skia2/gm/bitmapimage.cpp

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/*
* Copyright 2016 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"
namespace skiagm {
class BitmapImageGM : public GM {
public:
BitmapImageGM() {}
protected:
SkString onShortName() override {
return SkString("bitmap-image-srgb-linear");
}
SkISize onISize() override {
return SkISize::Make(2*kSize, 2*kSize);
}
void onDraw(SkCanvas* canvas) override {
// Create image.
sk_sp<SkImage> image = GetResourceAsImage("mandrill_512_q075.jpg");
if (!image) {
SkDebugf("Failure: Is the resource path set properly?");
return;
}
// Create matching bitmap.
SkBitmap bitmap;
SkAssertResult(image->asLegacyBitmap(&bitmap, SkImage::kRO_LegacyBitmapMode));
// The GM will be displayed in a 2x2 grid.
// The top two squares show an sRGB image, then bitmap, drawn to a linear canvas.
SkImageInfo linearInfo = SkImageInfo::MakeN32(2*kSize, kSize, kOpaque_SkAlphaType);
SkBitmap linearBMCanvas;
linearBMCanvas.allocPixels(linearInfo);
SkCanvas linearCanvas(linearBMCanvas);
linearCanvas.drawImage(image, 0.0f, 0.0f, nullptr);
linearCanvas.translate(SkScalar(kSize), 0.0f);
linearCanvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
canvas->drawBitmap(linearBMCanvas, 0.0f, 0.0f, nullptr);
canvas->translate(0.0f, SkScalar(kSize));
// The bottom two squares show an sRGB image, then bitmap, drawn to a srgb canvas.
SkImageInfo srgbInfo = SkImageInfo::MakeS32(2*kSize, kSize, kOpaque_SkAlphaType);
SkBitmap srgbBMCanvas;
srgbBMCanvas.allocPixels(srgbInfo);
SkCanvas srgbCanvas(srgbBMCanvas);
srgbCanvas.drawImage(image, 0.0f, 0.0f, nullptr);
srgbCanvas.translate(SkScalar(kSize), 0.0f);
srgbCanvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
canvas->drawBitmap(srgbBMCanvas, 0.0f, 0.0f, nullptr);
}
private:
static constexpr int kSize = 512;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new BitmapImageGM; }
static GMRegistry reg(MyFactory);
}