aosp12/external/skia/docs/examples/Pixmap_isOpaque.cpp

23 lines
980 B
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 "tools/fiddle/examples.h"
// HASH=efd083f121e888a523455ea8a49e50d1
REG_FIDDLE(Pixmap_isOpaque, 256, 256, true, 0) {
void draw(SkCanvas* canvas) {
std::vector<uint32_t> pixels;
const int height = 2;
const int width = 2;
pixels.resize(height * width * 4);
SkPixmap pixmap(SkImageInfo::Make(width, height, kN32_SkColorType,
kPremul_SkAlphaType), (const void*) &pixels.front(), width * 4);
for (int index = 0; index < 2; ++index) {
pixmap.erase(0x00000000);
SkDebugf("isOpaque: %s\n", pixmap.isOpaque() ? "true" : "false");
pixmap.erase(0xFFFFFFFF);
SkDebugf("isOpaque: %s\n", pixmap.isOpaque() ? "true" : "false");
pixmap.reset(pixmap.info().makeAlphaType(kOpaque_SkAlphaType),
(const void*) &pixels.front(), width * 4);
}
}
} // END FIDDLE