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=e9f70cbc9827097449a386ec7a8a8188 5 REG_FIDDLE(Bitmap_readPixels_2, 256, 256, false, 3) { draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) { 7 std::vector<int32_t> srcPixels; 8 srcPixels.resize(source.height() * source.rowBytes()); 9 for (int y = 0; y < 4; ++y) { 10 for (int x = 0; x < 4; ++x) { 11 SkPixmap pixmap(SkImageInfo::MakeN32Premul(source.width() / 4, source.height() / 4), 12 &srcPixels.front() + x * source.height() * source.width() / 4 + 13 y * source.width() / 4, source.rowBytes()); 14 source.readPixels(pixmap, x * source.width() / 4, y * source.height() / 4); 15 } 16 } 17 canvas->scale(.5f, .5f); 18 SkBitmap bitmap; 19 bitmap.installPixels(SkImageInfo::MakeN32Premul(source.width(), source.height()), 20 &srcPixels.front(), source.rowBytes()); 21 canvas->drawBitmap(bitmap, 0, 0); 22 } 23 } // END FIDDLE 24