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These globals are now defined:
double duration; // The requested duration of the animation. double frame; // A value in [0, 1] of where we are in the animation.
This global is now defined:
GrBackendRenderTarget backEndRenderTarget;
GrBackendTexture backEndTextureRenderTarget;
Optional source image
These globals are now defined:
SkBitmap source; sk_sp<SkImage> image; GrBackendTexture backEndTexture; // GPU Only.
Note:
Adding comments with SK_FOLD_START and SK_FOLD_END creates foldable code
blocks.
These blocks will be folded by default and are useful for highlighting specific lines of code.
You can also use the keyboard shortcuts Ctrl+S and Ctrl+E in the code editor to set them.
These blocks will be folded by default and are useful for highlighting specific lines of code.
You can also use the keyboard shortcuts Ctrl+S and Ctrl+E in the code editor to set them.
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static SkBitmap make_alpha_image(int w, int h) {
SkBitmap bm;
bm.allocPixels(SkImageInfo::MakeA8(w, h));
bm.eraseARGB(10, 0, 0, 0);
for (int y = 0; y < bm.height(); ++y) {
for (int x = y; x < bm.width(); ++x) {
*bm.getAddr8(x, y) = 0xFF;
}
}
bm.setImmutable();
return bm;
}
static sk_sp<SkColorFilter> make_color_filter() {
SkScalar colorMatrix[20] = {
1, 0, 0, 0, 0,
0, 1, 0, 0, 0,
0, 0, 0.5, 0.5, 0,
0, 0, 0.5, 0.5, 0}; // mix G and A.
return SkColorFilters::Matrix(colorMatrix);
}
void draw(SkCanvas* canvas) {
auto image = make_alpha_image(96, 96).asImage();
SkSamplingOptions sampling;
SkPaint paint;
paint.setColorFilter(make_color_filter());
paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 10.0f, false));
canvas->drawImage(image.get(), 16, 16, sampling, &paint);
paint.setColorFilter(nullptr);
paint.setShader(SkShaders::Color(SK_ColorCYAN));
canvas->drawImage(image.get(), 144, 16, sampling, &paint);
paint.setColorFilter(make_color_filter());
canvas->drawImage(image.get(), 16, 144, sampling, &paint);
paint.setMaskFilter(nullptr);
canvas->drawImage(image.get(), 144, 144, sampling, &paint);
}