1*c8dee2aaSAndroid Build Coastguard Worker // Copyright 2019 Google LLC.
2*c8dee2aaSAndroid Build Coastguard Worker // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3*c8dee2aaSAndroid Build Coastguard Worker #include "tools/fiddle/examples.h"
4*c8dee2aaSAndroid Build Coastguard Worker REG_FIDDLE(Pixmap_readPixels, 256, 128, false, 0) {
draw(SkCanvas * canvas)5*c8dee2aaSAndroid Build Coastguard Worker void draw(SkCanvas* canvas) {
6*c8dee2aaSAndroid Build Coastguard Worker std::vector<int32_t> pixels;
7*c8dee2aaSAndroid Build Coastguard Worker const int width = 256;
8*c8dee2aaSAndroid Build Coastguard Worker const int height = 64;
9*c8dee2aaSAndroid Build Coastguard Worker pixels.resize(height * width * 4);
10*c8dee2aaSAndroid Build Coastguard Worker SkImageInfo srcInfo = SkImageInfo::MakeN32Premul(width, height);
11*c8dee2aaSAndroid Build Coastguard Worker SkPixmap srcPixmap(srcInfo, (const void*) &pixels.front(), width * 4);
12*c8dee2aaSAndroid Build Coastguard Worker SkColor gradColors[] = { 0xFFAA3300, 0x7F881122 };
13*c8dee2aaSAndroid Build Coastguard Worker SkPoint gradPoints[] = { { 0, 0 }, { 256, 0 } };
14*c8dee2aaSAndroid Build Coastguard Worker SkPaint paint;
15*c8dee2aaSAndroid Build Coastguard Worker paint.setShader(SkGradientShader::MakeLinear(gradPoints, gradColors, nullptr,
16*c8dee2aaSAndroid Build Coastguard Worker std::size(gradColors), SkTileMode::kClamp));
17*c8dee2aaSAndroid Build Coastguard Worker SkBitmap bitmap;
18*c8dee2aaSAndroid Build Coastguard Worker bitmap.installPixels(srcPixmap);
19*c8dee2aaSAndroid Build Coastguard Worker SkCanvas srcCanvas(bitmap);
20*c8dee2aaSAndroid Build Coastguard Worker srcCanvas.drawRect(SkRect::MakeWH(width, height), paint);
21*c8dee2aaSAndroid Build Coastguard Worker canvas->drawImage(bitmap.asImage(), 0, 0);
22*c8dee2aaSAndroid Build Coastguard Worker std::vector<int32_t> dstPixels;
23*c8dee2aaSAndroid Build Coastguard Worker dstPixels.resize(height * width * 2);
24*c8dee2aaSAndroid Build Coastguard Worker SkImageInfo dstInfo = srcInfo.makeColorType(kARGB_4444_SkColorType);
25*c8dee2aaSAndroid Build Coastguard Worker srcPixmap.readPixels(dstInfo, &dstPixels.front(), width * 2);
26*c8dee2aaSAndroid Build Coastguard Worker SkPixmap dstPixmap(dstInfo, &dstPixels.front(), width * 2);
27*c8dee2aaSAndroid Build Coastguard Worker bitmap.installPixels(dstPixmap);
28*c8dee2aaSAndroid Build Coastguard Worker canvas->drawImage(bitmap.asImage(), 0, 128);
29*c8dee2aaSAndroid Build Coastguard Worker }
30*c8dee2aaSAndroid Build Coastguard Worker } // END FIDDLE
31