blob: 3addd80a52815574b47fff06cefa78239d5a4ced [file] [log] [blame]
/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// GM to stress TextBlob regeneration and the GPU font cache
// It's not necessary to run this with CPU configs
//
// The point here is to draw a set of text that will fit in one Plot, and then some large
// text. After a flush we draw the first set of text again with a slightly different color,
// and then enough new large text to spill the entire atlas. What *should* happen is that
// the Plot with the first set of text will not get overwritten by the new large text.
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontStyle.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/gpu/GrContext.h"
#include "include/gpu/GrContextOptions.h"
#include "include/private/GrTypesPriv.h"
#include "include/private/SkTemplates.h"
#include "src/gpu/GrContextPriv.h"
#include "tools/ToolUtils.h"
class GrRenderTargetContext;
static sk_sp<SkTextBlob> make_blob(const SkString& text, const SkFont& font) {
size_t len = text.size();
SkAutoTArray<SkScalar> pos(len);
SkAutoTArray<SkGlyphID> glyphs(len);
font.textToGlyphs(text.c_str(), len, SkTextEncoding::kUTF8, glyphs.get(), len);
font.getXPos(glyphs.get(), len, pos.get());
return SkTextBlob::MakeFromPosTextH(text.c_str(), len, pos.get(), 0, font);
}
class FontRegenGM : public skiagm::GpuGM {
void modifyGrContextOptions(GrContextOptions* options) override {
options->fGlyphCacheTextureMaximumBytes = 0;
options->fAllowMultipleGlyphCacheTextures = GrContextOptions::Enable::kNo;
}
SkString onShortName() override { return SkString("fontregen"); }
SkISize onISize() override { return {kSize, kSize}; }
void onOnceBeforeDraw() override {
this->setBGColor(SK_ColorLTGRAY);
auto tf = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle::Normal());
static const SkString kTexts[] = {
SkString("abcdefghijklmnopqrstuvwxyz"),
SkString("ABCDEFGHI"),
SkString("NOPQRSTUV")
};
SkFont font;
font.setEdging(SkFont::Edging::kAntiAlias);
font.setSubpixel(false);
font.setSize(80);
font.setTypeface(tf);
fBlobs[0] = make_blob(kTexts[0], font);
font.setSize(162);
fBlobs[1] = make_blob(kTexts[1], font);
fBlobs[2] = make_blob(kTexts[2], font);
}
void onDraw(GrContext* context, GrRenderTargetContext*, SkCanvas* canvas) override {
SkPaint paint;
paint.setColor(SK_ColorBLACK);
canvas->drawTextBlob(fBlobs[0], 10, 80, paint);
canvas->drawTextBlob(fBlobs[1], 10, 225, paint);
context->flush();
paint.setColor(0xFF010101);
canvas->drawTextBlob(fBlobs[0], 10, 305, paint);
canvas->drawTextBlob(fBlobs[2], 10, 465, paint);
// Debugging tool for GPU.
static const bool kShowAtlas = false;
if (kShowAtlas) {
auto img = context->priv().testingOnly_getFontAtlasImage(kA8_GrMaskFormat);
canvas->drawImage(img, 200, 0);
}
}
private:
static constexpr int kSize = 512;
sk_sp<SkTextBlob> fBlobs[3];
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new FontRegenGM())