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/*
* Copyright 2013 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"
#include "SkColorFilterImageFilter.h"
#include "SkTileImageFilter.h"
#include "SkBitmapSource.h"
#define WIDTH 400
#define HEIGHT 100
#define MARGIN 12
namespace skiagm {
class TileImageFilterGM : public GM {
public:
TileImageFilterGM() : fInitialized(false) {
this->setBGColor(0xFF000000);
}
protected:
virtual SkString onShortName() {
return SkString("tileimagefilter");
}
void make_bitmap() {
fBitmap.allocN32Pixels(50, 50);
SkCanvas canvas(fBitmap);
canvas.clear(0xFF000000);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xD000D000);
paint.setTextSize(SkIntToScalar(50));
const char* str = "e";
canvas.drawText(str, strlen(str), SkIntToScalar(10), SkIntToScalar(45), paint);
}
void make_checkerboard() {
fCheckerboard.allocN32Pixels(80, 80);
SkCanvas canvas(fCheckerboard);
canvas.clear(0x00000000);
SkPaint darkPaint;
darkPaint.setColor(0xFF404040);
SkPaint lightPaint;
lightPaint.setColor(0xFFA0A0A0);
for (int y = 0; y < 80; y += 16) {
for (int x = 0; x < 80; x += 16) {
canvas.save();
canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
canvas.restore();
}
}
}
virtual SkISize onISize() {
return make_isize(WIDTH, HEIGHT);
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
make_bitmap();
make_checkerboard();
fInitialized = true;
}
canvas->clear(0x00000000);
int x = 0, y = 0;
for (size_t i = 0; i < 4; i++) {
SkBitmap* bitmap = (i & 0x01) ? &fCheckerboard : &fBitmap;
SkRect srcRect = SkRect::MakeXYWH(SkIntToScalar(bitmap->width()/4),
SkIntToScalar(bitmap->height()/4),
SkIntToScalar(bitmap->width()/(i+1)),
SkIntToScalar(bitmap->height()/(i+1)));
SkRect dstRect = SkRect::MakeXYWH(SkIntToScalar(i * 8),
SkIntToScalar(i * 4),
SkIntToScalar(bitmap->width() - i * 12),
SkIntToScalar(bitmap->height()) - i * 12);
SkAutoTUnref<SkImageFilter> tileInput(SkBitmapSource::Create(*bitmap));
SkAutoTUnref<SkImageFilter> filter(
SkTileImageFilter::Create(srcRect, dstRect, tileInput));
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
SkPaint paint;
paint.setImageFilter(filter);
canvas->drawBitmap(fBitmap, 0, 0, &paint);
canvas->restore();
x += bitmap->width() + MARGIN;
if (x + bitmap->width() > WIDTH) {
x = 0;
y += bitmap->height() + MARGIN;
}
}
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, SK_Scalar1, 0 };
SkRect srcRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width()),
SkIntToScalar(fBitmap.height()));
SkRect dstRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() * 2),
SkIntToScalar(fBitmap.height() * 2));
SkAutoTUnref<SkImageFilter> tile(SkTileImageFilter::Create(srcRect, dstRect, NULL));
SkAutoTUnref<SkColorFilter> cf(SkColorMatrixFilter::Create(matrix));
SkAutoTUnref<SkImageFilter> cfif(SkColorFilterImageFilter::Create(cf, tile.get()));
SkPaint paint;
paint.setImageFilter(cfif);
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(dstRect);
canvas->saveLayer(&dstRect, &paint);
canvas->drawBitmap(fBitmap, 0, 0);
canvas->restore();
canvas->restore();
}
private:
typedef GM INHERITED;
SkBitmap fBitmap, fCheckerboard;
bool fInitialized;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new TileImageFilterGM; }
static GMRegistry reg(MyFactory);
}
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