skia2/docs/examples/Pixmap_info.cpp
Mike Klein c0bd9f9fe5 rewrite includes to not need so much -Ifoo
Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2019-04-24 16:27:11 +00:00

24 lines
1.2 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 "tools/fiddle/examples.h"
// HASH=6e0f558bf7fabc655041116288559134
REG_FIDDLE(Pixmap_info, 256, 256, true, 3) {
void draw(SkCanvas* canvas) {
std::vector<int32_t> pixels;
pixels.resize(image->height() * image->width() * 4);
SkPixmap pixmap(SkImageInfo::Make(image->width(), image->height(), kN32_SkColorType,
image->alphaType()), (const void*) &pixels.front(), image->width() * 4);
image->readPixels(pixmap, 0, 0);
SkPixmap inset;
if (pixmap.extractSubset(&inset, {128, 128, 512, 512})) {
const SkImageInfo& info = inset.info();
const char* alphas[] = {"Unknown", "Opaque", "Premul", "Unpremul"};
const char* colors[] = {"Unknown", "Alpha_8", "RGB_565", "ARGB_4444", "RGBA_8888",
"RGB_888x", "BGRA_8888", "RGBA_1010102", "RGB_101010x", "Gray_8", "RGBA_F16Norm",
"RGBA_F16"};
SkDebugf("width: %d height: %d color: %s alpha: %s\n", info.width(), info.height(),
colors[info.colorType()], alphas[info.alphaType()]);
}
}
} // END FIDDLE