113 lines
3.2 KiB
C++
113 lines
3.2 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(void* platformData, const DisplayParams& params)
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: WindowContext()
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, fBackendContext(nullptr)
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, fRenderTarget(nullptr)
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, fSurface(nullptr) {
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}
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void GLWindowContext::initializeContext(void* platformData, const DisplayParams& params) {
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this->onInitializeContext(platformData, params);
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fDisplayParams = params;
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SkAutoTUnref<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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//
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// ... and, if we're using a 10-bit/channel FB0, it doesn't do sRGB conversion on write,
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// so pretend that it's non-sRGB 8888:
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fPixelConfig = fContext->caps()->srgbSupport() &&
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SkColorAndProfileAreGammaCorrect(fDisplayParams.fColorType,
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fDisplayParams.fProfileType) &&
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(fColorBits != 30) ? kSkiaGamma8888_GrPixelConfig : kSkia8888_GrPixelConfig;
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}
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void GLWindowContext::destroyContext() {
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fSurface.reset(nullptr);
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fRenderTarget.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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fActualColorBits = SkTMax(fColorBits, 24);
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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, GetIntegerv(GR_GL_FRAMEBUFFER_BINDING, &buffer));
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desc.fRenderTargetHandle = buffer;
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fRenderTarget.reset(fContext->textureProvider()->wrapBackendRenderTarget(desc));
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fSurface = this->createRenderSurface(fRenderTarget, fActualColorBits);
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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->presentRenderSurface(fSurface, fRenderTarget, fActualColorBits);
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this->onSwapBuffers();
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}
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void GLWindowContext::resize(uint32_t w, uint32_t h) {
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this->destroyContext();
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this->initializeContext(nullptr, fDisplayParams);
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}
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void GLWindowContext::setDisplayParams(const DisplayParams& params) {
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this->destroyContext();
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this->initializeContext(nullptr, params);
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}
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} //namespace sk_app
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