skia2/gm/extractbitmap.cpp
Ben Wagner 7fde8e1728 IWYU for gms.
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

88 lines
2.7 KiB
C++

/*
* 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/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.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:
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;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new ExtractBitmapGM; )
}