submodule/skia/docs/examples/ImageInfo_MakeS32.cpp

   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.
   3 #include "tools/fiddle/examples.h"
   4 // HASH=de418ccb42471d1589508ef3955f8c53
   5 REG_FIDDLE(ImageInfo_MakeS32, 256, 128, false, 0) {
   6 void draw(SkCanvas* canvas) {
   7     const int width = 256;
   8     const int height = 32;
   9     SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
  10     SkColor  gradColors[] = { 0xFFAA0055, 0xFF11CC88 };
  11     SkPoint  gradPoints[] = { { 0, 0 }, { width, 0 } };
  12     SkPaint gradPaint;
  13     gradPaint.setShader(SkGradientShader::MakeLinear(gradPoints, gradColors, nullptr,
  14                     SK_ARRAY_COUNT(gradColors), SkTileMode::kClamp));
  15     SkBitmap bitmap;
  16     bitmap.allocPixels(SkImageInfo::MakeN32(width, height, kPremul_SkAlphaType));
  17     SkCanvas offScreen(bitmap);
  18     offScreen.drawRect(SkRect::MakeWH(width, height), gradPaint);
  19     canvas->drawImage(bitmap.asImage(), 0, 0);
  20     bitmap.allocPixels(SkImageInfo::MakeS32(width, height, kPremul_SkAlphaType));
  21     SkCanvas sRGBOffscreen(bitmap);
  22     sRGBOffscreen.drawRect(SkRect::MakeWH(width, height), gradPaint);
  23     canvas->drawImage(bitmap.asImage(), 0, 48);
  24     SkBitmap noColorSpaceBitmap;
  25     noColorSpaceBitmap.setInfo(SkImageInfo::MakeN32(width, height, kPremul_SkAlphaType));
  26     noColorSpaceBitmap.setPixels(bitmap.getAddr(0, 0));
  27     canvas->drawImage(noColorSpaceBitmap.asImage(), 0, 96);
  28 }
  29 }  // END FIDDLE