102 lines
3.0 KiB
C++
102 lines
3.0 KiB
C++
/*
|
|
* 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.h"
|
|
|
|
#include "Resources.h"
|
|
#include "SkCanvas.h"
|
|
#include "SkGradientShader.h"
|
|
#include "SkStream.h"
|
|
#include "SkTextBlob.h"
|
|
#include "SkTypeface.h"
|
|
|
|
namespace skiagm {
|
|
class TextBlobColorTrans : public GM {
|
|
public:
|
|
// 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() { }
|
|
|
|
protected:
|
|
void onOnceBeforeDraw() override {
|
|
SkTextBlobBuilder builder;
|
|
|
|
// make textblob
|
|
// Large text is used to trigger atlas eviction
|
|
SkPaint paint;
|
|
paint.setTextSize(256);
|
|
const char* text = "AB";
|
|
sk_tool_utils::set_portable_typeface(&paint);
|
|
|
|
SkRect bounds;
|
|
paint.measureText(text, strlen(text), &bounds);
|
|
|
|
SkScalar yOffset = bounds.height();
|
|
sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 30);
|
|
|
|
// A8
|
|
paint.setTextSize(28);
|
|
text = "The quick brown fox jumps over the lazy dog.";
|
|
paint.setSubpixelText(false);
|
|
paint.setLCDRenderText(false);
|
|
paint.measureText(text, strlen(text), &bounds);
|
|
sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 8);
|
|
|
|
// build
|
|
fBlob.reset(builder.build());
|
|
}
|
|
|
|
SkString onShortName() override {
|
|
return SkString("textblobcolortrans");
|
|
}
|
|
|
|
SkISize onISize() override {
|
|
return SkISize::Make(kWidth, kHeight);
|
|
}
|
|
|
|
void onDraw(SkCanvas* canvas) override {
|
|
|
|
canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
|
|
|
|
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_tool_utils::color_to_565(SK_ColorLTGRAY),
|
|
SK_ColorYELLOW, SK_ColorWHITE};
|
|
|
|
size_t count = SK_ARRAY_COUNT(colors);
|
|
size_t colorIndex = 0;
|
|
for (int y = 0; y + SkScalarFloorToInt(bounds.height()) < kHeight;
|
|
y += SkScalarFloorToInt(bounds.height())) {
|
|
paint.setColor(colors[colorIndex++ % count]);
|
|
canvas->save();
|
|
canvas->translate(0, SkIntToScalar(y));
|
|
canvas->drawTextBlob(fBlob, 0, 0, paint);
|
|
canvas->restore();
|
|
}
|
|
}
|
|
|
|
private:
|
|
SkAutoTUnref<const SkTextBlob> fBlob;
|
|
|
|
static const int kWidth = 675;
|
|
static const int kHeight = 1600;
|
|
|
|
typedef GM INHERITED;
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
DEF_GM( return SkNEW(TextBlobColorTrans); )
|
|
}
|