGetTypeID(def) != CFNumberGetTypeID()) |
| { |
| return nullptr; |
| } |
| CFNumberRef minNumber = static_cast<CFNumberRef>(min); |
| CFNumberRef maxNumber = static_cast<CFNumberRef>(max); |
| CFNumberRef defNumber = static_cast<CFNumberRef>(def); |
| double minDouble; |
| double maxDouble; |
| double defDouble; |
| if (!CFNumberGetValue(minNumber, kCFNumberDoubleType, &minDouble) || |
| !CFNumberGetValue(maxNumber, kCFNumberDoubleType, &maxDouble) || |
| !CFNumberGetValue(defNumber, kCFNumberDoubleType, &defDouble)) |
| { |
| return nullptr; |
| } |
| |
| double value = defDouble; |
| // The position may be over specified. If there are multiple values for a given axis, |
| // use the last one since that's what css-fonts-4 requires. |
| for (int j = position.coordinateCount; j --> 0;) { |
| if (position.coordinates[j].axis == tagLong) { |
| value = SkTPin(SkScalarToDouble(position.coordinates[j].value), |
| minDouble, maxDouble); |
| break; |
| } |
| } |
| SkUniqueCFRef<CFNumberRef> valueNumber( |
| CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, &value)); |
| CFDictionaryAddValue(dict.get(), axisName, valueNumber.get()); |
| } |
| return std::move(dict); |
| } |
| sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset> s, |
| const SkFontArguments& args) const override { |
| if (args.getCollectionIndex() != 0) { |
| return nullptr; |
| } |
| SkUniqueCFRef<CGDataProviderRef> provider(SkCreateDataProviderFromStream(std::move(s))); |
| if (!provider) { |
| return nullptr; |
| } |
| SkUniqueCFRef<CGFontRef> cg(CGFontCreateWithDataProvider(provider.get())); |
| if (!cg) { |
| return nullptr; |
| } |
| |
| SkUniqueCFRef<CFDictionaryRef> cgVariations = copy_axes(cg.get(), args); |
| // The CGFontRef returned by CGFontCreateCopyWithVariations when the passed CGFontRef was |
| // created from a data provider does not appear to have any ownership of the underlying |
| // data. The original CGFontRef must be kept alive until the copy will no longer be used. |
| SkUniqueCFRef<CGFontRef> cgVariant; |
| if (cgVariations) { |
| cgVariant.reset(CGFontCreateCopyWithVariations(cg.get(), cgVariations.get())); |
| } else { |
| cgVariant.reset(cg.release()); |
| } |
| |
| SkUniqueCFRef<CTFontRef> ct( |
| CTFontCreateWithGraphicsFont(cgVariant.get(), 0, nullptr, nullptr)); |
| if (!ct) { |
| return nullptr; |
| } |
| return create_from_CTFontRef(std::move(ct), std::move(cg), true); |
| } |
| |
| /** Creates a dictionary suitable for setting the axes on a CGFont. */ |
| static SkUniqueCFRef<CFDictionaryRef> copy_axes(CGFontRef cg, SkFontData* fontData) { |
| SkUniqueCFRef<CFArrayRef> cgAxes(CGFontCopyVariationAxes(cg)); |
| if (!cgAxes) { |
| return nullptr; |
| } |
| |
| CFIndex axisCount = CFArrayGetCount(cgAxes.get()); |
| if (0 == axisCount || axisCount != fontData->getAxisCount()) { |
| return nullptr; |
| } |
| |
| SkUniqueCFRef<CFMutableDictionaryRef> dict( |
| CFDictionaryCreateMutable(kCFAllocatorDefault, axisCount, |
| &kCFTypeDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks)); |
| |
| for (int i = 0; i < fontData->getAxisCount(); ++i) { |
| CFTypeRef axisInfo = CFArrayGetValueAtIndex(cgAxes.get(), i); |
| if (CFDictionaryGetTypeID() != CFGetTypeID(axisInfo)) { |
| return nullptr; |
| } |
| CFDictionaryRef axisInfoDict = static_cast<CFDictionaryRef>(axisInfo); |
| |
| CFTypeRef axisName = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisName); |
| if (!axisName || CFGetTypeID(axisName) != CFStringGetTypeID()) { |
| return nullptr; |
| } |
| |
| // The variation axes can be set to any value, but cg will effectively pin them. |
| // Pin them here to normalize. |
| CFTypeRef min = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisMinValue); |
| CFTypeRef max = CFDictionaryGetValue(axisInfoDict, kCGFontVariationAxisMaxValue); |
| if (!min || CFGetTypeID(min) != CFNumberGetTypeID() || |
| !max || CFGetTypeID(max) != CFNumberGetTypeID()) |
| { |
| return nullptr; |
| } |
| CFNumberRef minNumber = static_cast<CFNumberRef>(min); |
| CFNumberRef maxNumber = static_cast<CFNumberRef>(max); |
| double minDouble; |
| double maxDouble; |
| if (!CFNumberGetValue(minNumber, kCFNumberDoubleType, &minDouble) || |
| !CFNumberGetValue(maxNumber, kCFNumberDoubleType, &maxDouble)) |
| { |
| return nullptr; |
| } |
| double value = SkTPin(SkFixedToDouble(fontData->getAxis()[i]), minDouble, maxDouble); |
| SkUniqueCFRef<CFNumberRef> valueNumber( |
| CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, &value)); |
| CFDictionaryAddValue(dict.get(), axisName, valueNumber.get()); |
| } |
| return std::move(dict); |
| } |
| sk_sp<SkTypeface> onMakeFromFontData(std::unique_ptr<SkFontData> fontData) const override { |
| if (fontData->getIndex() != 0) { |
| return nullptr; |
| } |
| SkUniqueCFRef<CGDataProviderRef> provider( |
| SkCreateDataProviderFromStream(fontData->detachStream())); |
| if (!provider) { |
| return nullptr; |
| } |
| SkUniqueCFRef<CGFontRef> cg(CGFontCreateWithDataProvider(provider.get())); |
| if (!cg) { |
| return nullptr; |
| } |
| |
| SkUniqueCFRef<CFDictionaryRef> cgVariations = copy_axes(cg.get(), fontData.get()); |
| // The CGFontRef returned by CGFontCreateCopyWithVariations when the passed CGFontRef was |
| // created from a data provider does not appear to have any ownership of the underlying |
| // data. The original CGFontRef must be kept alive until the copy will no longer be used. |
| SkUniqueCFRef<CGFontRef> cgVariant; |
| if (cgVariations) { |
| cgVariant.reset(CGFontCreateCopyWithVariations(cg.get(), cgVariations.get())); |
| } else { |
| cgVariant.reset(cg.release()); |
| } |
| |
| SkUniqueCFRef<CTFontRef> ct( |
| CTFontCreateWithGraphicsFont(cgVariant.get(), 0, nullptr, nullptr)); |
| if (!ct) { |
| return nullptr; |
| } |
| return create_from_CTFontRef(std::move(ct), std::move(cg), true); |
| } |
| |
| sk_sp<SkTypeface> onMakeFromFile(const char path[], int ttcIndex) const override { |
| SkUniqueCFRef<CGDataProviderRef> pr(CGDataProviderCreateWithFilename(path)); |
| if (!pr) { |
| return nullptr; |
| } |
| return create_from_dataProvider(std::move(pr), ttcIndex); |
| } |
| |
| sk_sp<SkTypeface> onLegacyMakeTypeface(const char familyName[], SkFontStyle style) const override { |
| if (familyName) { |
| familyName = map_css_names(familyName); |
| } |
| |
| sk_sp<SkTypeface> face = create_from_name(familyName, style); |
| if (face) { |
| return face; |
| } |
| |
| static SkTypeface* gDefaultFace; |
| static SkOnce lookupDefault; |
| static const char FONT_DEFAULT_NAME[] = "Lucida Sans"; |
| lookupDefault([]{ |
| gDefaultFace = create_from_name(FONT_DEFAULT_NAME, SkFontStyle()).release(); |
| }); |
| return sk_ref_sp(gDefaultFace); |
| } |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| sk_sp<SkFontMgr> SkFontMgr::Factory() { return sk_make_sp<SkFontMgr_Mac>(); } |
| |
| #endif//defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) |