blob: 38f39caeb46add680021183b663a7b1da0a08995 [file] [log] [blame]
* Copyright 2015 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.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 "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
#include <string.h>
namespace skiagm {
class TextBlobColorTrans : public GM {
// This gm tests that textblobs can be translated and have their colors regenerated
// correctly. With smaller atlas sizes, it can also trigger regeneration of texture coords on
// the GPU backend
TextBlobColorTrans() { }
void onOnceBeforeDraw() override {
SkTextBlobBuilder builder;
// make textblob
// Large text is used to trigger atlas eviction
SkFont font(ToolUtils::DefaultPortableTypeface(), 256);
const char* text = "AB";
SkRect bounds;
font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
SkScalar yOffset = bounds.height();
ToolUtils::add_to_text_blob(&builder, text, font, 0, yOffset - 30);
// A8
text = "The quick brown fox jumps over the lazy dog.";
font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
ToolUtils::add_to_text_blob(&builder, text, font, 0, yOffset - 8);
// build
fBlob = builder.make();
SkString getName() const override { return SkString("textblobcolortrans"); }
SkISize getISize() override { return SkISize::Make(kWidth, kHeight); }
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
canvas->translate(10, 40);
SkRect bounds = fBlob->bounds();
// Colors were chosen to map to pairs of canonical colors. The GPU Backend will cache A8
// Texture Blobs based on the canonical color they map to. Canonical colors are used to
// create masks. For A8 there are 8 of them.
SkColor colors[] = {SK_ColorCYAN, SK_ColorLTGRAY, SK_ColorYELLOW, SK_ColorWHITE};
size_t count = std::size(colors);
size_t colorIndex = 0;
for (int y = 0; y + SkScalarFloorToInt(bounds.height()) < kHeight;
y += SkScalarFloorToInt(bounds.height())) {
paint.setColor(colors[colorIndex++ % count]);
canvas->translate(0, SkIntToScalar(y));
canvas->drawTextBlob(fBlob, 0, 0, paint);
sk_sp<SkTextBlob> fBlob;
inline static constexpr int kWidth = 675;
inline static constexpr int kHeight = 1600;
DEF_GM(return new TextBlobColorTrans;)
} // namespace skiagm