dbfd7ab108
'static const' means, there must be at most one of these, and initialize it at compile time if possible or runtime if necessary. This leads to unexpected code execution, and TSAN* will complain about races on the guard variables. Generally 'constexpr' or 'const' are better choices. Neither can cause races: they're either intialized at compile time (constexpr) or intialized each time independently (const). This CL prefers constexpr where possible, and uses const where not. It even prefers constexpr over const where they don't make a difference... I want to have lots of examples of constexpr for people to see and mimic. The scoped-to-class static has nothing to do with any of this, and is not changed. * Not yet on the bots, which use an older TSAN. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2300623005 Review-Url: https://codereview.chromium.org/2300623005
287 lines
9.9 KiB
C++
287 lines
9.9 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 "Resources.h"
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#include "SkCanvas.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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constexpr struct {
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const char* fName;
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SkTypeface::Style fStyle;
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} gFaceStyles[] = {
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{ "sans-serif", SkTypeface::kNormal },
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{ "sans-serif", SkTypeface::kBold },
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{ "sans-serif", SkTypeface::kItalic },
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{ "sans-serif", SkTypeface::kBoldItalic },
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{ "serif", SkTypeface::kNormal },
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{ "serif", SkTypeface::kBold },
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{ "serif", SkTypeface::kItalic },
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{ "serif", SkTypeface::kBoldItalic },
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{ "monospace", SkTypeface::kNormal },
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{ "monospace", SkTypeface::kBold },
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{ "monospace", SkTypeface::kItalic },
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{ "monospace", SkTypeface::kBoldItalic },
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};
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constexpr int gFaceStylesCount = SK_ARRAY_COUNT(gFaceStyles);
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class TypefaceStylesGM : public skiagm::GM {
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sk_sp<SkTypeface> fFaces[gFaceStylesCount];
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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 < gFaceStylesCount; i++) {
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fFaces[i] = SkTypeface::MakeFromName(
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sk_tool_utils::platform_font_name(
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gFaceStyles[i].fName), SkFontStyle::FromOldStyle(gFaceStyles[i].fStyle));
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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::major_platform_os_name());
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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 < gFaceStylesCount; 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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class TypefaceRenderingGM : public skiagm::GM {
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sk_sp<SkTypeface> fFace;
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protected:
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void onOnceBeforeDraw() override {
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fFace = MakeResourceAsTypeface("/fonts/hintgasp.ttf");
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}
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SkString onShortName() override {
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SkString name("typefacerendering");
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name.append(sk_tool_utils::major_platform_os_name());
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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, 680);
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}
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void onDraw(SkCanvas* canvas) override {
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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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SkPaint paint;
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paint.setTypeface(fFace);
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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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SkScalar y = 0; // The baseline of the previous output
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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("A", 1, x + subpixel.offset.x(),
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y + subpixel.offset.y(), paint);
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SkScalar dx = SkScalarCeilToScalar(paint.measureText("A", 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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private:
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typedef skiagm::GM INHERITED;
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};
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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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DEF_GM( return new TypefaceRenderingGM(); )
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