skia2/docs/examples/ImageInfo_computeOffset.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

29 lines
1.6 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->drawBitmapRect(bitmap, SkRect::MakeWH(8, 8), SkRect::MakeWH(32, 32), &paint);
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->drawBitmapRect(bitmap, SkRect::MakeWH(8, 8), SkRect::MakeWH(128, 128), &paint);
}
} // END FIDDLE