copy_to_4444.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPixmap.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "tools/DecodeUtils.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"

Go to the source code of this file.

Functions
	DEF_SIMPLE_GM (format4444, canvas, 64, 64)

Function Documentation

DEF_SIMPLE_GM()

DEF_SIMPLE_GM	(	format4444	,
		canvas	,
		64	,
		64
	)

Definition at line 51 of file copy_to_4444.cpp.

                                          {
    canvas->scale(16, 16);
    SkBitmap bitmap;
    SkImageInfo imageInfo = SkImageInfo::Make(1, 1, kARGB_4444_SkColorType, kPremul_SkAlphaType);
    bitmap.allocPixels(imageInfo);
    SkCanvas offscreen(bitmap);
    offscreen.clear(SK_ColorRED);
    canvas->drawImage(bitmap.asImage(), 0, 0);
    offscreen.clear(SK_ColorBLUE);
    canvas->drawImage(bitmap.asImage(), 1, 1);
    auto pack4444 = [](unsigned a, unsigned r, unsigned g, unsigned b) -> uint16_t {
        return (a << 0) | (b << 4) | (g << 8) | (r << 12);
    };
    uint16_t red4444 = pack4444(0xF, 0xF, 0x0, 0x0);
    uint16_t blue4444 = pack4444(0xF, 0x0, 0x0, 0x0F);
    SkPixmap redPixmap(imageInfo, &red4444, 2);
    if (bitmap.writePixels(redPixmap, 0, 0)) {
        canvas->drawImage(bitmap.asImage(), 2, 2);
    }
    SkPixmap bluePixmap(imageInfo, &blue4444, 2);
    if (bitmap.writePixels(bluePixmap, 0, 0)) {
        canvas->drawImage(bitmap.asImage(), 3, 3);
    }
}