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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 "SkDisplacementMapEffect.h"
#include "SkBitmapSource.h"
namespace skiagm {
class DisplacementMapGM : public GM {
public:
DisplacementMapGM() : fInitialized(false) {
this->setBGColor(0xFF000000);
}
protected:
virtual SkString onShortName() {
return SkString("displacement");
}
void make_bitmap() {
fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 80, 80);
fBitmap.allocPixels();
SkDevice device(fBitmap);
SkCanvas canvas(&device);
canvas.clear(0x00000000);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xFF884422);
paint.setTextSize(SkIntToScalar(96));
const char* str = "g";
canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(55), paint);
}
void make_checkerboard() {
fCheckerboard.setConfig(SkBitmap::kARGB_8888_Config, 80, 80);
fCheckerboard.allocPixels();
SkDevice device(fCheckerboard);
SkCanvas canvas(&device);
canvas.clear(0x00000000);
SkPaint darkPaint;
darkPaint.setColor(0xFF804020);
SkPaint lightPaint;
lightPaint.setColor(0xFF244484);
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(500, 200);
}
void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) {
canvas->save();
canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
canvas->drawBitmap(fBitmap, SkIntToScalar(x), SkIntToScalar(y), &paint);
canvas->restore();
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
make_bitmap();
make_checkerboard();
fInitialized = true;
}
canvas->clear(0x00000000);
SkPaint paint;
SkAutoTUnref<SkImageFilter> displ(SkNEW_ARGS(SkBitmapSource, (fCheckerboard)));
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kG_ChannelSelectorType, 0.0f, displ)))->unref();
drawClippedBitmap(canvas, 0, 0, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kB_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 0.2f, displ)))->unref();
drawClippedBitmap(canvas, 100, 0, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kB_ChannelSelectorType, 0.4f, displ)))->unref();
drawClippedBitmap(canvas, 200, 0, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 0.6f, displ)))->unref();
drawClippedBitmap(canvas, 300, 0, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 0.8f, displ)))->unref();
drawClippedBitmap(canvas, 400, 0, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kG_ChannelSelectorType, 0.5f, displ)))->unref();
drawClippedBitmap(canvas, 0, 100, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kB_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref();
drawClippedBitmap(canvas, 100, 100, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kB_ChannelSelectorType, 0.5f, displ)))->unref();
drawClippedBitmap(canvas, 200, 100, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref();
drawClippedBitmap(canvas, 300, 100, paint);
paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref();
drawClippedBitmap(canvas, 400, 100, paint);
}
private:
typedef GM INHERITED;
SkBitmap fBitmap, fCheckerboard;
bool fInitialized;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new DisplacementMapGM; }
static GMRegistry reg(MyFactory);
}
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