31 lines
1.7 KiB
C++
31 lines
1.7 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=818e4e1191e39d2a642902cbf253b399
|
|
REG_FIDDLE(ImageInfo_computeOffset, 256, 128, false, 0) {
|
|
void draw(SkCanvas* canvas) {
|
|
uint8_t pixels[][12] = { { 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00},
|
|
{ 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00},
|
|
{ 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00},
|
|
{ 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0xFF},
|
|
{ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
|
|
{ 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00},
|
|
{ 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00},
|
|
{ 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00} };
|
|
SkImageInfo imageInfo = SkImageInfo::MakeA8(8, 8);
|
|
SkBitmap bitmap;
|
|
bitmap.installPixels(imageInfo, (void*) pixels, sizeof(pixels[0]));
|
|
SkPaint paint;
|
|
paint.setColor(SK_ColorRED);
|
|
canvas->drawImageRect(bitmap.asImage(), SkRect::MakeWH(8, 8), SkRect::MakeWH(32, 32),
|
|
SkSamplingOptions(), &paint, SkCanvas::kStrict_SrcRectConstraint);
|
|
size_t offset = imageInfo.computeOffset(2, 3, sizeof(pixels[0]));
|
|
pixels[0][offset] = 0x7F;
|
|
offset = imageInfo.computeOffset(5, 3, sizeof(pixels[0]));
|
|
pixels[0][offset] = 0x7F;
|
|
bitmap.installPixels(imageInfo, (void*) pixels, sizeof(pixels[0]));
|
|
canvas->drawImageRect(bitmap.asImage(), SkRect::MakeWH(8, 8), SkRect::MakeWH(128, 128),
|
|
SkSamplingOptions(), &paint, SkCanvas::kStrict_SrcRectConstraint);
|
|
}
|
|
} // END FIDDLE
|