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/*
* 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::createRenderSurface(sk_sp<GrRenderTarget> rt, int colorBits) {
auto flags = (fSurfaceProps.flags() & ~SkSurfaceProps::kGammaCorrect_Flag) |
(GrPixelConfigIsSRGB(fPixelConfig) ? SkSurfaceProps::kGammaCorrect_Flag : 0);
SkSurfaceProps props(flags, fSurfaceProps.pixelGeometry());
if (!this->isGpuContext() || colorBits > 24 ||
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,
kUnknown_SkAlphaType,
fDisplayParams.fProfileType);
return SkSurface::MakeRenderTarget(fContext, SkBudgeted::kNo, info,
fDisplayParams.fMSAASampleCount, &props);
} else {
return SkSurface::MakeRenderTargetDirect(rt.get(), &props);
}
}
void WindowContext::presentRenderSurface(sk_sp<SkSurface> renderSurface, sk_sp<GrRenderTarget> rt,
int colorBits) {
if (!this->isGpuContext() || colorBits > 24 ||
kRGBA_F16_SkColorType == fDisplayParams.fColorType) {
// We made/have an off-screen surface. Get the contents as an SkImage:
SkImageInfo info = SkImageInfo::Make(fWidth, fHeight,
fDisplayParams.fColorType,
kUnknown_SkAlphaType,
fDisplayParams.fProfileType);
SkBitmap bm;
bm.allocPixels(info);
renderSurface->getCanvas()->readPixels(&bm, 0, 0);
SkPixmap pm;
bm.peekPixels(&pm);
sk_sp<SkImage> image(SkImage::MakeTextureFromPixmap(fContext, pm,
SkBudgeted::kNo));
GrTexture* texture = as_IB(image)->peekTexture();
SkASSERT(texture);
// With ten-bit output, we need to manually apply the gamma of the output device
// (unless we're in non-gamma correct mode, in which case our data is already
// fake-sRGB, like we're expected to put in the 10-bit buffer):
bool doGamma = (colorBits == 30) && SkImageInfoIsGammaCorrect(info);
fContext->applyGamma(rt.get(), texture, doGamma ? 1.0f / 2.2f : 1.0f);
}
}
} //namespace sk_app
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