skia2/docs/examples/ImageInfo_009.cpp
Hal Canary 8751512aaa Revert "Revert "Compile all fiddle examples locally""
This reverts commit 37575bf3ca.

Change-Id: Ia31abbd4906ddeed406f3da1128bc4d4177abf24
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201603
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
2019-03-16 00:48:09 +00:00

34 lines
1.6 KiB
C++

// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "fiddle/examples.h"
// HASH=1282dc1127ce1b0061544619ae4de0f0
REG_FIDDLE(ImageInfo_009, 256, 96, false, 0) {
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->drawBitmap(bitmap, 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->drawBitmap(bitmap, 2, 2);
}
SkPixmap bluePixmap(imageInfo, &blueBits, imageInfo.minRowBytes());
if (bitmap.installPixels(imageInfo, (void*) blueBits, imageInfo.minRowBytes())) {
canvas->drawBitmap(bitmap, 4, 4);
}
}
} // END FIDDLE