9f545bc18a
Adds an option to GrDrawOpAtlas to disable multitexturing. Adds option to GrContextOptions to disable multitexturing for glyph atlases. Change-Id: If413ab7061538fa0e75628d252be4fd14215b6ba Reviewed-on: https://skia-review.googlesource.com/67802 Reviewed-by: Jim Van Verth <jvanverth@google.com> Commit-Queue: Brian Salomon <bsalomon@google.com>
119 lines
4.0 KiB
C++
119 lines
4.0 KiB
C++
/*
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* Copyright 2013 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 "GrContext.h"
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#include "GrContextOptions.h"
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#include "SkCanvas.h"
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#include "SkGraphics.h"
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#include "SkImage.h"
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#include "SkTypeface.h"
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#include "gm.h"
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#include "sk_tool_utils.h"
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// GM to stress the GPU font cache
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static SkScalar draw_string(SkCanvas* canvas, const SkString& text, SkScalar x,
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SkScalar y, const SkPaint& paint) {
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canvas->drawString(text, x, y, paint);
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return x + paint.measureText(text.c_str(), text.size());
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}
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class FontCacheGM : public skiagm::GM {
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public:
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FontCacheGM() { this->setBGColor(SK_ColorLTGRAY); }
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void modifyGrContextOptions(GrContextOptions* options) override {
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options->fGlyphCacheTextureMaximumBytes = 0;
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options->fAllowMultipleGlyphCacheTextures = GrContextOptions::Enable::kNo;
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}
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protected:
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SkString onShortName() override {
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return SkString("fontcache");
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}
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SkISize onISize() override { return SkISize::Make(kSize, kSize); }
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void onOnceBeforeDraw() override {
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fTypefaces[0] = sk_tool_utils::create_portable_typeface("serif", SkFontStyle::Italic());
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fTypefaces[1] = sk_tool_utils::create_portable_typeface("sans-serif",SkFontStyle::Italic());
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fTypefaces[2] = sk_tool_utils::create_portable_typeface("serif", SkFontStyle::Normal());
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fTypefaces[3] =
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sk_tool_utils::create_portable_typeface("sans-serif", SkFontStyle::Normal());
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fTypefaces[4] = sk_tool_utils::create_portable_typeface("serif", SkFontStyle::Bold());
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fTypefaces[5] = sk_tool_utils::create_portable_typeface("sans-serif", SkFontStyle::Bold());
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->clear(SK_ColorLTGRAY);
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this->drawText(canvas);
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// Debugging tool for GPU.
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static const bool kShowAtlas = false;
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if (kShowAtlas) {
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if (auto ctx = canvas->getGrContext()) {
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auto img = ctx->getFontAtlasImage_ForTesting(kA8_GrMaskFormat);
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canvas->drawImage(img, 0, 0);
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}
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}
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}
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private:
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void drawText(SkCanvas* canvas) {
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static const int kSizes[] = {8, 9, 10, 11, 12, 13, 18, 20, 25};
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static const SkString kTexts[] = {SkString("ABCDEFGHIJKLMNOPQRSTUVWXYZ"),
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SkString("abcdefghijklmnopqrstuvwxyz"),
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SkString("0123456789"),
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SkString("!@#$%^&*()<>[]{}")};
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setLCDRenderText(false);
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paint.setSubpixelText(true);
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static const SkScalar kSubPixelInc = 1 / 2.f;
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SkScalar x = 0;
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SkScalar y = 10;
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SkScalar subpixelX = 0;
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SkScalar subpixelY = 0;
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bool offsetX = true;
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do {
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for (auto s : kSizes) {
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auto size = 2 * s;
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paint.setTextSize(size);
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for (const auto& typeface : fTypefaces) {
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paint.setTypeface(typeface);
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for (const auto& text : kTexts) {
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x = size + draw_string(canvas, text, x + subpixelX, y + subpixelY, paint);
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x = SkScalarCeilToScalar(x);
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if (x + 100 > kSize) {
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x = 0;
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y += SkScalarCeilToScalar(size + 3);
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if (y > kSize) {
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return;
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}
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}
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}
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}
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(offsetX ? subpixelX : subpixelY) += kSubPixelInc;
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offsetX = !offsetX;
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}
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} while (true);
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}
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static constexpr SkScalar kSize = 1280;
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sk_sp<SkTypeface> fTypefaces[6];
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typedef GM INHERITED;
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};
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constexpr SkScalar FontCacheGM::kSize;
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new FontCacheGM;)
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