f750fbcb69
WindowContext still supports color spaces, but not other color types. Any off-screen rendering is the app's responsibility. This change also adds (working) F16 support to viewer. Note that the previous 10-bit and FP16 support in WindowContext was broken. There was no code to push the off-screen canvas to the window. If you ever made it to the unreachable off-screen code path in createSurface, it would have simply stopped drawing. The decision to limit the window's gamut to sRGB is mostly driven by my desire to add real-time editing of gamut. This design lets us do that, without tearing down and rebuilding the window for every change. An application could still supply a different gamut via setDisplayParams and render directly to the back buffer with proper color correction. BUG=skia: Change-Id: I94df35c7a42faee396009acc83683e40bb3c284d Reviewed-on: https://skia-review.googlesource.com/8153 Reviewed-by: Jim Van Verth <jvanverth@google.com> Reviewed-by: Matt Sarett <msarett@google.com> Commit-Queue: Brian Osman <brianosman@google.com>
100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
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/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "GrContext.h"
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#include "SkSurface.h"
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#include "GLWindowContext.h"
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#include "gl/GrGLDefines.h"
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#include "gl/GrGLUtil.h"
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#include "GrRenderTarget.h"
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#include "GrContext.h"
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#include "SkCanvas.h"
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#include "SkImage_Base.h"
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namespace sk_app {
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GLWindowContext::GLWindowContext(const DisplayParams& params)
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: WindowContext()
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, fBackendContext(nullptr)
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, fSurface(nullptr) {
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fDisplayParams = params;
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}
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void GLWindowContext::initializeContext() {
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this->onInitializeContext();
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sk_sp<const GrGLInterface> glInterface;
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glInterface.reset(GrGLCreateNativeInterface());
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fBackendContext.reset(GrGLInterfaceRemoveNVPR(glInterface.get()));
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SkASSERT(nullptr == fContext);
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fContext = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)fBackendContext.get());
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// We may not have real sRGB support (ANGLE, in particular), so check for
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// that, and fall back to L32:
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fPixelConfig = fContext->caps()->srgbSupport() && fDisplayParams.fColorSpace
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? kSRGBA_8888_GrPixelConfig : kRGBA_8888_GrPixelConfig;
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}
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void GLWindowContext::destroyContext() {
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fSurface.reset(nullptr);
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if (fContext) {
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// in case we have outstanding refs to this guy (lua?)
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fContext->abandonContext();
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fContext->unref();
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fContext = nullptr;
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}
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fBackendContext.reset(nullptr);
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this->onDestroyContext();
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}
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sk_sp<SkSurface> GLWindowContext::getBackbufferSurface() {
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if (nullptr == fSurface) {
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if (fContext) {
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GrBackendRenderTargetDesc desc;
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desc.fWidth = this->fWidth;
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desc.fHeight = this->fHeight;
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desc.fConfig = fPixelConfig;
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desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
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desc.fSampleCnt = fSampleCount;
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desc.fStencilBits = fStencilBits;
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GrGLint buffer;
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GR_GL_CALL(fBackendContext.get(), GetIntegerv(GR_GL_FRAMEBUFFER_BINDING, &buffer));
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desc.fRenderTargetHandle = buffer;
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fSurface = SkSurface::MakeFromBackendRenderTarget(fContext, desc,
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fDisplayParams.fColorSpace,
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&fSurfaceProps);
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}
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}
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return fSurface;
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}
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void GLWindowContext::swapBuffers() {
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this->onSwapBuffers();
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}
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void GLWindowContext::resize(int w, int h) {
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this->destroyContext();
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this->initializeContext();
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}
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void GLWindowContext::setDisplayParams(const DisplayParams& params) {
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this->destroyContext();
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fDisplayParams = params;
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this->initializeContext();
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}
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} //namespace sk_app
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