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Unified Diff: tools/viewer/sk_app/GLWindowContext.cpp

Issue 1978573003: Add OpenGL context to Viewer. (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Rebase to ToT Created 4 years, 7 months ago
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Index: tools/viewer/sk_app/GLWindowContext.cpp
diff --git a/tools/viewer/sk_app/GLWindowContext.cpp b/tools/viewer/sk_app/GLWindowContext.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a491321a2ac97f980c08680ef791badb6fba0091
--- /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
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