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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 "SkColorMatrixFilter.h"
#define WIDTH 500
#define HEIGHT 500
class SkOnce {
public:
SkOnce() : fOnce(false) {};
bool once() const {
if (fOnce) {
return false;
}
fOnce = true;
return true;
}
private:
mutable bool fOnce;
};
namespace skiagm {
class ColorMatrixGM : public GM {
SkOnce fOnce;
void init() {
if (fOnce.once()) {
fBitmap = createBitmap(64, 64);
}
}
public:
ColorMatrixGM() {
this->setBGColor(0xFF808080);
}
protected:
virtual SkString onShortName() {
return SkString("colormatrix");
}
virtual SkISize onISize() {
return make_isize(WIDTH, HEIGHT);
}
SkBitmap createBitmap(int width, int height) {
SkBitmap bm;
bm.setConfig(SkBitmap::kARGB_8888_Config, width, height);
bm.allocPixels();
SkCanvas canvas(bm);
canvas.clear(0x0);
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) {
SkPaint paint;
paint.setColor(SkColorSetARGB(255, x * 255 / width, y * 255 / height, 0));
canvas.drawRect(SkRect::MakeXYWH(x, y, 1, 1), paint);
}
}
return bm;
}
virtual void onDraw(SkCanvas* canvas) {
this->init();
SkPaint paint;
SkColorMatrix matrix;
SkColorMatrixFilter* filter = new SkColorMatrixFilter();
paint.setColorFilter(filter)->unref();
matrix.setIdentity();
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 0, 0, &paint);
matrix.setRotate(SkColorMatrix::kR_Axis, 90);
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 80, 0, &paint);
matrix.setRotate(SkColorMatrix::kG_Axis, 90);
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 160, 0, &paint);
matrix.setRotate(SkColorMatrix::kB_Axis, 90);
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 240, 0, &paint);
matrix.setSaturation(SkFloatToScalar(0.0f));
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 0, 80, &paint);
matrix.setSaturation(SkFloatToScalar(0.5f));
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 80, 80, &paint);
matrix.setSaturation(SkFloatToScalar(1.0f));
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 160, 80, &paint);
matrix.setSaturation(SkFloatToScalar(2.0f));
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 240, 80, &paint);
matrix.setRGB2YUV();
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 0, 160, &paint);
matrix.setYUV2RGB();
filter->setMatrix(matrix);
canvas->drawBitmap(fBitmap, 80, 160, &paint);
SkScalar s1 = SK_Scalar1;
SkScalar s255 = SkIntToScalar(255);
// Move red into alpha, set color to white
SkScalar data[20] = {
0, 0, 0, 0, s255,
0, 0, 0, 0, s255,
0, 0, 0, 0, s255,
s1, 0, 0, 0, 0,
};
filter->setArray(data);
canvas->drawBitmap(fBitmap, 160, 160, &paint);
}
private:
SkBitmap fBitmap;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ColorMatrixGM; }
static GMRegistry reg(MyFactory);
}
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