Flutter Engine
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Surface_draw.cpp
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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.
4// HASH=0de693f4d8dd898a60be8cfba23952be
5REG_FIDDLE(Surface_draw, 256, 64, false, 0) {
6void draw(SkCanvas* canvas) {
8 sk_sp<SkSurface> lil(big->makeSurface(SkImageInfo::MakeN32(32, 32, kPremul_SkAlphaType)));
9 big->getCanvas()->clear(SK_ColorRED);
10 lil->getCanvas()->clear(SK_ColorBLACK);
11 lil->draw(big->getCanvas(), 16, 16);
12 SkPixmap pixmap;
13 if (big->peekPixels(&pixmap)) {
14 SkBitmap bigBits;
15 bigBits.installPixels(pixmap);
16 canvas->drawImage(bigBits.asImage(), 0, 0);
17 }
18}
19} // END FIDDLE
@ kPremul_SkAlphaType
pixel components are premultiplied by alpha
Definition SkAlphaType.h:29
constexpr SkColor SK_ColorRED
Definition SkColor.h:126
constexpr SkColor SK_ColorBLACK
Definition SkColor.h:103
static void draw(SkCanvas *canvas, SkRect &target, int x, int y)
Definition aaclip.cpp:27
sk_sp< SkImage > asImage() const
Definition SkBitmap.cpp:645
bool installPixels(const SkImageInfo &info, void *pixels, size_t rowBytes, void(*releaseProc)(void *addr, void *context), void *context)
Definition SkBitmap.cpp:323
void drawImage(const SkImage *image, SkScalar left, SkScalar top)
Definition SkCanvas.h:1528
#define REG_FIDDLE(NAME, W, H, TEXT, I)
Definition examples.h:60
SK_API sk_sp< SkSurface > Raster(const SkImageInfo &imageInfo, size_t rowBytes, const SkSurfaceProps *surfaceProps)
static SkImageInfo MakeN32Premul(int width, int height)
static SkImageInfo MakeN32(int width, int height, SkAlphaType at)