xref: /third_party/skia/docs/examples/ImageInfo_MakeS32.cpp (revision cb93a386)
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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
5REG_FIDDLE(ImageInfo_MakeS32, 256, 128, false, 0) {
6void 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
30

Indexes created Thu Nov 07 10:32:03 CST 2024