void onOnceBeforeDraw() override {
fBG.installPixels(SkImageInfo::Make(2, 2, kARGB_4444_SkColorType,
kOpaque_SkAlphaType),
gData, 4);
make_bitmaps(W, H, &fSrcB, &fDstB, &fTransparent);
}
XfermodesGM() {
// Do all this work in a temporary so we get a deep copy,
// especially of gBG.
SkBitmap scratchBitmap;
scratchBitmap.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4);
scratchBitmap.setPixels(gBG);
scratchBitmap.setIsOpaque(true);
scratchBitmap.copyTo(&fBG, SkBitmap::kARGB_4444_Config);
make_bitmaps(W, H, &fSrcB, &fDstB);
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
make_bitmaps();
fInitialized = true;
}
canvas->clear(0x00000000);
SkPaint paint;
SkAutoTUnref<SkImageFilter> displ(SkBitmapSource::Create(fCheckerboard));
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kG_ChannelSelectorType, 0.0f, displ))->unref();
drawClippedBitmap(canvas, 0, 0, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kB_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 16.0f, displ))->unref();
drawClippedBitmap(canvas, 100, 0, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kB_ChannelSelectorType, 32.0f, displ))->unref();
drawClippedBitmap(canvas, 200, 0, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 48.0f, displ))->unref();
drawClippedBitmap(canvas, 300, 0, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 64.0f, displ))->unref();
drawClippedBitmap(canvas, 400, 0, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kG_ChannelSelectorType, 40.0f, displ))->unref();
drawClippedBitmap(canvas, 0, 100, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kB_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 40.0f, displ))->unref();
drawClippedBitmap(canvas, 100, 100, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kB_ChannelSelectorType, 40.0f, displ))->unref();
drawClippedBitmap(canvas, 200, 100, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 40.0f, displ))->unref();
drawClippedBitmap(canvas, 300, 100, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType, 40.0f, displ))->unref();
drawClippedBitmap(canvas, 400, 100, paint);
SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(30, 30, 40, 40));
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kG_ChannelSelectorType,
0.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 0, 200, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kB_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
16.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 100, 200, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kB_ChannelSelectorType,
32.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 200, 200, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
48.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 300, 200, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
64.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 400, 200, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kG_ChannelSelectorType,
40.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 0, 300, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kB_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
40.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 100, 300, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kB_ChannelSelectorType,
40.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 200, 300, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
40.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 300, 300, paint);
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
40.0f, displ, NULL, &cropRect))->unref();
drawClippedBitmap(canvas, 400, 300, paint);
// Tests for images of different sizes
displ.reset(SkBitmapSource::Create(fSmall));
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kG_ChannelSelectorType,
40.0f, displ))->unref();
drawClippedBitmap(canvas, 0, 400, paint);
displ.reset(SkBitmapSource::Create(fLarge));
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kB_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
40.0f, displ))->unref();
drawClippedBitmap(canvas, 100, 400, paint);
displ.reset(SkBitmapSource::Create(fLargeW));
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kB_ChannelSelectorType,
40.0f, displ))->unref();
drawClippedBitmap(canvas, 200, 400, paint);
displ.reset(SkBitmapSource::Create(fLargeH));
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
40.0f, displ))->unref();
drawClippedBitmap(canvas, 300, 400, paint);
// Test for no given displacement input. In this case, both displacement
// and color should use the same bitmap, given to SkCanvas::drawBitmap()
// as an input argument.
paint.setImageFilter(SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kG_ChannelSelectorType,
SkDisplacementMapEffect::kA_ChannelSelectorType,
40.0f, NULL))->unref();
drawClippedBitmap(canvas, 400, 400, paint);
}
