| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "sk_tool_utils.h" |
| #include "Resources.h" |
| #include "SkBlurTypes.h" |
| #include "SkCanvas.h" |
| #include "SkFontStyle.h" |
| #include "SkMaskFilter.h" |
| #include "SkString.h" |
| #include "SkSurfaceProps.h" |
| #include "SkTextBlob.h" |
| #include "SkTypeface.h" |
| #include "SkTypes.h" |
| |
| static void getGlyphPositions(const SkFont& font, const uint16_t glyphs[], |
| int count, SkScalar x, SkScalar y, SkPoint pos[]) { |
| SkAutoSTMalloc<128, SkScalar> widthStorage(count); |
| SkScalar* widths = widthStorage.get(); |
| font.getWidths(glyphs, count, widths); |
| |
| for (int i = 0; i < count; ++i) { |
| pos[i].set(x, y); |
| x += widths[i]; |
| } |
| } |
| |
| static void applyKerning(SkPoint pos[], const int32_t adjustments[], int count, |
| const SkFont& font) { |
| SkScalar scale = font.getSize() / font.getTypefaceOrDefault()->getUnitsPerEm(); |
| |
| SkScalar globalAdj = 0; |
| for (int i = 0; i < count - 1; ++i) { |
| globalAdj += adjustments[i] * scale; |
| pos[i + 1].fX += globalAdj; |
| } |
| } |
| |
| static void drawKernText(SkCanvas* canvas, const void* text, size_t len, |
| SkScalar x, SkScalar y, const SkFont& font, const SkPaint& paint) { |
| SkTypeface* face = font.getTypefaceOrDefault(); |
| if (!face) { |
| canvas->drawSimpleText(text, len, kUTF8_SkTextEncoding, x, y, font, paint); |
| return; |
| } |
| |
| SkAutoSTMalloc<128, uint16_t> glyphStorage(len); |
| uint16_t* glyphs = glyphStorage.get(); |
| int glyphCount = font.textToGlyphs(text, len, kUTF8_SkTextEncoding, glyphs, len); |
| if (glyphCount < 1) { |
| return; |
| } |
| |
| SkAutoSTMalloc<128, int32_t> adjustmentStorage(glyphCount - 1); |
| int32_t* adjustments = adjustmentStorage.get(); |
| if (!face->getKerningPairAdjustments(glyphs, glyphCount, adjustments)) { |
| canvas->drawSimpleText(text, len, kUTF8_SkTextEncoding, x, y, font, paint); |
| return; |
| } |
| |
| |
| SkTextBlobBuilder builder; |
| auto rec = builder.allocRunPos(font, glyphCount); |
| memcpy(rec.glyphs, glyphs, glyphCount * sizeof(SkGlyphID)); |
| getGlyphPositions(font, glyphs, glyphCount, x, y, rec.points()); |
| applyKerning(rec.points(), adjustments, glyphCount, font); |
| |
| canvas->drawTextBlob(builder.make(), 0, 0, paint); |
| } |
| |
| static constexpr SkFontStyle gStyles[] = { |
| SkFontStyle::Normal(), |
| SkFontStyle::Bold(), |
| SkFontStyle::Italic(), |
| SkFontStyle::BoldItalic(), |
| }; |
| |
| constexpr int gStylesCount = SK_ARRAY_COUNT(gStyles); |
| |
| class TypefaceStylesGM : public skiagm::GM { |
| sk_sp<SkTypeface> fFaces[gStylesCount]; |
| bool fApplyKerning; |
| |
| public: |
| TypefaceStylesGM(bool applyKerning) : fApplyKerning(applyKerning) {} |
| |
| protected: |
| void onOnceBeforeDraw() override { |
| for (int i = 0; i < gStylesCount; i++) { |
| fFaces[i] = SkTypeface::MakeFromName(nullptr, gStyles[i]); |
| } |
| } |
| |
| SkString onShortName() override { |
| SkString name("typefacestyles"); |
| if (fApplyKerning) { |
| name.append("_kerning"); |
| } |
| name.append(sk_tool_utils::platform_font_manager()); |
| return name; |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(640, 480); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkFont font; |
| font.setSize(30); |
| |
| const char* text = fApplyKerning ? "Type AWAY" : "Hamburgefons"; |
| const size_t textLen = strlen(text); |
| |
| SkScalar x = SkIntToScalar(10); |
| SkScalar dy = font.getMetrics(nullptr); |
| SkScalar y = dy; |
| |
| if (fApplyKerning) { |
| font.setSubpixel(true); |
| } else { |
| font.setLinearMetrics(true); |
| } |
| |
| SkPaint paint; |
| for (int i = 0; i < gStylesCount; i++) { |
| font.setTypeface(fFaces[i]); |
| canvas->drawSimpleText(text, textLen, kUTF8_SkTextEncoding, x, y, font, paint); |
| if (fApplyKerning) { |
| drawKernText(canvas, text, textLen, x + 240, y, font, paint); |
| } |
| y += dy; |
| } |
| } |
| |
| private: |
| typedef skiagm::GM INHERITED; |
| }; |
| |
| DEF_GM( return new TypefaceStylesGM(false); ) |
| DEF_GM( return new TypefaceStylesGM(true); ) |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| static void draw_typeface_rendering_gm(SkCanvas* canvas, sk_sp<SkTypeface> face, |
| char character = 'A') { |
| struct AliasType { |
| bool antiAlias; |
| bool subpixelAntitalias; |
| bool inLayer; |
| } constexpr aliasTypes[] { |
| #ifndef SK_BUILD_FOR_IOS |
| // This gm crashes on iOS when drawing an embedded bitmap when requesting aliased rendering. |
| // The crash looks like |
| // libTrueTypeScaler.dylib`<redacted> + 80 |
| // stop reason = EXC_BAD_ACCESS (code=EXC_ARM_DA_ALIGN, address=...) |
| // -> 0x330b19d0 <+80>: strd r2, r3, [r5, #36] |
| // 0x330b19d4 <+84>: movs r3, #0x0 |
| // 0x330b19d6 <+86>: add r2, sp, #0x28 |
| // 0x330b19d8 <+88>: ldr r0, [r4, #0x4] |
| // Disable testing embedded bitmaps on iOS for now. |
| // See https://bug.skia.org/5530 . |
| { false, false, false }, // aliased |
| #endif |
| { true, false, false }, // anti-aliased |
| { true, true , false }, // subpixel anti-aliased |
| { true, false, true }, // anti-aliased in layer (flat pixel geometry) |
| { true, true , true }, // subpixel anti-aliased in layer (flat pixel geometry) |
| }; |
| |
| auto compute_edging = [](AliasType at) { |
| if (at.antiAlias) { |
| if (at.subpixelAntitalias) { |
| return SkFont::Edging::kSubpixelAntiAlias; |
| } else { |
| return SkFont::Edging::kAntiAlias; |
| } |
| } else { |
| return SkFont::Edging::kAlias; |
| } |
| }; |
| |
| // The hintgasp.ttf is designed for the following sizes to be different. |
| // GASP_DOGRAY 0x0002 0<=ppem<=10 |
| // GASP_SYMMETRIC_SMOOTHING 0x0008 0<=ppem<=10 |
| // GASP_GRIDFIT 0x0001 11<=ppem<=12 |
| // GASP_SYMMETRIC_GRIDFIT 0x0004 11<=ppem<=12 |
| // GASP_DOGRAY|GASP_GRIDFIT 0x0003 13<=ppem<=14 |
| // GASP_SYMMETRIC_SMOOTHING|GASP_SYMMETRIC_GRIDFIT 0x000C 13<=ppem<=14 |
| // (neither) 0x0000 15<=ppem |
| // Odd sizes have embedded bitmaps. |
| constexpr SkScalar textSizes[] = { 9, 10, 11, 12, 13, 14, 15, 16 }; |
| |
| constexpr SkFontHinting hintingTypes[] = { |
| kNo_SkFontHinting, |
| kSlight_SkFontHinting, |
| kNormal_SkFontHinting, |
| kFull_SkFontHinting |
| }; |
| |
| struct SubpixelType { |
| bool requested; |
| SkVector offset; |
| } constexpr subpixelTypes[] = { |
| { false, { 0.00, 0.00 } }, |
| { true , { 0.00, 0.00 } }, |
| { true , { 0.25, 0.00 } }, |
| { true , { 0.25, 0.25 } }, |
| }; |
| |
| constexpr bool rotateABitTypes[] = { false, true }; |
| |
| SkScalar y = 0; // The baseline of the previous output |
| { |
| SkPaint paint; |
| |
| SkFont font(face); |
| font.setEmbeddedBitmaps(true); |
| |
| SkScalar x = 0; |
| SkScalar xMax = x; |
| SkScalar xBase = 0; |
| for (const SubpixelType subpixel : subpixelTypes) { |
| y = 0; |
| font.setSubpixel(subpixel.requested); |
| |
| for (const AliasType& alias : aliasTypes) { |
| font.setEdging(compute_edging(alias)); |
| SkAutoCanvasRestore acr(canvas, false); |
| if (alias.inLayer) { |
| canvas->saveLayer(nullptr, &paint); |
| } |
| |
| for (const SkScalar& textSize : textSizes) { |
| x = xBase + 5; |
| font.setSize(textSize); |
| |
| SkScalar dy = SkScalarCeilToScalar(font.getMetrics(nullptr)); |
| y += dy; |
| for (const SkFontHinting& hinting : hintingTypes) { |
| font.setHinting(hinting); |
| |
| for (const bool& rotateABit : rotateABitTypes) { |
| SkAutoCanvasRestore acr(canvas, true); |
| if (rotateABit) { |
| canvas->rotate(2, x + subpixel.offset.x(), |
| y + subpixel.offset.y()); |
| } |
| canvas->drawSimpleText(&character, 1, kUTF8_SkTextEncoding, |
| x + subpixel.offset.x(), |
| y + subpixel.offset.y(), font, paint); |
| |
| SkScalar dx = SkScalarCeilToScalar( |
| font.measureText(&character, 1, kUTF8_SkTextEncoding)) + 5; |
| x += dx; |
| xMax = SkTMax(x, xMax); |
| } |
| } |
| } |
| y += 10; |
| } |
| xBase = xMax; |
| } |
| } |
| |
| constexpr struct StyleTests { |
| SkPaint::Style style; |
| SkScalar strokeWidth; |
| } styleTypes[] = { |
| { SkPaint::kFill_Style, 0.0f}, |
| { SkPaint::kStroke_Style, 0.0f}, |
| { SkPaint::kStroke_Style, 0.5f}, |
| { SkPaint::kStrokeAndFill_Style, 1.0f}, |
| }; |
| |
| constexpr bool fakeBoldTypes[] = { false, true }; |
| |
| { |
| SkPaint paint; |
| |
| SkFont font(face, 16); |
| |
| SkScalar x = 0; |
| for (const bool& fakeBold : fakeBoldTypes) { |
| SkScalar dy = SkScalarCeilToScalar(font.getMetrics(nullptr)); |
| y += dy; |
| x = 5; |
| |
| font.setEmbolden(fakeBold); |
| for (const AliasType& alias : aliasTypes) { |
| font.setEdging(compute_edging(alias)); |
| SkAutoCanvasRestore acr(canvas, false); |
| if (alias.inLayer) { |
| canvas->saveLayer(nullptr, &paint); |
| } |
| for (const StyleTests& style : styleTypes) { |
| paint.setStyle(style.style); |
| paint.setStrokeWidth(style.strokeWidth); |
| canvas->drawSimpleText(&character, 1, kUTF8_SkTextEncoding, x, y, font, paint); |
| |
| SkScalar dx = SkScalarCeilToScalar(font.measureText(&character, 1, |
| kUTF8_SkTextEncoding)) + 5; |
| x += dx; |
| } |
| } |
| y += 10; |
| } |
| } |
| |
| constexpr struct MaskTests { |
| SkBlurStyle style; |
| SkScalar sigma; |
| } maskTypes[] = { |
| { SkBlurStyle::kNormal_SkBlurStyle, 0.0f}, |
| { SkBlurStyle::kSolid_SkBlurStyle, 0.0f}, |
| { SkBlurStyle::kOuter_SkBlurStyle, 0.0f}, |
| { SkBlurStyle::kInner_SkBlurStyle, 0.0f}, |
| |
| { SkBlurStyle::kNormal_SkBlurStyle, 0.5f}, |
| { SkBlurStyle::kSolid_SkBlurStyle, 0.5f}, |
| { SkBlurStyle::kOuter_SkBlurStyle, 0.5f}, |
| { SkBlurStyle::kInner_SkBlurStyle, 0.5f}, |
| |
| { SkBlurStyle::kNormal_SkBlurStyle, 2.0f}, |
| { SkBlurStyle::kSolid_SkBlurStyle, 2.0f}, |
| { SkBlurStyle::kOuter_SkBlurStyle, 2.0f}, |
| { SkBlurStyle::kInner_SkBlurStyle, 2.0f}, |
| }; |
| |
| { |
| SkPaint paint; |
| |
| SkFont font(face, 16); |
| |
| SkScalar x = 0; |
| { |
| for (const AliasType& alias : aliasTypes) { |
| SkScalar dy = SkScalarCeilToScalar(font.getMetrics(nullptr)); |
| y += dy; |
| x = 5; |
| |
| font.setEdging(compute_edging(alias)); |
| SkAutoCanvasRestore acr(canvas, false); |
| if (alias.inLayer) { |
| canvas->saveLayer(nullptr, &paint); |
| } |
| for (const MaskTests& mask : maskTypes) { |
| paint.setMaskFilter(SkMaskFilter::MakeBlur(mask.style, mask.sigma)); |
| canvas->drawSimpleText(&character, 1, kUTF8_SkTextEncoding, x, y, font, paint); |
| |
| SkScalar dx = SkScalarCeilToScalar(font.measureText(&character, 1, |
| kUTF8_SkTextEncoding)) + 5; |
| x += dx; |
| } |
| paint.setMaskFilter(nullptr); |
| } |
| y += 10; |
| } |
| } |
| } |
| |
| DEF_SIMPLE_GM_BG_NAME(typefacerendering, canvas, 640, 840, SK_ColorWHITE, |
| SkStringPrintf("typefacerendering%s", |
| sk_tool_utils::platform_font_manager())) { |
| if (sk_sp<SkTypeface> face = MakeResourceAsTypeface("fonts/hintgasp.ttf")) { |
| draw_typeface_rendering_gm(canvas, std::move(face)); |
| } |
| } |
| |
| // Type1 fonts don't currently work in Skia on Windows. |
| #ifndef SK_BUILD_FOR_WIN |
| |
| DEF_SIMPLE_GM_BG_NAME(typefacerendering_pfa, canvas, 640, 840, SK_ColorWHITE, |
| SkStringPrintf("typefacerendering_pfa%s", |
| sk_tool_utils::platform_font_manager())) { |
| if (sk_sp<SkTypeface> face = MakeResourceAsTypeface("fonts/Roboto2-Regular.pfa")) { |
| // This subsetted typeface doesn't have the character 'A'. |
| draw_typeface_rendering_gm(canvas, std::move(face), 'O'); |
| } |
| } |
| |
| DEF_SIMPLE_GM_BG_NAME(typefacerendering_pfb, canvas, 640, 840, SK_ColorWHITE, |
| SkStringPrintf("typefacerendering_pfb%s", |
| sk_tool_utils::platform_font_manager())) { |
| if (sk_sp<SkTypeface> face = MakeResourceAsTypeface("fonts/Roboto2-Regular.pfb")) { |
| draw_typeface_rendering_gm(canvas, std::move(face), 'O'); |
| } |
| } |
| |
| #endif |
