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Diffstat (limited to 'tools/viewer/sk_app/GLWindowContext.cpp')
-rw-r--r-- | tools/viewer/sk_app/GLWindowContext.cpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/tools/viewer/sk_app/GLWindowContext.cpp b/tools/viewer/sk_app/GLWindowContext.cpp new file mode 100644 index 0000000000..a491321a2a --- /dev/null +++ b/tools/viewer/sk_app/GLWindowContext.cpp @@ -0,0 +1,112 @@ + +/* + * 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 "GLWindowContext.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 { + +GLWindowContext::GLWindowContext(void* platformData, const DisplayParams& params) + : WindowContext() + , fBackendContext(nullptr) + , fRenderTarget(nullptr) + , fSurface(nullptr) { +} + +void GLWindowContext::initializeContext(void* platformData, const DisplayParams& params) { + + this->onInitializeContext(platformData, params); + + fDisplayParams = params; + + SkAutoTUnref<const GrGLInterface> glInterface; + glInterface.reset(GrGLCreateNativeInterface()); + fBackendContext.reset(GrGLInterfaceRemoveNVPR(glInterface.get())); + + SkASSERT(nullptr == fContext); + fContext = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)fBackendContext.get()); + + // We may not have real sRGB support (ANGLE, in particular), so check for + // that, and fall back to L32: + // + // ... and, if we're using a 10-bit/channel FB0, it doesn't do sRGB conversion on write, + // so pretend that it's non-sRGB 8888: + fPixelConfig = fContext->caps()->srgbSupport() && + SkColorAndProfileAreGammaCorrect(fDisplayParams.fColorType, + fDisplayParams.fProfileType) && + (fColorBits != 30) ? kSkiaGamma8888_GrPixelConfig : kSkia8888_GrPixelConfig; +} + +void GLWindowContext::destroyContext() { + fSurface.reset(nullptr); + fRenderTarget.reset(nullptr); + + if (fContext) { + // in case we have outstanding refs to this guy (lua?) + fContext->abandonContext(); + fContext->unref(); + fContext = nullptr; + } + + fBackendContext.reset(nullptr); + + this->onDestroyContext(); +} + +sk_sp<SkSurface> GLWindowContext::getBackbufferSurface() { + if (nullptr == fSurface) { + fActualColorBits = SkTMax(fColorBits, 24); + + if (fContext) { + GrBackendRenderTargetDesc desc; + desc.fWidth = this->fWidth; + desc.fHeight = this->fHeight; + desc.fConfig = fPixelConfig; + desc.fOrigin = kBottomLeft_GrSurfaceOrigin; + desc.fSampleCnt = fSampleCount; + desc.fStencilBits = fStencilBits; + GrGLint buffer; + GR_GL_CALL(fBackendContext, GetIntegerv(GR_GL_FRAMEBUFFER_BINDING, &buffer)); + desc.fRenderTargetHandle = buffer; + fRenderTarget.reset(fContext->textureProvider()->wrapBackendRenderTarget(desc)); + + fSurface = this->createRenderSurface(fRenderTarget, fActualColorBits); + } + } + + return fSurface; +} + +void GLWindowContext::swapBuffers() { + this->presentRenderSurface(fSurface, fRenderTarget, fActualColorBits); + this->onSwapBuffers(); +} + +void GLWindowContext::resize(uint32_t w, uint32_t h) { + this->destroyContext(); + + this->initializeContext(nullptr, fDisplayParams); +} + +void GLWindowContext::setDisplayParams(const DisplayParams& params) { + this->destroyContext(); + + this->initializeContext(nullptr, params); +} + +} //namespace sk_app |