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/*
* Copyright 2011 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 "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkString.h"
#include "SkSurface.h"
namespace skiagm {
static void create_bitmap(SkBitmap* bitmap) {
const int W = 100;
const int H = 100;
bitmap->allocN32Pixels(W, H);
SkCanvas canvas(*bitmap);
canvas.drawColor(SK_ColorRED);
SkPaint paint;
paint.setColor(SK_ColorBLUE);
canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
}
class ExtractBitmapGM : public GM {
public:
ExtractBitmapGM() {}
protected:
// overrides from SkEventSink
SkString onShortName() override {
return SkString("extractbitmap");
}
SkISize onISize() override {
return SkISize::Make(600, 600);
}
void onDraw(SkCanvas* canvas) override {
SkBitmap bitmap;
create_bitmap(&bitmap);
int x = bitmap.width() / 2;
int y = bitmap.height() / 2;
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
canvas->drawBitmap(bitmap, 0, 0);
{
// Do some subset drawing. This will test that an SkGPipe properly
// handles the case where bitmaps share a pixelref
// Draw the bottom right fourth of the bitmap over the top left
SkBitmap subset;
bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
canvas->drawBitmap(subset, 0, 0);
// Draw the top left corner over the bottom right
bitmap.extractSubset(&subset, SkIRect::MakeWH(x, y));
canvas->drawBitmap(subset, SkIntToScalar(x), SkIntToScalar(y));
// Draw a subset which has the same height and pixelref offset but a
// different width
bitmap.extractSubset(&subset, SkIRect::MakeWH(x, bitmap.height()));
SkAutoCanvasRestore autoRestore(canvas, true);
canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
canvas->drawBitmap(subset, 0, 0);
// Now draw a subet which has the same width and pixelref offset but
// a different height
bitmap.extractSubset(&subset, SkIRect::MakeWH(bitmap.height(), y));
canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
canvas->drawBitmap(subset, 0, 0);
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ExtractBitmapGM; }
static GMRegistry reg(MyFactory);
}
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