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Diffstat (limited to 'gfx/gl/GLContextProviderEAGL.mm')
| -rw-r--r-- | gfx/gl/GLContextProviderEAGL.mm | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/gfx/gl/GLContextProviderEAGL.mm b/gfx/gl/GLContextProviderEAGL.mm new file mode 100644 index 0000000000..4aabe89df1 --- /dev/null +++ b/gfx/gl/GLContextProviderEAGL.mm @@ -0,0 +1,211 @@ +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "GLContextProvider.h" +#include "GLContextEAGL.h" +#include "nsDebug.h" +#include "nsIWidget.h" +#include "gfxFailure.h" +#include "prenv.h" +#include "mozilla/Preferences.h" +#include "mozilla/ProfilerLabels.h" +#include "mozilla/layers/CompositorOptions.h" +#include "mozilla/widget/CompositorWidget.h" + +#import <UIKit/UIKit.h> + +namespace mozilla { +namespace gl { + +using namespace mozilla::widget; + +GLContextEAGL::GLContextEAGL(const GLContextDesc& desc, EAGLContext* context, + GLContext* sharedContext) + : GLContext(desc, sharedContext), mContext(context) {} + +GLContextEAGL::~GLContextEAGL() { + MakeCurrent(); + + if (mBackbufferFB) { + fDeleteFramebuffers(1, &mBackbufferFB); + } + + if (mBackbufferRB) { + fDeleteRenderbuffers(1, &mBackbufferRB); + } + + MarkDestroyed(); + + if (mLayer) { + mLayer = nil; + } + + if (mContext) { + [EAGLContext setCurrentContext:nil]; + [mContext release]; + } +} + +bool GLContextEAGL::AttachToWindow(nsIWidget* aWidget) { + // This should only be called once + MOZ_ASSERT(!mBackbufferFB && !mBackbufferRB); + + UIView* view = reinterpret_cast<UIView*>(aWidget->GetNativeData(NS_NATIVE_WIDGET)); + + if (!view) { + MOZ_CRASH("no view!"); + } + + mLayer = [view layer]; + + fGenFramebuffers(1, &mBackbufferFB); + return RecreateRB(); +} + +bool GLContextEAGL::RecreateRB() { + MakeCurrent(); + + CAEAGLLayer* layer = (CAEAGLLayer*)mLayer; + + if (mBackbufferRB) { + // It doesn't seem to be enough to just call renderbufferStorage: below, + // we apparently have to recreate the RB. + fDeleteRenderbuffers(1, &mBackbufferRB); + mBackbufferRB = 0; + } + + fGenRenderbuffers(1, &mBackbufferRB); + fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mBackbufferRB); + + [mContext renderbufferStorage:LOCAL_GL_RENDERBUFFER fromDrawable:layer]; + + fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mBackbufferFB); + fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_COLOR_ATTACHMENT0, LOCAL_GL_RENDERBUFFER, + mBackbufferRB); + + return LOCAL_GL_FRAMEBUFFER_COMPLETE == fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER); +} + +bool GLContextEAGL::MakeCurrentImpl() const { + if (mContext) { + if (![EAGLContext setCurrentContext:mContext]) { + return false; + } + } + return true; +} + +bool GLContextEAGL::IsCurrentImpl() const { return [EAGLContext currentContext] == mContext; } + +static PRFuncPtr GLAPIENTRY GetLoadedProcAddress(const char* const name) { + PRLibrary* lib = nullptr; + const auto& ret = PR_FindFunctionSymbolAndLibrary(name, &leakedLibRef); + if (lib) { + PR_UnloadLibrary(lib); + } + return ret; +} + +Maybe<SymbolLoader> GLContextEAGL::GetSymbolLoader() const { + return Some(SymbolLoader(&GetLoadedProcAddress)); +} + +bool GLContextEAGL::IsDoubleBuffered() const { return true; } + +bool GLContextEAGL::SwapBuffers() { + AUTO_PROFILER_LABEL("GLContextEAGL::SwapBuffers", GRAPHICS); + + [mContext presentRenderbuffer:LOCAL_GL_RENDERBUFFER]; + return true; +} + +void GLContextEAGL::GetWSIInfo(nsCString* const out) const { out->AppendLiteral("EAGL"); } + +static GLContextEAGL* GetGlobalContextEAGL() { + return static_cast<GLContextEAGL*>(GLContextProviderEAGL::GetGlobalContext()); +} + +static RefPtr<GLContext> CreateEAGLContext(const GLContextDesc& desc, + GLContextEAGL* sharedContext) { + EAGLRenderingAPI apis[] = {kEAGLRenderingAPIOpenGLES3, kEAGLRenderingAPIOpenGLES2}; + + // Try to create a GLES3 context if we can, otherwise fall back to GLES2 + EAGLContext* context = nullptr; + for (EAGLRenderingAPI api : apis) { + if (sharedContext) { + context = [[EAGLContext alloc] initWithAPI:api + sharegroup:sharedContext->GetEAGLContext().sharegroup]; + } else { + context = [[EAGLContext alloc] initWithAPI:api]; + } + + if (context) { + break; + } + } + + if (!context) { + return nullptr; + } + + RefPtr<GLContextEAGL> glContext = new GLContextEAGL(desc, context, sharedContext); + if (!glContext->Init()) { + glContext = nullptr; + return nullptr; + } + + return glContext; +} + +already_AddRefed<GLContext> GLContextProviderEAGL::CreateForCompositorWidget( + CompositorWidget* aCompositorWidget, bool aHardwareWebRender, bool aForceAccelerated) { + if (!aCompositorWidget) { + MOZ_ASSERT(false); + return nullptr; + } + + const GLContextDesc desc = {}; + auto glContext = CreateEAGLContext(desc, GetGlobalContextEAGL()); + if (!glContext) { + return nullptr; + } + + if (!GLContextEAGL::Cast(glContext)->AttachToWindow(aCompositorWidget->RealWidget())) { + return nullptr; + } + + return glContext.forget(); +} + +already_AddRefed<GLContext> GLContextProviderEAGL::CreateHeadless( + const GLContextCreateDesc& createDesc, nsACString* const out_failureId) { + auto desc = GLContextDesc{createDesc}; + desc.isOffcreen = true; + return CreateEAGLContext(desc, GetGlobalContextEAGL()).forget(); +} + +static RefPtr<GLContext> gGlobalContext; + +GLContext* GLContextProviderEAGL::GetGlobalContext() { + static bool triedToCreateContext = false; + if (!triedToCreateContext) { + triedToCreateContext = true; + + MOZ_RELEASE_ASSERT(!gGlobalContext, "GFX: Global GL context already initialized."); + RefPtr<GLContext> temp = CreateHeadless(CreateContextFlags::NONE); + gGlobalContext = temp; + + if (!gGlobalContext) { + MOZ_CRASH("Failed to create global context"); + } + } + + return gGlobalContext; +} + +void GLContextProviderEAGL::Shutdown() { gGlobalContext = nullptr; } + +} /* namespace gl */ +} /* namespace mozilla */ |