83c2f70b51
Motivation: it would be a good idea if the API documentation examples
were checked into the skia repository, so we could make sure they
compile as part of the commit queue.
Fiddle would make/update a named fiddle each time it gets a new
commit of Skia, extracted from the code in the examples/ directory.
The docs would point at those named fiddles. Named fiddles have urls
in the form:
https://fiddle.skia.org/c/@Bitmap_000
Then we would stick a link to the example into the header documentation
like this:
/** Allocates the pixel memory for the bitmap, given its dimensions
and SkColorType. Returns true on success, where success means
either setPixels() or setPixelRef() was called.
@param bitmap SkBitmap containing SkImageInfo as input, and
SkPixelRef as output
@return true if SkPixelRef was allocated
@example https://fiddle.skia.org/c/@Bitmap_000
*/
bool allocPixelRef(SkBitmap* bitmap) override;
There are still around 200 disabled examples that need to be fixed
(these result from API changes since the author left).
Change-Id: I14a31348a9ccaaa31f65424b91e3a3533d2583a7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/198824
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
34 lines
1.6 KiB
C++
34 lines
1.6 KiB
C++
// Copyright 2019 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#include "fiddle/examples.h"
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// HASH=1282dc1127ce1b0061544619ae4de0f0
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REG_FIDDLE(ImageInfo_009, 256, 96, false, 0) {
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void draw(SkCanvas* canvas) {
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canvas->scale(16, 16);
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SkBitmap bitmap;
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SkImageInfo imageInfo = SkImageInfo::Make(2, 2, kRGBA_1010102_SkColorType, kOpaque_SkAlphaType);
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bitmap.allocPixels(imageInfo);
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SkCanvas offscreen(bitmap);
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offscreen.clear(SK_ColorGREEN);
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canvas->drawBitmap(bitmap, 0, 0);
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auto pack1010102 = [](unsigned r, unsigned g, unsigned b, unsigned a) -> uint32_t {
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return (r << 0) | (g << 10) | (b << 20) | (a << 30);
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};
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uint32_t redBits[] = { pack1010102(0x3FF, 0x000, 0x000, 0x3),
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pack1010102(0x2ff, 0x000, 0x000, 0x3),
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pack1010102(0x1ff, 0x000, 0x000, 0x3),
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pack1010102(0x0ff, 0x000, 0x000, 0x3) };
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uint32_t blueBits[] = { pack1010102(0x000, 0x000, 0x3FF, 0x3),
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pack1010102(0x000, 0x000, 0x2ff, 0x3),
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pack1010102(0x000, 0x000, 0x1ff, 0x3),
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pack1010102(0x000, 0x000, 0x0ff, 0x3) };
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if (bitmap.installPixels(imageInfo, (void*) redBits, imageInfo.minRowBytes())) {
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canvas->drawBitmap(bitmap, 2, 2);
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}
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SkPixmap bluePixmap(imageInfo, &blueBits, imageInfo.minRowBytes());
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if (bitmap.installPixels(imageInfo, (void*) blueBits, imageInfo.minRowBytes())) {
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canvas->drawBitmap(bitmap, 4, 4);
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}
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}
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} // END FIDDLE
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