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" |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 9 | #include "Resources.h" |
scroggo@google.com | 3cb969f | 2012-07-27 20:39:19 +0000 | [diff] [blame] | 10 | #include "SkCanvas.h" |
| 11 | #include "SkString.h" |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 12 | #include "SkSurfaceProps.h" |
scroggo@google.com | 3cb969f | 2012-07-27 20:39:19 +0000 | [diff] [blame] | 13 | #include "SkTypeface.h" |
| 14 | #include "SkTypes.h" |
| 15 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 16 | static void getGlyphPositions(const SkPaint& paint, const uint16_t glyphs[], |
| 17 | int count, SkScalar x, SkScalar y, SkPoint pos[]) { |
| 18 | SkASSERT(SkPaint::kGlyphID_TextEncoding == paint.getTextEncoding()); |
| 19 | |
| 20 | SkAutoSTMalloc<128, SkScalar> widthStorage(count); |
| 21 | SkScalar* widths = widthStorage.get(); |
| 22 | paint.getTextWidths(glyphs, count * sizeof(uint16_t), widths); |
skia.committer@gmail.com | 7ed98df | 2013-10-31 07:01:53 +0000 | [diff] [blame] | 23 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 24 | for (int i = 0; i < count; ++i) { |
| 25 | pos[i].set(x, y); |
| 26 | x += widths[i]; |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | static void applyKerning(SkPoint pos[], const int32_t adjustments[], int count, |
| 31 | const SkPaint& paint) { |
| 32 | SkScalar scale = paint.getTextSize() / paint.getTypeface()->getUnitsPerEm(); |
| 33 | |
| 34 | SkScalar globalAdj = 0; |
| 35 | for (int i = 0; i < count - 1; ++i) { |
| 36 | globalAdj += adjustments[i] * scale; |
| 37 | pos[i + 1].fX += globalAdj; |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | static void drawKernText(SkCanvas* canvas, const void* text, size_t len, |
| 42 | SkScalar x, SkScalar y, const SkPaint& paint) { |
| 43 | SkTypeface* face = paint.getTypeface(); |
| 44 | if (!face) { |
| 45 | canvas->drawText(text, len, x, y, paint); |
| 46 | return; |
| 47 | } |
| 48 | |
| 49 | SkAutoSTMalloc<128, uint16_t> glyphStorage(len); |
| 50 | uint16_t* glyphs = glyphStorage.get(); |
| 51 | int glyphCount = paint.textToGlyphs(text, len, glyphs); |
| 52 | if (glyphCount < 1) { |
| 53 | return; |
| 54 | } |
| 55 | |
| 56 | SkAutoSTMalloc<128, int32_t> adjustmentStorage(glyphCount - 1); |
| 57 | int32_t* adjustments = adjustmentStorage.get(); |
| 58 | if (!face->getKerningPairAdjustments(glyphs, glyphCount, adjustments)) { |
| 59 | canvas->drawText(text, len, x, y, paint); |
| 60 | return; |
| 61 | } |
| 62 | |
| 63 | SkPaint glyphPaint(paint); |
| 64 | glyphPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| 65 | |
| 66 | SkAutoSTMalloc<128, SkPoint> posStorage(glyphCount); |
| 67 | SkPoint* pos = posStorage.get(); |
| 68 | getGlyphPositions(glyphPaint, glyphs, glyphCount, x, y, pos); |
| 69 | |
| 70 | applyKerning(pos, adjustments, glyphCount, glyphPaint); |
| 71 | canvas->drawPosText(glyphs, glyphCount * sizeof(uint16_t), pos, glyphPaint); |
| 72 | } |
| 73 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 74 | static const struct { |
| 75 | const char* fName; |
| 76 | SkTypeface::Style fStyle; |
| 77 | } gFaceStyles[] = { |
| 78 | { "sans-serif", SkTypeface::kNormal }, |
| 79 | { "sans-serif", SkTypeface::kBold }, |
| 80 | { "sans-serif", SkTypeface::kItalic }, |
| 81 | { "sans-serif", SkTypeface::kBoldItalic }, |
| 82 | { "serif", SkTypeface::kNormal }, |
| 83 | { "serif", SkTypeface::kBold }, |
| 84 | { "serif", SkTypeface::kItalic }, |
| 85 | { "serif", SkTypeface::kBoldItalic }, |
| 86 | { "monospace", SkTypeface::kNormal }, |
| 87 | { "monospace", SkTypeface::kBold }, |
| 88 | { "monospace", SkTypeface::kItalic }, |
| 89 | { "monospace", SkTypeface::kBoldItalic }, |
| 90 | }; |
scroggo@google.com | 3cb969f | 2012-07-27 20:39:19 +0000 | [diff] [blame] | 91 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 92 | static const int gFaceStylesCount = SK_ARRAY_COUNT(gFaceStyles); |
| 93 | |
| 94 | class TypefaceStylesGM : public skiagm::GM { |
bungeman | 13b9c95 | 2016-05-12 10:09:30 -0700 | [diff] [blame] | 95 | sk_sp<SkTypeface> fFaces[gFaceStylesCount]; |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 96 | bool fApplyKerning; |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 97 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 98 | public: |
kkinnunen | b4a797f | 2015-05-21 06:15:28 -0700 | [diff] [blame] | 99 | TypefaceStylesGM(bool applyKerning) |
| 100 | : fApplyKerning(applyKerning) { |
| 101 | memset(fFaces, 0, sizeof(fFaces)); |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 102 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 103 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 104 | protected: |
kkinnunen | b4a797f | 2015-05-21 06:15:28 -0700 | [diff] [blame] | 105 | void onOnceBeforeDraw() override { |
| 106 | for (int i = 0; i < gFaceStylesCount; i++) { |
bungeman | 13b9c95 | 2016-05-12 10:09:30 -0700 | [diff] [blame] | 107 | fFaces[i] = SkTypeface::MakeFromName( |
mboc | ee6a991 | 2016-05-31 11:42:36 -0700 | [diff] [blame] | 108 | sk_tool_utils::platform_font_name( |
| 109 | gFaceStyles[i].fName), SkFontStyle::FromOldStyle(gFaceStyles[i].fStyle)); |
kkinnunen | b4a797f | 2015-05-21 06:15:28 -0700 | [diff] [blame] | 110 | } |
| 111 | } |
| 112 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 113 | SkString onShortName() override { |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 114 | SkString name("typefacestyles"); |
| 115 | if (fApplyKerning) { |
| 116 | name.append("_kerning"); |
| 117 | } |
caryclark | 3721355 | 2015-07-24 11:08:01 -0700 | [diff] [blame] | 118 | name.append(sk_tool_utils::major_platform_os_name()); |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 119 | return name; |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 120 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 121 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 122 | SkISize onISize() override { |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 123 | return SkISize::Make(640, 480); |
| 124 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 125 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 126 | void onDraw(SkCanvas* canvas) override { |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 127 | SkPaint paint; |
| 128 | paint.setAntiAlias(true); |
| 129 | paint.setTextSize(SkIntToScalar(30)); |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 130 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 131 | const char* text = fApplyKerning ? "Type AWAY" : "Hamburgefons"; |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 132 | const size_t textLen = strlen(text); |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 133 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 134 | SkScalar x = SkIntToScalar(10); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 135 | SkScalar dy = paint.getFontMetrics(nullptr); |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 136 | SkScalar y = dy; |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 137 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 138 | if (fApplyKerning) { |
| 139 | paint.setSubpixelText(true); |
| 140 | } else { |
| 141 | paint.setLinearText(true); |
| 142 | } |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 143 | for (int i = 0; i < gFaceStylesCount; i++) { |
| 144 | paint.setTypeface(fFaces[i]); |
| 145 | canvas->drawText(text, textLen, x, y, paint); |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 146 | if (fApplyKerning) { |
| 147 | drawKernText(canvas, text, textLen, x + 240, y, paint); |
| 148 | } |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 149 | y += dy; |
| 150 | } |
| 151 | } |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 152 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 153 | private: |
| 154 | typedef skiagm::GM INHERITED; |
| 155 | }; |
skia.committer@gmail.com | 12eea2b | 2013-02-27 07:10:10 +0000 | [diff] [blame] | 156 | |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 157 | class TypefaceRenderingGM : public skiagm::GM { |
| 158 | sk_sp<SkTypeface> fFace; |
| 159 | |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 160 | protected: |
| 161 | void onOnceBeforeDraw() override { |
| 162 | fFace = MakeResourceAsTypeface("/fonts/hintgasp.ttf"); |
| 163 | } |
| 164 | |
| 165 | SkString onShortName() override { |
| 166 | SkString name("typefacerendering"); |
| 167 | name.append(sk_tool_utils::major_platform_os_name()); |
| 168 | return name; |
| 169 | } |
| 170 | |
| 171 | SkISize onISize() override { |
bungeman | 5dba301 | 2016-07-12 06:55:25 -0700 | [diff] [blame] | 172 | return SkISize::Make(640, 680); |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | void onDraw(SkCanvas* canvas) override { |
| 176 | struct AliasType { |
| 177 | bool antiAlias; |
| 178 | bool subpixelAntitalias; |
| 179 | bool inLayer; |
| 180 | } constexpr aliasTypes[] { |
| 181 | { false, false, false }, // aliased |
| 182 | { true, false, false }, // anti-aliased |
| 183 | { true, true , false }, // subpixel anti-aliased |
| 184 | { true, false, true }, // anti-aliased in layer (flat pixel geometry) |
| 185 | { true, true , true }, // subpixel anti-aliased in layer (flat pixel geometry) |
| 186 | }; |
| 187 | |
| 188 | // The hintgasp.ttf is designed for the following sizes to be different. |
| 189 | // GASP_DOGRAY 0x0002 0<=ppem<=10 |
| 190 | // GASP_SYMMETRIC_SMOOTHING 0x0008 0<=ppem<=10 |
| 191 | // GASP_GRIDFIT 0x0001 11<=ppem<=12 |
| 192 | // GASP_SYMMETRIC_GRIDFIT 0x0004 11<=ppem<=12 |
| 193 | // GASP_DOGRAY|GASP_GRIDFIT 0x0003 13<=ppem<=14 |
| 194 | // GASP_SYMMETRIC_SMOOTHING|GASP_SYMMETRIC_GRIDFIT 0x000C 13<=ppem<=14 |
| 195 | // (neither) 0x0000 15<=ppem |
bungeman | 5dba301 | 2016-07-12 06:55:25 -0700 | [diff] [blame] | 196 | // Odd sizes have embedded bitmaps. |
| 197 | constexpr SkScalar textSizes[] = { 9, 10, 11, 12, 13, 14, 15, 16 }; |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 198 | |
| 199 | constexpr SkPaint::Hinting hintingTypes[] = { SkPaint::kNo_Hinting, |
| 200 | SkPaint::kSlight_Hinting, |
| 201 | SkPaint::kNormal_Hinting, |
| 202 | SkPaint::kFull_Hinting }; |
| 203 | |
| 204 | struct SubpixelType { |
| 205 | bool requested; |
| 206 | SkVector offset; |
| 207 | } constexpr subpixelTypes[] = { |
| 208 | { false, { 0.00, 0.00 } }, |
| 209 | { true , { 0.00, 0.00 } }, |
| 210 | { true , { 0.25, 0.00 } }, |
| 211 | { true , { 0.25, 0.25 } }, |
| 212 | }; |
| 213 | |
| 214 | constexpr bool rotateABitTypes[] = { false, true }; |
| 215 | |
| 216 | SkPaint paint; |
bungeman | 5dba301 | 2016-07-12 06:55:25 -0700 | [diff] [blame] | 217 | paint.setTypeface(fFace); |
| 218 | paint.setEmbeddedBitmapText(true); |
| 219 | |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 220 | SkScalar x = 0; |
| 221 | SkScalar xMax = x; |
| 222 | SkScalar xBase = 0; |
| 223 | SkScalar y = 0; // The baseline of the previous output |
| 224 | for (const SubpixelType subpixel : subpixelTypes) { |
| 225 | y = 0; |
| 226 | paint.setSubpixelText(subpixel.requested); |
| 227 | |
| 228 | for (const AliasType& alias : aliasTypes) { |
| 229 | paint.setAntiAlias(alias.antiAlias); |
| 230 | paint.setLCDRenderText(alias.subpixelAntitalias); |
| 231 | SkAutoCanvasRestore acr(canvas, false); |
| 232 | if (alias.inLayer) { |
| 233 | canvas->saveLayer(nullptr, &paint); |
| 234 | } |
| 235 | |
| 236 | for (const SkScalar& textSize : textSizes) { |
| 237 | x = xBase + 5; |
| 238 | paint.setTextSize(textSize); |
| 239 | |
| 240 | SkScalar dy = SkScalarCeilToScalar(paint.getFontMetrics(nullptr)); |
| 241 | y += dy; |
| 242 | for (const SkPaint::Hinting& hinting : hintingTypes) { |
| 243 | paint.setHinting(hinting); |
| 244 | |
| 245 | for (const bool& rotateABit : rotateABitTypes) { |
| 246 | SkAutoCanvasRestore acr(canvas, true); |
| 247 | if (rotateABit) { |
bungeman | 7438bfc | 2016-07-12 15:01:19 -0700 | [diff] [blame^] | 248 | canvas->rotate(2, x + subpixel.offset.x(), |
| 249 | y + subpixel.offset.y()); |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 250 | } |
| 251 | canvas->drawText("A", 1, x + subpixel.offset.x(), |
| 252 | y + subpixel.offset.y(), paint); |
| 253 | |
| 254 | SkScalar dx = SkScalarCeilToScalar(paint.measureText("A", 1)) + 5; |
| 255 | x += dx; |
| 256 | xMax = SkTMax(x, xMax); |
| 257 | } |
| 258 | } |
| 259 | } |
| 260 | y += 10; |
| 261 | } |
| 262 | xBase = xMax; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | private: |
| 267 | typedef skiagm::GM INHERITED; |
| 268 | }; |
| 269 | |
reed@google.com | 92abe48 | 2013-02-26 16:57:16 +0000 | [diff] [blame] | 270 | /////////////////////////////////////////////////////////////////////////////// |
| 271 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 272 | DEF_GM( return new TypefaceStylesGM(false); ) |
| 273 | DEF_GM( return new TypefaceStylesGM(true); ) |
bungeman | 61457a6 | 2016-07-06 11:55:05 -0700 | [diff] [blame] | 274 | DEF_GM( return new TypefaceRenderingGM(); ) |