scroggo@google.com | 3cb969f | 2012-07-27 20:39:19 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "gm.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkString.h" |
| 11 | #include "SkTypeface.h" |
| 12 | #include "SkTypes.h" |
| 13 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 14 | static void getGlyphPositions(const SkPaint& paint, const uint16_t glyphs[], |
| 15 | int count, SkScalar x, SkScalar y, SkPoint pos[]) { |
| 16 | SkASSERT(SkPaint::kGlyphID_TextEncoding == paint.getTextEncoding()); |
| 17 | |
| 18 | SkAutoSTMalloc<128, SkScalar> widthStorage(count); |
| 19 | SkScalar* widths = widthStorage.get(); |
| 20 | paint.getTextWidths(glyphs, count * sizeof(uint16_t), widths); |
skia.committer@gmail.com | 7ed98df | 2013-10-31 07:01:53 +0000 | [diff] [blame] | 21 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 22 | for (int i = 0; i < count; ++i) { |
| 23 | pos[i].set(x, y); |
| 24 | x += widths[i]; |
| 25 | } |
| 26 | } |
| 27 | |
| 28 | static void applyKerning(SkPoint pos[], const int32_t adjustments[], int count, |
| 29 | const SkPaint& paint) { |
| 30 | SkScalar scale = paint.getTextSize() / paint.getTypeface()->getUnitsPerEm(); |
| 31 | |
| 32 | SkScalar globalAdj = 0; |
| 33 | for (int i = 0; i < count - 1; ++i) { |
| 34 | globalAdj += adjustments[i] * scale; |
| 35 | pos[i + 1].fX += globalAdj; |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | static void drawKernText(SkCanvas* canvas, const void* text, size_t len, |
| 40 | SkScalar x, SkScalar y, const SkPaint& paint) { |
| 41 | SkTypeface* face = paint.getTypeface(); |
| 42 | if (!face) { |
| 43 | canvas->drawText(text, len, x, y, paint); |
| 44 | return; |
| 45 | } |
| 46 | |
| 47 | SkAutoSTMalloc<128, uint16_t> glyphStorage(len); |
| 48 | uint16_t* glyphs = glyphStorage.get(); |
| 49 | int glyphCount = paint.textToGlyphs(text, len, glyphs); |
| 50 | if (glyphCount < 1) { |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | SkAutoSTMalloc<128, int32_t> adjustmentStorage(glyphCount - 1); |
| 55 | int32_t* adjustments = adjustmentStorage.get(); |
| 56 | if (!face->getKerningPairAdjustments(glyphs, glyphCount, adjustments)) { |
| 57 | canvas->drawText(text, len, x, y, paint); |
| 58 | return; |
| 59 | } |
| 60 | |
| 61 | SkPaint glyphPaint(paint); |
| 62 | glyphPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| 63 | |
| 64 | SkAutoSTMalloc<128, SkPoint> posStorage(glyphCount); |
| 65 | SkPoint* pos = posStorage.get(); |
| 66 | getGlyphPositions(glyphPaint, glyphs, glyphCount, x, y, pos); |
| 67 | |
| 68 | applyKerning(pos, adjustments, glyphCount, glyphPaint); |
| 69 | canvas->drawPosText(glyphs, glyphCount * sizeof(uint16_t), pos, glyphPaint); |
| 70 | } |
| 71 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 72 | static const struct { |
| 73 | const char* fName; |
| 74 | SkTypeface::Style fStyle; |
| 75 | } gFaceStyles[] = { |
| 76 | { "sans-serif", SkTypeface::kNormal }, |
| 77 | { "sans-serif", SkTypeface::kBold }, |
| 78 | { "sans-serif", SkTypeface::kItalic }, |
| 79 | { "sans-serif", SkTypeface::kBoldItalic }, |
| 80 | { "serif", SkTypeface::kNormal }, |
| 81 | { "serif", SkTypeface::kBold }, |
| 82 | { "serif", SkTypeface::kItalic }, |
| 83 | { "serif", SkTypeface::kBoldItalic }, |
| 84 | { "monospace", SkTypeface::kNormal }, |
| 85 | { "monospace", SkTypeface::kBold }, |
| 86 | { "monospace", SkTypeface::kItalic }, |
| 87 | { "monospace", SkTypeface::kBoldItalic }, |
| 88 | }; |
scroggo@google.com | 3cb969f | 2012-07-27 20:39:19 +0000 | [diff] [blame] | 89 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 90 | static const int gFaceStylesCount = SK_ARRAY_COUNT(gFaceStyles); |
| 91 | |
| 92 | class TypefaceStylesGM : public skiagm::GM { |
| 93 | SkTypeface* fFaces[gFaceStylesCount]; |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 94 | bool fApplyKerning; |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 95 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 96 | public: |
kkinnunen | b4a797f | 2015-05-21 06:15:28 -0700 | [diff] [blame] | 97 | TypefaceStylesGM(bool applyKerning) |
| 98 | : fApplyKerning(applyKerning) { |
| 99 | memset(fFaces, 0, sizeof(fFaces)); |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 100 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 101 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 102 | virtual ~TypefaceStylesGM() { |
| 103 | for (int i = 0; i < gFaceStylesCount; i++) { |
| 104 | SkSafeUnref(fFaces[i]); |
| 105 | } |
| 106 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 107 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 108 | protected: |
kkinnunen | b4a797f | 2015-05-21 06:15:28 -0700 | [diff] [blame] | 109 | void onOnceBeforeDraw() override { |
| 110 | for (int i = 0; i < gFaceStylesCount; i++) { |
caryclark | 3721355 | 2015-07-24 11:08:01 -0700 | [diff] [blame] | 111 | fFaces[i] = SkTypeface::CreateFromName( |
| 112 | sk_tool_utils::platform_font_name(gFaceStyles[i].fName), gFaceStyles[i].fStyle); |
kkinnunen | b4a797f | 2015-05-21 06:15:28 -0700 | [diff] [blame] | 113 | } |
| 114 | } |
| 115 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 116 | SkString onShortName() override { |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 117 | SkString name("typefacestyles"); |
| 118 | if (fApplyKerning) { |
| 119 | name.append("_kerning"); |
| 120 | } |
caryclark | 3721355 | 2015-07-24 11:08:01 -0700 | [diff] [blame] | 121 | name.append(sk_tool_utils::major_platform_os_name()); |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 122 | return name; |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 123 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 124 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 125 | SkISize onISize() override { |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 126 | return SkISize::Make(640, 480); |
| 127 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 128 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 129 | void onDraw(SkCanvas* canvas) override { |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 130 | SkPaint paint; |
| 131 | paint.setAntiAlias(true); |
| 132 | paint.setTextSize(SkIntToScalar(30)); |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 133 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 134 | const char* text = fApplyKerning ? "Type AWAY" : "Hamburgefons"; |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 135 | const size_t textLen = strlen(text); |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 136 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 137 | SkScalar x = SkIntToScalar(10); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 138 | SkScalar dy = paint.getFontMetrics(nullptr); |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 139 | SkScalar y = dy; |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 140 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 141 | if (fApplyKerning) { |
| 142 | paint.setSubpixelText(true); |
| 143 | } else { |
| 144 | paint.setLinearText(true); |
| 145 | } |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 146 | for (int i = 0; i < gFaceStylesCount; i++) { |
| 147 | paint.setTypeface(fFaces[i]); |
| 148 | canvas->drawText(text, textLen, x, y, paint); |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 149 | if (fApplyKerning) { |
| 150 | drawKernText(canvas, text, textLen, x + 240, y, paint); |
| 151 | } |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 152 | y += dy; |
| 153 | } |
| 154 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 155 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 156 | private: |
| 157 | typedef skiagm::GM INHERITED; |
| 158 | }; |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 159 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 160 | /////////////////////////////////////////////////////////////////////////////// |
| 161 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 162 | DEF_GM( return new TypefaceStylesGM(false); ) |
| 163 | DEF_GM( return new TypefaceStylesGM(true); ) |