Color_Type_RGBA_1010102.cpp File Reference

#include "tools/fiddle/examples.h"

Go to the source code of this file.

Functions
	REG_FIDDLE (Color_Type_RGBA_1010102, 256, 96, false, 0)

Function Documentation

REG_FIDDLE()

REG_FIDDLE	(	Color_Type_RGBA_1010102	,
		256	,
		96	,
		false	,
		0
	)

Definition at line 5 of file Color_Type_RGBA_1010102.cpp.

                                                       {
void draw(SkCanvas* canvas) {
    canvas->scale(16, 16);
    SkBitmap bitmap;
    SkImageInfo imageInfo = SkImageInfo::Make(2, 2, kRGBA_1010102_SkColorType, kOpaque_SkAlphaType);
    bitmap.allocPixels(imageInfo);
    SkCanvas offscreen(bitmap);
    offscreen.clear(SK_ColorGREEN);
    canvas->drawImage(bitmap.asImage(), 0, 0);
    auto pack1010102 = [](unsigned r, unsigned g, unsigned b, unsigned a) -> uint32_t {
        return (r << 0) | (g << 10) | (b << 20) | (a << 30);
    };
    uint32_t redBits[] =  { pack1010102(0x3FF, 0x000, 0x000, 0x3),
                            pack1010102(0x2ff, 0x000, 0x000, 0x3),
                            pack1010102(0x1ff, 0x000, 0x000, 0x3),
                            pack1010102(0x0ff, 0x000, 0x000, 0x3) };
    uint32_t blueBits[] = { pack1010102(0x000, 0x000, 0x3FF, 0x3),
                            pack1010102(0x000, 0x000, 0x2ff, 0x3),
                            pack1010102(0x000, 0x000, 0x1ff, 0x3),
                            pack1010102(0x000, 0x000, 0x0ff, 0x3) };
    if (bitmap.installPixels(imageInfo, (void*) redBits, imageInfo.minRowBytes())) {
        canvas->drawImage(bitmap.asImage(), 2, 2);
    }
    SkPixmap bluePixmap(imageInfo, &blueBits, imageInfo.minRowBytes());
    if (bitmap.installPixels(imageInfo, (void*) blueBits, imageInfo.minRowBytes())) {
        canvas->drawImage(bitmap.asImage(), 4, 4);
    }
}
}  // END FIDDLE