epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
reed@android.com | 0d55f1e | 2008-12-18 19:26:11 +0000 | [diff] [blame] | 8 | #include "SkCGUtils.h" |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 9 | #include "SkBitmap.h" |
reed@android.com | a545a55 | 2009-06-29 17:07:19 +0000 | [diff] [blame] | 10 | #include "SkColorPriv.h" |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 11 | |
reed@android.com | 2b26cac | 2008-12-22 02:33:11 +0000 | [diff] [blame] | 12 | static void SkBitmap_ReleaseInfo(void* info, const void* pixelData, size_t size) { |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 13 | SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(info); |
| 14 | delete bitmap; |
| 15 | } |
| 16 | |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 17 | static bool getBitmapInfo(const SkBitmap& bm, |
reed@google.com | 9c16bc0 | 2011-06-28 21:52:34 +0000 | [diff] [blame] | 18 | size_t* bitsPerComponent, |
| 19 | CGBitmapInfo* info, |
| 20 | bool* upscaleTo32) { |
| 21 | if (upscaleTo32) { |
| 22 | *upscaleTo32 = false; |
| 23 | } |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 24 | |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 25 | switch (bm.config()) { |
reed@android.com | 32a4249 | 2009-07-10 03:33:52 +0000 | [diff] [blame] | 26 | case SkBitmap::kRGB_565_Config: |
reed@google.com | 9c16bc0 | 2011-06-28 21:52:34 +0000 | [diff] [blame] | 27 | if (upscaleTo32) { |
| 28 | *upscaleTo32 = true; |
| 29 | } |
reed@android.com | 32a4249 | 2009-07-10 03:33:52 +0000 | [diff] [blame] | 30 | // fall through |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 31 | case SkBitmap::kARGB_8888_Config: |
| 32 | *bitsPerComponent = 8; |
commit-bot@chromium.org | 5dc14c1 | 2013-07-15 13:00:45 +0000 | [diff] [blame] | 33 | #if SK_PMCOLOR_BYTE_ORDER(R,G,B,A) |
scroggo@google.com | 426648e | 2012-11-12 16:18:43 +0000 | [diff] [blame] | 34 | *info = kCGBitmapByteOrder32Big; |
| 35 | if (bm.isOpaque()) { |
| 36 | *info |= kCGImageAlphaNoneSkipLast; |
| 37 | } else { |
| 38 | *info |= kCGImageAlphaPremultipliedLast; |
| 39 | } |
commit-bot@chromium.org | 5dc14c1 | 2013-07-15 13:00:45 +0000 | [diff] [blame] | 40 | #elif SK_PMCOLOR_BYTE_ORDER(B,G,R,A) |
reed@android.com | 8ede492 | 2009-06-22 20:04:33 +0000 | [diff] [blame] | 41 | // Matches the CGBitmapInfo that Apple recommends for best |
| 42 | // performance, used by google chrome. |
scroggo@google.com | 426648e | 2012-11-12 16:18:43 +0000 | [diff] [blame] | 43 | *info = kCGBitmapByteOrder32Little; |
| 44 | if (bm.isOpaque()) { |
| 45 | *info |= kCGImageAlphaNoneSkipFirst; |
| 46 | } else { |
| 47 | *info |= kCGImageAlphaPremultipliedFirst; |
| 48 | } |
reed@android.com | 8ede492 | 2009-06-22 20:04:33 +0000 | [diff] [blame] | 49 | #else |
reed@google.com | 9c16bc0 | 2011-06-28 21:52:34 +0000 | [diff] [blame] | 50 | // ...add more formats as required... |
reed@android.com | 8ede492 | 2009-06-22 20:04:33 +0000 | [diff] [blame] | 51 | #warning Cannot convert SkBitmap to CGImageRef with these shiftmasks. \ |
reed@google.com | 9c16bc0 | 2011-06-28 21:52:34 +0000 | [diff] [blame] | 52 | This will probably not work. |
reed@android.com | 8ede492 | 2009-06-22 20:04:33 +0000 | [diff] [blame] | 53 | // Legacy behavior. Perhaps turn this into an error at some |
| 54 | // point. |
scroggo@google.com | 426648e | 2012-11-12 16:18:43 +0000 | [diff] [blame] | 55 | *info = kCGBitmapByteOrder32Big; |
| 56 | if (bm.isOpaque()) { |
| 57 | *info |= kCGImageAlphaNoneSkipLast; |
| 58 | } else { |
| 59 | *info |= kCGImageAlphaPremultipliedLast; |
| 60 | } |
reed@android.com | 8ede492 | 2009-06-22 20:04:33 +0000 | [diff] [blame] | 61 | #endif |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 62 | break; |
reed@android.com | 32a4249 | 2009-07-10 03:33:52 +0000 | [diff] [blame] | 63 | #if 0 |
reed@android.com | 0680d6c | 2008-12-19 19:46:15 +0000 | [diff] [blame] | 64 | case SkBitmap::kRGB_565_Config: |
| 65 | // doesn't see quite right. Are they thinking 1555? |
| 66 | *bitsPerComponent = 5; |
scroggo@google.com | 426648e | 2012-11-12 16:18:43 +0000 | [diff] [blame] | 67 | *info = kCGBitmapByteOrder16Little | kCGImageAlphaNone; |
reed@android.com | 0680d6c | 2008-12-19 19:46:15 +0000 | [diff] [blame] | 68 | break; |
reed@android.com | 32a4249 | 2009-07-10 03:33:52 +0000 | [diff] [blame] | 69 | #endif |
reed@android.com | 0680d6c | 2008-12-19 19:46:15 +0000 | [diff] [blame] | 70 | case SkBitmap::kARGB_4444_Config: |
| 71 | *bitsPerComponent = 4; |
scroggo@google.com | 426648e | 2012-11-12 16:18:43 +0000 | [diff] [blame] | 72 | *info = kCGBitmapByteOrder16Little; |
| 73 | if (bm.isOpaque()) { |
| 74 | *info |= kCGImageAlphaNoneSkipLast; |
| 75 | } else { |
| 76 | *info |= kCGImageAlphaPremultipliedLast; |
| 77 | } |
reed@android.com | 0680d6c | 2008-12-19 19:46:15 +0000 | [diff] [blame] | 78 | break; |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 79 | default: |
reed@google.com | 9c16bc0 | 2011-06-28 21:52:34 +0000 | [diff] [blame] | 80 | return false; |
| 81 | } |
| 82 | return true; |
| 83 | } |
| 84 | |
| 85 | static SkBitmap* prepareForImageRef(const SkBitmap& bm, |
| 86 | size_t* bitsPerComponent, |
| 87 | CGBitmapInfo* info) { |
| 88 | bool upscaleTo32; |
| 89 | if (!getBitmapInfo(bm, bitsPerComponent, info, &upscaleTo32)) { |
| 90 | return NULL; |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 91 | } |
| 92 | |
reed@android.com | 32a4249 | 2009-07-10 03:33:52 +0000 | [diff] [blame] | 93 | SkBitmap* copy; |
| 94 | if (upscaleTo32) { |
| 95 | copy = new SkBitmap; |
| 96 | // here we make a ceep copy of the pixels, since CG won't take our |
| 97 | // 565 directly |
| 98 | bm.copyTo(copy, SkBitmap::kARGB_8888_Config); |
| 99 | } else { |
| 100 | copy = new SkBitmap(bm); |
| 101 | } |
| 102 | return copy; |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 103 | } |
| 104 | |
reed@android.com | 38669c1 | 2011-01-03 13:48:50 +0000 | [diff] [blame] | 105 | CGImageRef SkCreateCGImageRefWithColorspace(const SkBitmap& bm, |
| 106 | CGColorSpaceRef colorSpace) { |
| 107 | size_t bitsPerComponent SK_INIT_TO_AVOID_WARNING; |
| 108 | CGBitmapInfo info SK_INIT_TO_AVOID_WARNING; |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 109 | |
| 110 | SkBitmap* bitmap = prepareForImageRef(bm, &bitsPerComponent, &info); |
| 111 | if (NULL == bitmap) { |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | const int w = bitmap->width(); |
| 116 | const int h = bitmap->height(); |
| 117 | const size_t s = bitmap->getSize(); |
| 118 | |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 119 | // our provider "owns" the bitmap*, and will take care of deleting it |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 120 | // we initially lock it, so we can access the pixels. The bitmap will be deleted in the release |
| 121 | // proc, which will in turn unlock the pixels |
| 122 | bitmap->lockPixels(); |
reed@android.com | 2b26cac | 2008-12-22 02:33:11 +0000 | [diff] [blame] | 123 | CGDataProviderRef dataRef = CGDataProviderCreateWithData(bitmap, bitmap->getPixels(), s, |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 124 | SkBitmap_ReleaseInfo); |
reed@android.com | 2b26cac | 2008-12-22 02:33:11 +0000 | [diff] [blame] | 125 | |
reed@android.com | 38669c1 | 2011-01-03 13:48:50 +0000 | [diff] [blame] | 126 | bool releaseColorSpace = false; |
| 127 | if (NULL == colorSpace) { |
reed@google.com | c280d11 | 2011-01-05 16:07:35 +0000 | [diff] [blame] | 128 | colorSpace = CGColorSpaceCreateDeviceRGB(); |
reed@android.com | 38669c1 | 2011-01-03 13:48:50 +0000 | [diff] [blame] | 129 | releaseColorSpace = true; |
| 130 | } |
| 131 | |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 132 | CGImageRef ref = CGImageCreate(w, h, bitsPerComponent, |
| 133 | bitmap->bytesPerPixel() * 8, |
reed@android.com | 38669c1 | 2011-01-03 13:48:50 +0000 | [diff] [blame] | 134 | bitmap->rowBytes(), colorSpace, info, dataRef, |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 135 | NULL, false, kCGRenderingIntentDefault); |
reed@android.com | 38669c1 | 2011-01-03 13:48:50 +0000 | [diff] [blame] | 136 | |
| 137 | if (releaseColorSpace) { |
| 138 | CGColorSpaceRelease(colorSpace); |
| 139 | } |
reed@android.com | 758b129 | 2008-12-18 17:54:12 +0000 | [diff] [blame] | 140 | CGDataProviderRelease(dataRef); |
| 141 | return ref; |
| 142 | } |
| 143 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 144 | void SkCGDrawBitmap(CGContextRef cg, const SkBitmap& bm, float x, float y) { |
| 145 | CGImageRef img = SkCreateCGImageRef(bm); |
| 146 | |
| 147 | if (img) { |
| 148 | CGRect r = CGRectMake(0, 0, bm.width(), bm.height()); |
reed@google.com | 62f4659 | 2011-01-05 15:49:43 +0000 | [diff] [blame] | 149 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 150 | CGContextSaveGState(cg); |
| 151 | CGContextTranslateCTM(cg, x, r.size.height + y); |
| 152 | CGContextScaleCTM(cg, 1, -1); |
reed@google.com | 62f4659 | 2011-01-05 15:49:43 +0000 | [diff] [blame] | 153 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 154 | CGContextDrawImage(cg, r, img); |
reed@google.com | 62f4659 | 2011-01-05 15:49:43 +0000 | [diff] [blame] | 155 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 156 | CGContextRestoreGState(cg); |
reed@google.com | 62f4659 | 2011-01-05 15:49:43 +0000 | [diff] [blame] | 157 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 158 | CGImageRelease(img); |
| 159 | } |
| 160 | } |
| 161 | |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 162 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 163 | |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 164 | #include "SkStream.h" |
| 165 | |
| 166 | class SkAutoPDFRelease { |
| 167 | public: |
| 168 | SkAutoPDFRelease(CGPDFDocumentRef doc) : fDoc(doc) {} |
| 169 | ~SkAutoPDFRelease() { |
| 170 | if (fDoc) { |
| 171 | CGPDFDocumentRelease(fDoc); |
| 172 | } |
| 173 | } |
| 174 | private: |
| 175 | CGPDFDocumentRef fDoc; |
| 176 | }; |
commit-bot@chromium.org | e61a86c | 2013-11-18 16:03:59 +0000 | [diff] [blame] | 177 | #define SkAutoPDFRelease(...) SK_REQUIRE_LOCAL_VAR(SkAutoPDFRelease) |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 178 | |
| 179 | static void CGDataProviderReleaseData_FromMalloc(void*, const void* data, |
| 180 | size_t size) { |
| 181 | sk_free((void*)data); |
| 182 | } |
| 183 | |
| 184 | bool SkPDFDocumentToBitmap(SkStream* stream, SkBitmap* output) { |
| 185 | size_t size = stream->getLength(); |
| 186 | void* ptr = sk_malloc_throw(size); |
| 187 | stream->read(ptr, size); |
| 188 | CGDataProviderRef data = CGDataProviderCreateWithData(NULL, ptr, size, |
| 189 | CGDataProviderReleaseData_FromMalloc); |
| 190 | if (NULL == data) { |
| 191 | return false; |
| 192 | } |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 193 | |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 194 | CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(data); |
| 195 | CGDataProviderRelease(data); |
| 196 | if (NULL == pdf) { |
| 197 | return false; |
| 198 | } |
| 199 | SkAutoPDFRelease releaseMe(pdf); |
| 200 | |
| 201 | CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1); |
| 202 | if (NULL == page) { |
| 203 | return false; |
| 204 | } |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 205 | |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 206 | CGRect bounds = CGPDFPageGetBoxRect(page, kCGPDFMediaBox); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 207 | |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 208 | int w = (int)CGRectGetWidth(bounds); |
| 209 | int h = (int)CGRectGetHeight(bounds); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 210 | |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 211 | SkBitmap bitmap; |
| 212 | bitmap.setConfig(SkBitmap::kARGB_8888_Config, w, h); |
| 213 | bitmap.allocPixels(); |
| 214 | bitmap.eraseColor(SK_ColorWHITE); |
reed@google.com | 9c16bc0 | 2011-06-28 21:52:34 +0000 | [diff] [blame] | 215 | |
| 216 | size_t bitsPerComponent; |
| 217 | CGBitmapInfo info; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 218 | getBitmapInfo(bitmap, &bitsPerComponent, &info, NULL); |
reed@google.com | cd88d7c | 2011-06-29 20:12:38 +0000 | [diff] [blame] | 219 | |
| 220 | CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB(); |
| 221 | CGContextRef ctx = CGBitmapContextCreate(bitmap.getPixels(), w, h, |
| 222 | bitsPerComponent, bitmap.rowBytes(), |
| 223 | cs, info); |
| 224 | CGColorSpaceRelease(cs); |
| 225 | |
reed@google.com | 292ade6 | 2011-06-28 20:54:03 +0000 | [diff] [blame] | 226 | if (ctx) { |
| 227 | CGContextDrawPDFPage(ctx, page); |
| 228 | CGContextRelease(ctx); |
| 229 | } |
| 230 | |
| 231 | output->swap(bitmap); |
| 232 | return true; |
| 233 | } |