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Skia Fiddle
Skia Version:
bd99c0
static sk_sp<SkImage> create_gpu_image(GrContext* grContext) { const SkImageInfo info = SkImageInfo::MakeN32(20, 20, kOpaque_SkAlphaType); auto surface(SkSurface::MakeRenderTarget(grContext, SkBudgeted::kNo, info)); SkCanvas* canvas = surface->getCanvas(); canvas->clear(SK_ColorWHITE); SkPaint paint; paint.setColor(SK_ColorBLACK); canvas->drawRect(SkRect::MakeXYWH(5, 5, 10, 10), paint); return surface->makeImageSnapshot(); } void draw(SkCanvas* canvas) { GrContext* grContext = canvas->getGrContext(); if (!grContext) { return; } sk_sp<SkImage> backEndImage = create_gpu_image(grContext); canvas->drawImage(backEndImage, 0, 0); GrBackendTexture texture; SkImage::BackendTextureReleaseProc proc; if (!SkImage::MakeBackendTextureFromSkImage(grContext, std::move(backEndImage), &texture, &proc)) { return; } sk_sp<SkImage> i2 = SkImage::MakeFromTexture(grContext, texture, kTopLeft_GrSurfaceOrigin, kN32_SkColorType, kOpaque_SkAlphaType, nullptr); canvas->drawImage(i2, 30, 30); }
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