skia2/tools/viewer/sk_app/WindowContext.cpp

60 lines
2.0 KiB
C++
Executable File

/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrContext.h"
#include "SkSurface.h"
#include "WindowContext.h"
#include "gl/GrGLDefines.h"
#include "gl/GrGLUtil.h"
#include "GrRenderTarget.h"
#include "GrContext.h"
#include "SkCanvas.h"
#include "SkImage_Base.h"
namespace sk_app {
sk_sp<SkSurface> WindowContext::createOffscreenSurface(bool forceSRGB) {
return createSurface(nullptr, 0, true, forceSRGB);
}
sk_sp<SkSurface> WindowContext::createRenderSurface(GrBackendRenderTargetDesc desc, int colorBits) {
return createSurface(&desc, colorBits, false, false);
}
sk_sp<SkSurface> WindowContext::createSurface(
GrBackendRenderTargetDesc* rtDesc, int colorBits, bool offscreen, bool forceSRGB) {
if (!this->isGpuContext() || colorBits > 24 || offscreen ||
kRGBA_F16_SkColorType == fDisplayParams.fColorType) {
// If we're rendering to F16, we need an off-screen surface - the current render
// target is most likely the wrong format.
//
// If we're rendering raster data or using a deep (10-bit or higher) surface, we probably
// need an off-screen surface. 10-bit, in particular, has strange gamma behavior.
SkImageInfo info = SkImageInfo::Make(
fWidth, fHeight,
fDisplayParams.fColorType,
kPremul_SkAlphaType,
forceSRGB ? SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named)
: fDisplayParams.fColorSpace
);
if (this->isGpuContext()) {
return SkSurface::MakeRenderTarget(fContext, SkBudgeted::kNo, info,
fDisplayParams.fMSAASampleCount, &fSurfaceProps);
} else {
return SkSurface::MakeRaster(info, &fSurfaceProps);
}
} else {
return SkSurface::MakeFromBackendRenderTarget(fContext, *rtDesc, &fSurfaceProps);
}
}
} //namespace sk_app