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/*
* Copyright 2012 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 "SkColorMatrixFilter.h"
#include "SkColorPriv.h"
#include "SkShader.h"
#include "SkBlurImageFilter.h"
#include "SkColorFilterImageFilter.h"
#define FILTER_WIDTH SkIntToScalar(30)
#define FILTER_HEIGHT SkIntToScalar(30)
#define MARGIN SkIntToScalar(10)
static SkImageFilter* make_blur(float amount, SkImageFilter* input = NULL) {
return new SkBlurImageFilter(amount, amount, input);
}
static SkImageFilter* make_brightness(float amount, SkImageFilter* input = NULL) {
SkScalar amount255 = SkScalarMul(SkFloatToScalar(amount), SkIntToScalar(255));
SkScalar matrix[20] = { 1, 0, 0, 0, amount255,
0, 1, 0, 0, amount255,
0, 0, 1, 0, amount255,
0, 0, 0, 1, 0 };
SkAutoTUnref<SkColorFilter> filter(new SkColorMatrixFilter(matrix));
return new SkColorFilterImageFilter(filter, input);
}
static SkImageFilter* make_grayscale(SkImageFilter* input = NULL) {
SkScalar matrix[20];
memset(matrix, 0, 20 * sizeof(SkScalar));
matrix[0] = matrix[5] = matrix[10] = SkFloatToScalar(0.2126f);
matrix[1] = matrix[6] = matrix[11] = SkFloatToScalar(0.7152f);
matrix[2] = matrix[7] = matrix[12] = SkFloatToScalar(0.0722f);
matrix[18] = SkFloatToScalar(1.0f);
SkAutoTUnref<SkColorFilter> filter(new SkColorMatrixFilter(matrix));
return new SkColorFilterImageFilter(filter, input);
}
static SkImageFilter* make_mode_blue(SkImageFilter* input = NULL) {
SkAutoTUnref<SkColorFilter> filter(
SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode));
return new SkColorFilterImageFilter(filter, input);
}
class ColorFilterImageFilterGM : public skiagm::GM {
public:
ColorFilterImageFilterGM () {}
protected:
virtual SkString onShortName() {
return SkString("colorfilterimagefilter");
}
void drawClippedRect(SkCanvas* canvas, const SkRect& r, const SkPaint& paint, float outset = 0.0f) {
canvas->save();
SkRect clip(r);
clip.outset(SkFloatToScalar(outset), SkFloatToScalar(outset));
canvas->clipRect(clip);
canvas->drawRect(r, paint);
canvas->restore();
}
virtual SkISize onISize() { return SkISize::Make(400, 100); }
virtual void onDraw(SkCanvas* canvas) {
SkRect r = SkRect::MakeWH(FILTER_WIDTH, FILTER_HEIGHT);
SkPaint paint;
paint.setColor(SK_ColorRED);
canvas->save();
for (float brightness = -1.0f; brightness <= 1.0f; brightness += 0.2f) {
SkAutoTUnref<SkImageFilter> dim(make_brightness(-brightness));
SkAutoTUnref<SkImageFilter> bright(make_brightness(brightness, dim));
paint.setImageFilter(bright);
drawClippedRect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
canvas->restore();
canvas->translate(0, FILTER_HEIGHT + MARGIN);
{
SkAutoTUnref<SkImageFilter> brightness(make_brightness(0.9f));
SkAutoTUnref<SkImageFilter> grayscale(make_grayscale(brightness));
paint.setImageFilter(grayscale);
drawClippedRect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
SkAutoTUnref<SkImageFilter> grayscale(make_grayscale());
SkAutoTUnref<SkImageFilter> brightness(make_brightness(0.9f, grayscale));
paint.setImageFilter(brightness);
drawClippedRect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
SkAutoTUnref<SkImageFilter> blue(make_mode_blue());
SkAutoTUnref<SkImageFilter> brightness(make_brightness(1.0f, blue));
paint.setImageFilter(brightness);
drawClippedRect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
SkAutoTUnref<SkImageFilter> brightness(make_brightness(1.0f));
SkAutoTUnref<SkImageFilter> blue(make_mode_blue(brightness));
paint.setImageFilter(blue);
drawClippedRect(canvas, r, paint);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
{
SkAutoTUnref<SkImageFilter> blur(make_blur(3.0f));
SkAutoTUnref<SkImageFilter> brightness(make_brightness(0.5f, blur));
paint.setImageFilter(brightness);
drawClippedRect(canvas, r, paint, 3);
canvas->translate(FILTER_WIDTH + MARGIN, 0);
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static skiagm::GM* MyFactory(void*) { return new ColorFilterImageFilterGM; }
static skiagm::GMRegistry reg(MyFactory);
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