1 // Copyright 2020 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4 REG_FIDDLE_SRGB(gpu4444diff, 260, 260, false, 3, 0, false) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 canvas->scale(16, 16);
7 SkBitmap bitmap;
8 SkImageInfo imageInfo = SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kPremul_SkAlphaType);
9 bitmap.allocPixels(imageInfo);
10 SkCanvas offscreen(bitmap);
11 offscreen.clear(SK_ColorGREEN);
12 canvas->drawBitmap(bitmap, 0, 0);
13 offscreen.clear(SK_ColorGRAY);
14 canvas->drawBitmap(bitmap, 2, 2);
15 auto pack4444 = [](unsigned a, unsigned r, unsigned g, unsigned b) -> uint16_t {
16 return (a << 0) | (b << 4) | (g << 8) | (r << 12);
17 };
18 uint16_t red4444[] = { pack4444(0xF, 0xF, 0x0, 0x0), pack4444(0xF, 0xb, 0x0, 0x0),
19 pack4444(0xF, 0x9, 0x0, 0x0), pack4444(0xF, 0x5, 0x0, 0x0) };
20 uint16_t blue4444[] = { pack4444(0xF, 0x0, 0x0, 0x0F), pack4444(0xF, 0x0, 0x0, 0x0b),
21 pack4444(0xF, 0x0, 0x0, 0x09), pack4444(0xF, 0x0, 0x0, 0x05) };
22 SkImageInfo pixInfo = SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kPremul_SkAlphaType);
23 SkPixmap redPixmap(imageInfo, &red4444, 4);
24 if (bitmap.writePixels(redPixmap, 0, 0)) {
25 canvas->drawBitmap(bitmap, 4, 4);
26 }
27 SkPixmap bluePixmap(imageInfo, &blue4444, 4);
28 if (bitmap.writePixels(bluePixmap, 0, 0)) {
29 canvas->drawBitmap(bitmap, 6, 6);
30 }
31 }
32 } // END FIDDLE
33