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ImageInfo_computeOffset.cpp
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1// Copyright 2019 Google LLC.
2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
4REG_FIDDLE(ImageInfo_computeOffset, 256, 128, false, 0) {
5void draw(SkCanvas* canvas) {
6 uint8_t pixels[][12] = { { 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00},
7 { 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00},
8 { 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00},
9 { 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0xFF},
10 { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
11 { 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00},
12 { 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00},
13 { 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00} };
14 SkImageInfo imageInfo = SkImageInfo::MakeA8(8, 8);
16 bitmap.installPixels(imageInfo, (void*) pixels, sizeof(pixels[0]));
18 paint.setColor(SK_ColorRED);
19 canvas->drawImageRect(bitmap.asImage(), SkRect::MakeWH(8, 8), SkRect::MakeWH(32, 32),
21 size_t offset = imageInfo.computeOffset(2, 3, sizeof(pixels[0]));
22 pixels[0][offset] = 0x7F;
23 offset = imageInfo.computeOffset(5, 3, sizeof(pixels[0]));
24 pixels[0][offset] = 0x7F;
25 bitmap.installPixels(imageInfo, (void*) pixels, sizeof(pixels[0]));
26 canvas->drawImageRect(bitmap.asImage(), SkRect::MakeWH(8, 8), SkRect::MakeWH(128, 128),
28}
29} // END FIDDLE
REG_FIDDLE(ImageInfo_computeOffset, 256, 128, false, 0)
constexpr SkColor SK_ColorRED
Definition: SkColor.h:126
static void draw(SkCanvas *canvas, SkRect &target, int x, int y)
Definition: aaclip.cpp:27
@ kStrict_SrcRectConstraint
sample only inside bounds; slower
Definition: SkCanvas.h:1542
void drawImageRect(const SkImage *, const SkRect &src, const SkRect &dst, const SkSamplingOptions &, const SkPaint *, SrcRectConstraint)
Definition: SkCanvas.cpp:2333
const Paint & paint
Definition: color_source.cc:38
Definition: bitmap.py:1
SeparatedVector2 offset
size_t computeOffset(int x, int y, size_t rowBytes) const
Definition: SkImageInfo.cpp:98
static SkImageInfo MakeA8(int width, int height)
static constexpr SkRect MakeWH(float w, float h)
Definition: SkRect.h:609