e3f1b59d9f
BUG=skia:7941 Change-Id: I500561c2fec1bcab324fd9519f1d20d356afdfb5 Reviewed-on: https://skia-review.googlesource.com/127500 Commit-Queue: Ben Wagner <bungeman@google.com> Reviewed-by: Herb Derby <herb@google.com>
384 lines
13 KiB
C++
384 lines
13 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "sk_tool_utils.h"
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#include "Resources.h"
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#include "SkBlurTypes.h"
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#include "SkCanvas.h"
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#include "SkFontStyle.h"
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#include "SkMaskFilter.h"
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#include "SkString.h"
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#include "SkSurfaceProps.h"
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#include "SkTypeface.h"
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#include "SkTypes.h"
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static void getGlyphPositions(const SkPaint& paint, const uint16_t glyphs[],
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int count, SkScalar x, SkScalar y, SkPoint pos[]) {
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SkASSERT(SkPaint::kGlyphID_TextEncoding == paint.getTextEncoding());
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SkAutoSTMalloc<128, SkScalar> widthStorage(count);
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SkScalar* widths = widthStorage.get();
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paint.getTextWidths(glyphs, count * sizeof(uint16_t), widths);
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for (int i = 0; i < count; ++i) {
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pos[i].set(x, y);
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x += widths[i];
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}
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}
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static void applyKerning(SkPoint pos[], const int32_t adjustments[], int count,
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const SkPaint& paint) {
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SkScalar scale = paint.getTextSize() / paint.getTypeface()->getUnitsPerEm();
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SkScalar globalAdj = 0;
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for (int i = 0; i < count - 1; ++i) {
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globalAdj += adjustments[i] * scale;
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pos[i + 1].fX += globalAdj;
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}
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}
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static void drawKernText(SkCanvas* canvas, const void* text, size_t len,
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SkScalar x, SkScalar y, const SkPaint& paint) {
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SkTypeface* face = paint.getTypeface();
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if (!face) {
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canvas->drawText(text, len, x, y, paint);
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return;
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}
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SkAutoSTMalloc<128, uint16_t> glyphStorage(len);
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uint16_t* glyphs = glyphStorage.get();
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int glyphCount = paint.textToGlyphs(text, len, glyphs);
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if (glyphCount < 1) {
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return;
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}
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SkAutoSTMalloc<128, int32_t> adjustmentStorage(glyphCount - 1);
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int32_t* adjustments = adjustmentStorage.get();
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if (!face->getKerningPairAdjustments(glyphs, glyphCount, adjustments)) {
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canvas->drawText(text, len, x, y, paint);
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return;
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}
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SkPaint glyphPaint(paint);
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glyphPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
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SkAutoSTMalloc<128, SkPoint> posStorage(glyphCount);
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SkPoint* pos = posStorage.get();
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getGlyphPositions(glyphPaint, glyphs, glyphCount, x, y, pos);
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applyKerning(pos, adjustments, glyphCount, glyphPaint);
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canvas->drawPosText(glyphs, glyphCount * sizeof(uint16_t), pos, glyphPaint);
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}
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static constexpr SkFontStyle gStyles[] = {
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SkFontStyle::Normal(),
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SkFontStyle::Bold(),
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SkFontStyle::Italic(),
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SkFontStyle::BoldItalic(),
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};
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constexpr int gStylesCount = SK_ARRAY_COUNT(gStyles);
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class TypefaceStylesGM : public skiagm::GM {
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sk_sp<SkTypeface> fFaces[gStylesCount];
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bool fApplyKerning;
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public:
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TypefaceStylesGM(bool applyKerning)
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: fApplyKerning(applyKerning) {
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memset(fFaces, 0, sizeof(fFaces));
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}
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protected:
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void onOnceBeforeDraw() override {
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for (int i = 0; i < gStylesCount; i++) {
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fFaces[i] = SkTypeface::MakeFromName(nullptr, gStyles[i]);
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}
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}
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SkString onShortName() override {
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SkString name("typefacestyles");
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if (fApplyKerning) {
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name.append("_kerning");
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}
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name.append(sk_tool_utils::platform_font_manager());
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return name;
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}
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SkISize onISize() override {
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return SkISize::Make(640, 480);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setTextSize(SkIntToScalar(30));
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const char* text = fApplyKerning ? "Type AWAY" : "Hamburgefons";
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const size_t textLen = strlen(text);
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SkScalar x = SkIntToScalar(10);
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SkScalar dy = paint.getFontMetrics(nullptr);
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SkScalar y = dy;
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if (fApplyKerning) {
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paint.setSubpixelText(true);
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} else {
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paint.setLinearText(true);
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}
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for (int i = 0; i < gStylesCount; i++) {
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paint.setTypeface(fFaces[i]);
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canvas->drawText(text, textLen, x, y, paint);
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if (fApplyKerning) {
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drawKernText(canvas, text, textLen, x + 240, y, paint);
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}
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y += dy;
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}
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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DEF_GM( return new TypefaceStylesGM(false); )
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DEF_GM( return new TypefaceStylesGM(true); )
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////////////////////////////////////////////////////////////////////////////////
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static void draw_typeface_rendering_gm(SkCanvas* canvas, sk_sp<SkTypeface> face,
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char character = 'A') {
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struct AliasType {
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bool antiAlias;
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bool subpixelAntitalias;
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bool inLayer;
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} constexpr aliasTypes[] {
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#ifndef SK_BUILD_FOR_IOS
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// This gm crashes on iOS when drawing an embedded bitmap when requesting aliased rendering.
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// The crash looks like
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// libTrueTypeScaler.dylib`<redacted> + 80
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// stop reason = EXC_BAD_ACCESS (code=EXC_ARM_DA_ALIGN, address=...)
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// -> 0x330b19d0 <+80>: strd r2, r3, [r5, #36]
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// 0x330b19d4 <+84>: movs r3, #0x0
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// 0x330b19d6 <+86>: add r2, sp, #0x28
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// 0x330b19d8 <+88>: ldr r0, [r4, #0x4]
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// Disable testing embedded bitmaps on iOS for now.
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// See https://bug.skia.org/5530 .
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{ false, false, false }, // aliased
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#endif
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{ true, false, false }, // anti-aliased
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{ true, true , false }, // subpixel anti-aliased
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{ true, false, true }, // anti-aliased in layer (flat pixel geometry)
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{ true, true , true }, // subpixel anti-aliased in layer (flat pixel geometry)
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};
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// The hintgasp.ttf is designed for the following sizes to be different.
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// GASP_DOGRAY 0x0002 0<=ppem<=10
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// GASP_SYMMETRIC_SMOOTHING 0x0008 0<=ppem<=10
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// GASP_GRIDFIT 0x0001 11<=ppem<=12
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// GASP_SYMMETRIC_GRIDFIT 0x0004 11<=ppem<=12
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// GASP_DOGRAY|GASP_GRIDFIT 0x0003 13<=ppem<=14
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// GASP_SYMMETRIC_SMOOTHING|GASP_SYMMETRIC_GRIDFIT 0x000C 13<=ppem<=14
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// (neither) 0x0000 15<=ppem
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// Odd sizes have embedded bitmaps.
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constexpr SkScalar textSizes[] = { 9, 10, 11, 12, 13, 14, 15, 16 };
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constexpr SkPaint::Hinting hintingTypes[] = { SkPaint::kNo_Hinting,
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SkPaint::kSlight_Hinting,
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SkPaint::kNormal_Hinting,
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SkPaint::kFull_Hinting };
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struct SubpixelType {
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bool requested;
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SkVector offset;
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} constexpr subpixelTypes[] = {
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{ false, { 0.00, 0.00 } },
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{ true , { 0.00, 0.00 } },
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{ true , { 0.25, 0.00 } },
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{ true , { 0.25, 0.25 } },
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};
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constexpr bool rotateABitTypes[] = { false, true };
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SkScalar y = 0; // The baseline of the previous output
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{
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SkPaint paint;
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paint.setTypeface(face);
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paint.setEmbeddedBitmapText(true);
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SkScalar x = 0;
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SkScalar xMax = x;
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SkScalar xBase = 0;
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for (const SubpixelType subpixel : subpixelTypes) {
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y = 0;
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paint.setSubpixelText(subpixel.requested);
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for (const AliasType& alias : aliasTypes) {
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paint.setAntiAlias(alias.antiAlias);
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paint.setLCDRenderText(alias.subpixelAntitalias);
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SkAutoCanvasRestore acr(canvas, false);
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if (alias.inLayer) {
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canvas->saveLayer(nullptr, &paint);
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}
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for (const SkScalar& textSize : textSizes) {
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x = xBase + 5;
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paint.setTextSize(textSize);
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SkScalar dy = SkScalarCeilToScalar(paint.getFontMetrics(nullptr));
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y += dy;
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for (const SkPaint::Hinting& hinting : hintingTypes) {
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paint.setHinting(hinting);
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for (const bool& rotateABit : rotateABitTypes) {
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SkAutoCanvasRestore acr(canvas, true);
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if (rotateABit) {
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canvas->rotate(2, x + subpixel.offset.x(),
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y + subpixel.offset.y());
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}
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canvas->drawText(&character, 1, x + subpixel.offset.x(),
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y + subpixel.offset.y(), paint);
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SkScalar dx = SkScalarCeilToScalar(
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paint.measureText(&character, 1)) + 5;
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x += dx;
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xMax = SkTMax(x, xMax);
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}
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}
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}
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y += 10;
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}
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xBase = xMax;
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}
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}
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constexpr struct StyleTests {
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SkPaint::Style style;
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SkScalar strokeWidth;
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} styleTypes[] = {
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{ SkPaint::kFill_Style, 0.0f},
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{ SkPaint::kStroke_Style, 0.0f},
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{ SkPaint::kStroke_Style, 0.5f},
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{ SkPaint::kStrokeAndFill_Style, 1.0f},
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};
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constexpr bool fakeBoldTypes[] = { false, true };
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{
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SkPaint paint;
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paint.setTypeface(face);
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paint.setTextSize(16);
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SkScalar x = 0;
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for (const bool& fakeBold : fakeBoldTypes) {
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SkScalar dy = SkScalarCeilToScalar(paint.getFontMetrics(nullptr));
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y += dy;
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x = 5;
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paint.setFakeBoldText(fakeBold);
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for (const AliasType& alias : aliasTypes) {
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paint.setAntiAlias(alias.antiAlias);
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paint.setLCDRenderText(alias.subpixelAntitalias);
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SkAutoCanvasRestore acr(canvas, false);
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if (alias.inLayer) {
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canvas->saveLayer(nullptr, &paint);
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}
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for (const StyleTests& style : styleTypes) {
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paint.setStyle(style.style);
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paint.setStrokeWidth(style.strokeWidth);
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canvas->drawText(&character, 1, x, y, paint);
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SkScalar dx = SkScalarCeilToScalar(paint.measureText(&character, 1)) + 5;
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x += dx;
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}
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}
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y += 10;
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}
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}
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constexpr struct MaskTests {
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SkBlurStyle style;
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SkScalar sigma;
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} maskTypes[] = {
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{ SkBlurStyle::kNormal_SkBlurStyle, 0.0f},
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{ SkBlurStyle::kSolid_SkBlurStyle, 0.0f},
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{ SkBlurStyle::kOuter_SkBlurStyle, 0.0f},
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{ SkBlurStyle::kInner_SkBlurStyle, 0.0f},
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{ SkBlurStyle::kNormal_SkBlurStyle, 0.5f},
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{ SkBlurStyle::kSolid_SkBlurStyle, 0.5f},
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{ SkBlurStyle::kOuter_SkBlurStyle, 0.5f},
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{ SkBlurStyle::kInner_SkBlurStyle, 0.5f},
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{ SkBlurStyle::kNormal_SkBlurStyle, 2.0f},
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{ SkBlurStyle::kSolid_SkBlurStyle, 2.0f},
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{ SkBlurStyle::kOuter_SkBlurStyle, 2.0f},
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{ SkBlurStyle::kInner_SkBlurStyle, 2.0f},
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};
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{
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SkPaint paint;
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paint.setTypeface(face);
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paint.setTextSize(16);
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SkScalar x = 0;
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{
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for (const AliasType& alias : aliasTypes) {
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SkScalar dy = SkScalarCeilToScalar(paint.getFontMetrics(nullptr));
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y += dy;
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x = 5;
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paint.setAntiAlias(alias.antiAlias);
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paint.setLCDRenderText(alias.subpixelAntitalias);
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SkAutoCanvasRestore acr(canvas, false);
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if (alias.inLayer) {
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canvas->saveLayer(nullptr, &paint);
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}
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for (const MaskTests& mask : maskTypes) {
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paint.setMaskFilter(SkMaskFilter::MakeBlur(mask.style, mask.sigma));
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canvas->drawText(&character, 1, x, y, paint);
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SkScalar dx = SkScalarCeilToScalar(paint.measureText(&character, 1)) + 5;
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x += dx;
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}
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paint.setMaskFilter(nullptr);
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}
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y += 10;
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}
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}
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}
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DEF_SIMPLE_GM_BG_NAME(typefacerendering, canvas, 640, 840, SK_ColorWHITE,
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SkStringPrintf("typefacerendering%s",
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sk_tool_utils::platform_font_manager())) {
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if (sk_sp<SkTypeface> face = MakeResourceAsTypeface("fonts/hintgasp.ttf")) {
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draw_typeface_rendering_gm(canvas, std::move(face));
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}
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}
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// Type1 fonts don't currently work in Skia on Windows.
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#ifndef SK_BUILD_FOR_WIN
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DEF_SIMPLE_GM_BG_NAME(typefacerendering_pfa, canvas, 640, 840, SK_ColorWHITE,
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SkStringPrintf("typefacerendering_pfa%s",
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sk_tool_utils::platform_font_manager())) {
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if (sk_sp<SkTypeface> face = MakeResourceAsTypeface("fonts/Roboto2-Regular.pfa")) {
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// This subsetted typeface doesn't have the character 'A'.
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draw_typeface_rendering_gm(canvas, std::move(face), 'O');
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}
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}
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DEF_SIMPLE_GM_BG_NAME(typefacerendering_pfb, canvas, 640, 840, SK_ColorWHITE,
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SkStringPrintf("typefacerendering_pfb%s",
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sk_tool_utils::platform_font_manager())) {
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if (sk_sp<SkTypeface> face = MakeResourceAsTypeface("fonts/Roboto2-Regular.pfb")) {
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draw_typeface_rendering_gm(canvas, std::move(face), 'O');
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}
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}
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#endif
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