Canvas_MakeRasterDirectN32.cpp File Reference

#include "tools/fiddle/examples.h"

Go to the source code of this file.

Functions
	REG_FIDDLE (Canvas_MakeRasterDirectN32, 256, 256, true, 0)

Function Documentation

REG_FIDDLE()

REG_FIDDLE	(	Canvas_MakeRasterDirectN32	,
		256	,
		256	,
		true	,
		0
	)

Definition at line 5 of file Canvas_MakeRasterDirectN32.cpp.

                                                          {
void draw(SkCanvas* ) {
    const int width = 3;
    const int height = 3;
    SkPMColor pixels[height][width];  // allocate a 3 by 3 Premultiplied bitmap on the stack
    // create a SkCanvas backed by a raster device, and delete it when the
    // function goes out of scope.
    std::unique_ptr<SkCanvas> canvas = SkCanvas::MakeRasterDirectN32(
            width,
            height,
            pixels[0],  // top-left of the bitmap
            sizeof(pixels[0]));  // byte width of the each row
    // write a Premultiplied value for white into all pixels in the bitmap
    canvas->clear(SK_ColorWHITE);
    SkPMColor pmWhite = pixels[0][0];  // the Premultiplied format may vary
    SkPaint paint;  // by default, draws black
    canvas->drawPoint(1, 1, paint);  // draw in the center
    for (int y = 0; y < height; ++y) {
        for (int x = 0; x < width; ++x) {
            SkDebugf("%c", pixels[y][x] == pmWhite ? '-' : 'x');
        }
        SkDebugf("\n");
    }
}
}  // END FIDDLE