| // 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=df4e355c4845350daede833b4fd21ec1 |
| REG_FIDDLE(Pixmap_readPixels, 256, 128, false, 0) { |
| void draw(SkCanvas* canvas) { |
| std::vector<int32_t> pixels; |
| const int width = 256; |
| const int height = 64; |
| pixels.resize(height * width * 4); |
| SkImageInfo srcInfo = SkImageInfo::MakeN32Premul(width, height); |
| SkPixmap srcPixmap(srcInfo, (const void*) &pixels.front(), width * 4); |
| SkColor gradColors[] = { 0xFFAA3300, 0x7F881122 }; |
| SkPoint gradPoints[] = { { 0, 0 }, { 256, 0 } }; |
| SkPaint paint; |
| paint.setShader(SkGradientShader::MakeLinear(gradPoints, gradColors, nullptr, |
| std::size(gradColors), SkTileMode::kClamp)); |
| SkBitmap bitmap; |
| bitmap.installPixels(srcPixmap); |
| SkCanvas srcCanvas(bitmap); |
| srcCanvas.drawRect(SkRect::MakeWH(width, height), paint); |
| canvas->drawImage(bitmap.asImage(), 0, 0); |
| std::vector<int32_t> dstPixels; |
| dstPixels.resize(height * width * 2); |
| SkImageInfo dstInfo = srcInfo.makeColorType(kARGB_4444_SkColorType); |
| srcPixmap.readPixels(dstInfo, &dstPixels.front(), width * 2); |
| SkPixmap dstPixmap(dstInfo, &dstPixels.front(), width * 2); |
| bitmap.installPixels(dstPixmap); |
| canvas->drawImage(bitmap.asImage(), 0, 128); |
| } |
| } // END FIDDLE |