зеркало из https://github.com/mozilla/gecko-dev.git
394 строки
10 KiB
Plaintext
394 строки
10 KiB
Plaintext
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "GLContextProvider.h"
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#include "GLContextCGL.h"
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#include "TextureImageCGL.h"
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#include "nsDebug.h"
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#include "nsIWidget.h"
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#include <OpenGL/gl.h>
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#include "gfxFailure.h"
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#include "gfxPrefs.h"
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#include "prenv.h"
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#include "GeckoProfiler.h"
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#include "mozilla/gfx/MacIOSurface.h"
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#include <OpenGL/OpenGL.h>
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// When running inside a VM, creating an accelerated OpenGL context usually
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// fails. Uncomment this line to emulate that behavior.
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// #define EMULATE_VM
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namespace mozilla {
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namespace gl {
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using namespace mozilla::gfx;
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class CGLLibrary
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{
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public:
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CGLLibrary()
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: mInitialized(false)
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, mUseDoubleBufferedWindows(true)
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, mOGLLibrary(nullptr)
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{}
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bool EnsureInitialized()
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{
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if (mInitialized) {
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return true;
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}
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if (!mOGLLibrary) {
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mOGLLibrary = PR_LoadLibrary("/System/Library/Frameworks/OpenGL.framework/OpenGL");
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if (!mOGLLibrary) {
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NS_WARNING("Couldn't load OpenGL Framework.");
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return false;
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}
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}
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const char* db = PR_GetEnv("MOZ_CGL_DB");
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if (db) {
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mUseDoubleBufferedWindows = *db != '0';
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}
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mInitialized = true;
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return true;
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}
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bool UseDoubleBufferedWindows() const {
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MOZ_ASSERT(mInitialized);
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return mUseDoubleBufferedWindows;
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}
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private:
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bool mInitialized;
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bool mUseDoubleBufferedWindows;
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PRLibrary* mOGLLibrary;
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};
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CGLLibrary sCGLLibrary;
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GLContextCGL::GLContextCGL(CreateContextFlags flags, const SurfaceCaps& caps,
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NSOpenGLContext* context, bool isOffscreen,
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ContextProfile profile)
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: GLContext(flags, caps, nullptr, isOffscreen)
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, mContext(context)
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{
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SetProfileVersion(profile, 210);
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}
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GLContextCGL::~GLContextCGL()
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{
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MarkDestroyed();
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if (mContext) {
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if ([NSOpenGLContext currentContext] == mContext) {
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// Clear the current context before releasing. If we don't do
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// this, the next time we call [NSOpenGLContext currentContext],
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// "invalid context" will be printed to the console.
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[NSOpenGLContext clearCurrentContext];
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}
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[mContext release];
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}
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}
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bool
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GLContextCGL::Init()
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{
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if (!InitWithPrefix("gl", true))
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return false;
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return true;
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}
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CGLContextObj
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GLContextCGL::GetCGLContext() const
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{
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return static_cast<CGLContextObj>([mContext CGLContextObj]);
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}
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bool
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GLContextCGL::MakeCurrentImpl(bool aForce)
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{
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if (!aForce && [NSOpenGLContext currentContext] == mContext) {
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return true;
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}
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if (mContext) {
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[mContext makeCurrentContext];
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MOZ_ASSERT(IsCurrent());
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// Use non-blocking swap in "ASAP mode".
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// ASAP mode means that rendering is iterated as fast as possible.
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// ASAP mode is entered when layout.frame_rate=0 (requires restart).
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// If swapInt is 1, then glSwapBuffers will block and wait for a vblank signal.
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// When we're iterating as fast as possible, however, we want a non-blocking
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// glSwapBuffers, which will happen when swapInt==0.
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GLint swapInt = gfxPrefs::LayoutFrameRate() == 0 ? 0 : 1;
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[mContext setValues:&swapInt forParameter:NSOpenGLCPSwapInterval];
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}
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return true;
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}
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bool
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GLContextCGL::IsCurrent() {
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return [NSOpenGLContext currentContext] == mContext;
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}
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GLenum
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GLContextCGL::GetPreferredARGB32Format() const
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{
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return LOCAL_GL_BGRA;
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}
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bool
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GLContextCGL::SetupLookupFunction()
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{
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return false;
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}
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bool
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GLContextCGL::IsDoubleBuffered() const
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{
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return sCGLLibrary.UseDoubleBufferedWindows();
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}
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bool
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GLContextCGL::SwapBuffers()
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{
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PROFILER_LABEL("GLContextCGL", "SwapBuffers",
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js::ProfileEntry::Category::GRAPHICS);
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[mContext flushBuffer];
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return true;
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}
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already_AddRefed<GLContext>
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GLContextProviderCGL::CreateWrappingExisting(void*, void*)
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{
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return nullptr;
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}
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static const NSOpenGLPixelFormatAttribute kAttribs_singleBuffered[] = {
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NSOpenGLPFAAllowOfflineRenderers,
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0
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};
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static const NSOpenGLPixelFormatAttribute kAttribs_singleBuffered_accel[] = {
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NSOpenGLPFAAccelerated,
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NSOpenGLPFAAllowOfflineRenderers,
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0
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};
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static const NSOpenGLPixelFormatAttribute kAttribs_doubleBuffered[] = {
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NSOpenGLPFAAllowOfflineRenderers,
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NSOpenGLPFADoubleBuffer,
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0
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};
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static const NSOpenGLPixelFormatAttribute kAttribs_doubleBuffered_accel[] = {
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NSOpenGLPFAAccelerated,
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NSOpenGLPFAAllowOfflineRenderers,
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NSOpenGLPFADoubleBuffer,
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0
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};
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static const NSOpenGLPixelFormatAttribute kAttribs_offscreen[] = {
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0
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};
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static const NSOpenGLPixelFormatAttribute kAttribs_offscreen_allow_offline[] = {
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NSOpenGLPFAAllowOfflineRenderers,
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0
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};
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static const NSOpenGLPixelFormatAttribute kAttribs_offscreen_accel[] = {
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NSOpenGLPFAAccelerated,
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0
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};
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static const NSOpenGLPixelFormatAttribute kAttribs_offscreen_coreProfile[] = {
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NSOpenGLPFAAccelerated,
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NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersion3_2Core,
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0
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};
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static NSOpenGLContext*
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CreateWithFormat(const NSOpenGLPixelFormatAttribute* attribs)
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{
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NSOpenGLPixelFormat* format = [[NSOpenGLPixelFormat alloc]
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initWithAttributes:attribs];
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if (!format) {
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NS_WARNING("Failed to create NSOpenGLPixelFormat.");
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return nullptr;
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}
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NSOpenGLContext* context = [[NSOpenGLContext alloc] initWithFormat:format
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shareContext:nullptr];
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[format release];
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return context;
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}
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already_AddRefed<GLContext>
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GLContextProviderCGL::CreateForWindow(nsIWidget* aWidget, bool aForceAccelerated)
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{
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if (!sCGLLibrary.EnsureInitialized()) {
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return nullptr;
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}
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#ifdef EMULATE_VM
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if (aForceAccelerated) {
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return nullptr;
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}
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#endif
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const NSOpenGLPixelFormatAttribute* attribs;
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if (sCGLLibrary.UseDoubleBufferedWindows()) {
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attribs = aForceAccelerated ? kAttribs_doubleBuffered_accel : kAttribs_doubleBuffered;
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} else {
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attribs = aForceAccelerated ? kAttribs_singleBuffered_accel : kAttribs_singleBuffered;
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}
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NSOpenGLContext* context = CreateWithFormat(attribs);
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if (!context) {
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return nullptr;
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}
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// make the context transparent
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GLint opaque = 0;
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[context setValues:&opaque forParameter:NSOpenGLCPSurfaceOpacity];
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SurfaceCaps caps = SurfaceCaps::ForRGBA();
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ContextProfile profile = ContextProfile::OpenGLCompatibility;
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RefPtr<GLContextCGL> glContext = new GLContextCGL(CreateContextFlags::NONE, caps,
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context, false, profile);
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if (!glContext->Init()) {
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glContext = nullptr;
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[context release];
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return nullptr;
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}
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return glContext.forget();
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}
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static already_AddRefed<GLContextCGL>
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CreateOffscreenFBOContext(CreateContextFlags flags)
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{
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if (!sCGLLibrary.EnsureInitialized()) {
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return nullptr;
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}
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ContextProfile profile;
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NSOpenGLContext* context = nullptr;
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if (!(flags & CreateContextFlags::REQUIRE_COMPAT_PROFILE)) {
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profile = ContextProfile::OpenGLCore;
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context = CreateWithFormat(kAttribs_offscreen_coreProfile);
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}
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if (!context) {
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profile = ContextProfile::OpenGLCompatibility;
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if (flags & CreateContextFlags::ALLOW_OFFLINE_RENDERER) {
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if (gfxPrefs::RequireHardwareGL())
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context = CreateWithFormat(kAttribs_singleBuffered);
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else
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context = CreateWithFormat(kAttribs_offscreen_allow_offline);
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} else {
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if (gfxPrefs::RequireHardwareGL())
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context = CreateWithFormat(kAttribs_offscreen_accel);
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else
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context = CreateWithFormat(kAttribs_offscreen);
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}
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}
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if (!context) {
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NS_WARNING("Failed to create NSOpenGLContext.");
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return nullptr;
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}
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SurfaceCaps dummyCaps = SurfaceCaps::Any();
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RefPtr<GLContextCGL> glContext = new GLContextCGL(flags, dummyCaps, context, true,
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profile);
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if (gfxPrefs::GLMultithreaded()) {
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CGLEnable(glContext->GetCGLContext(), kCGLCEMPEngine);
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}
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return glContext.forget();
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}
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already_AddRefed<GLContext>
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GLContextProviderCGL::CreateHeadless(CreateContextFlags flags,
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nsACString* const out_failureId)
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{
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RefPtr<GLContextCGL> gl;
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gl = CreateOffscreenFBOContext(flags);
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if (!gl) {
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*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_CGL_FBO");
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return nullptr;
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}
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if (!gl->Init()) {
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*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_CGL_INIT");
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NS_WARNING("Failed during Init.");
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return nullptr;
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}
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return gl.forget();
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}
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already_AddRefed<GLContext>
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GLContextProviderCGL::CreateOffscreen(const IntSize& size,
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const SurfaceCaps& minCaps,
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CreateContextFlags flags,
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nsACString* const out_failureId)
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{
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RefPtr<GLContext> gl = CreateHeadless(flags, out_failureId);
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if (!gl) {
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return nullptr;
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}
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if (!gl->InitOffscreen(size, minCaps)) {
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*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_CGL_INIT");
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return nullptr;
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}
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return gl.forget();
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}
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static RefPtr<GLContext> gGlobalContext;
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GLContext*
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GLContextProviderCGL::GetGlobalContext()
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{
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static bool triedToCreateContext = false;
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if (!triedToCreateContext) {
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triedToCreateContext = true;
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MOZ_RELEASE_ASSERT(!gGlobalContext);
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nsCString discardFailureId;
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RefPtr<GLContext> temp = CreateHeadless(CreateContextFlags::NONE,
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&discardFailureId);
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gGlobalContext = temp;
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if (!gGlobalContext) {
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NS_WARNING("Couldn't init gGlobalContext.");
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}
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}
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return gGlobalContext;
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}
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void
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GLContextProviderCGL::Shutdown()
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{
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gGlobalContext = nullptr;
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}
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} /* namespace gl */
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} /* namespace mozilla */
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