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119 lines
3.6 KiB
119 lines
3.6 KiB
4 months ago
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/*
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* Copyright 2018 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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// GM to stress TextBlob regeneration and the GPU font cache
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// It's not necessary to run this with CPU configs
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//
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// The point here is to draw a set of text that will fit in one Plot, and then some large
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// text. After a flush we draw the first set of text again with a slightly different color,
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// and then enough new large text to spill the entire atlas. What *should* happen is that
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// the Plot with the first set of text will not get overwritten by the new large text.
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#include "gm.h"
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#include "GrContext.h"
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#include "GrContextPriv.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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static sk_sp<SkTextBlob> make_blob(const SkString& text, const SkFont& font) {
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size_t len = text.size();
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SkAutoTArray<SkScalar> pos(len);
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SkAutoTArray<SkGlyphID> glyphs(len);
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font.textToGlyphs(text.c_str(), len, SkTextEncoding::kUTF8, glyphs.get(), len);
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font.getXPos(glyphs.get(), len, pos.get());
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return SkTextBlob::MakeFromPosTextH(text.c_str(), len, pos.get(), 0, font);
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}
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class FontRegenGM : public skiagm::GM {
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public:
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FontRegenGM() {
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this->setBGColor(SK_ColorLTGRAY);
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}
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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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SkString name("fontregen");
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return name;
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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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auto tf = sk_tool_utils::create_portable_typeface("sans-serif", SkFontStyle::Normal());
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static const SkString kTexts[] = {
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SkString("abcdefghijklmnopqrstuvwxyz"),
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SkString("ABCDEFGHI"),
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SkString("NOPQRSTUV")
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};
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SkFont font;
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font.setEdging(SkFont::Edging::kAntiAlias);
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font.setSubpixel(false);
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font.setSize(80);
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font.setTypeface(tf);
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fBlobs[0] = make_blob(kTexts[0], font);
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font.setSize(162);
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fBlobs[1] = make_blob(kTexts[1], font);
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fBlobs[2] = make_blob(kTexts[2], font);
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}
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void onDraw(SkCanvas* canvas) override {
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GrRenderTargetContext* renderTargetContext =
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canvas->internal_private_accessTopLayerRenderTargetContext();
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if (!renderTargetContext) {
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skiagm::GM::DrawGpuOnlyMessage(canvas);
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return;
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}
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SkPaint paint;
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paint.setColor(SK_ColorBLACK);
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canvas->drawTextBlob(fBlobs[0], 10, 80, paint);
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canvas->drawTextBlob(fBlobs[1], 10, 225, paint);
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canvas->flush();
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paint.setColor(0xFF010101);
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canvas->drawTextBlob(fBlobs[0], 10, 305, paint);
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canvas->drawTextBlob(fBlobs[2], 10, 465, paint);
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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->contextPriv().getFontAtlasImage_ForTesting(kA8_GrMaskFormat);
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canvas->drawImage(img, 200, 0);
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}
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}
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}
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private:
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static constexpr SkScalar kSize = 512;
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sk_sp<SkTextBlob> fBlobs[3];
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typedef GM INHERITED;
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};
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constexpr SkScalar FontRegenGM::kSize;
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new FontRegenGM())
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