83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
|
/*
|
||
|
|
* Copyright 2013 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 "SkCanvas.h"
|
||
|
|
#include "SkGradientShader.h"
|
||
|
|
|
||
|
|
class AlphaGradientsGM : public skiagm::GM {
|
||
|
|
public:
|
||
|
|
AlphaGradientsGM() {}
|
||
|
|
|
||
|
|
protected:
|
||
|
|
virtual SkString onShortName() SK_OVERRIDE {
|
||
|
|
return SkString("alphagradients");
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual SkISize onISize() SK_OVERRIDE {
|
||
|
|
return SkISize::Make(640, 480);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void draw_grad(SkCanvas* canvas, const SkRect& r,
|
||
|
|
SkColor c0, SkColor c1, bool doPreMul) {
|
||
|
|
SkColor colors[] = { c0, c1 };
|
||
|
|
SkPoint pts[] = { { r.fLeft, r.fTop }, { r.fRight, r.fBottom } };
|
||
|
|
SkPaint paint;
|
||
|
|
uint32_t flags = doPreMul ? SkGradientShader::kInterpolateColorsInPremul_Flag : 0;
|
||
|
|
SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
|
||
|
|
SkShader::kClamp_TileMode,
|
||
|
|
NULL, flags);
|
||
|
|
paint.setShader(s)->unref();
|
||
|
|
canvas->drawRect(r, paint);
|
||
|
|
|
||
|
|
paint.setShader(NULL);
|
||
|
|
paint.setStyle(SkPaint::kStroke_Style);
|
||
|
|
canvas->drawRect(r, paint);
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
|
||
|
|
static const struct {
|
||
|
|
SkColor fColor0;
|
||
|
|
SkColor fColor1;
|
||
|
|
} gRec[] = {
|
||
|
|
{ 0xFFFFFFFF, 0x00000000 },
|
||
|
|
{ 0xFFFFFFFF, 0x00FF0000 },
|
||
|
|
{ 0xFFFFFFFF, 0x00FFFF00 },
|
||
|
|
{ 0xFFFFFFFF, 0x00FFFFFF },
|
||
|
|
{ 0xFFFF0000, 0x00000000 },
|
||
|
|
{ 0xFFFF0000, 0x00FF0000 },
|
||
|
|
{ 0xFFFF0000, 0x00FFFF00 },
|
||
|
|
{ 0xFFFF0000, 0x00FFFFFF },
|
||
|
|
{ 0xFF0000FF, 0x00000000 },
|
||
|
|
{ 0xFF0000FF, 0x00FF0000 },
|
||
|
|
{ 0xFF0000FF, 0x00FFFF00 },
|
||
|
|
{ 0xFF0000FF, 0x00FFFFFF },
|
||
|
|
};
|
||
|
|
|
||
|
|
SkRect r = SkRect::MakeWH(300, 30);
|
||
|
|
|
||
|
|
canvas->translate(10, 10);
|
||
|
|
|
||
|
|
for (int doPreMul = 0; doPreMul <= 1; ++doPreMul) {
|
||
|
|
canvas->save();
|
||
|
|
for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
|
||
|
|
draw_grad(canvas, r, gRec[i].fColor0, gRec[i].fColor1, SkToBool(doPreMul));
|
||
|
|
canvas->translate(0, r.height() + 8);
|
||
|
|
}
|
||
|
|
canvas->restore();
|
||
|
|
canvas->translate(r.width() + 10, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual uint32_t onGetFlags() const { return kSkipPipe_Flag; }
|
||
|
|
|
||
|
|
private:
|
||
|
|
typedef skiagm::GM INHERITED;
|
||
|
|
};
|
||
|
|
|
||
|
|
DEF_GM( return SkNEW(AlphaGradientsGM); )
|