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gecko-dev/gfx/gl/GLContextProviderEGL.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
#if defined(MOZ_WIDGET_GTK)
#include <gdk/gdkx.h>
// we're using default display for now
#define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) ((EGLNativeWindowType)GDK_WINDOW_XID((GdkWindow*)aWidget->GetNativeData(NS_NATIVE_WINDOW)))
#define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) ((EGLNativeWindowType)GDK_WINDOW_XID((GdkWindow*)aWidget->RealWidget()->GetNativeData(NS_NATIVE_WINDOW)))
#elif defined(MOZ_WIDGET_ANDROID)
#define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) ((EGLNativeWindowType)aWidget->GetNativeData(NS_JAVA_SURFACE))
#define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) (aWidget->AsAndroid()->GetEGLNativeWindow())
#elif defined(XP_WIN)
#define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_WINDOW))
#define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) ((EGLNativeWindowType)aWidget->AsWindows()->GetHwnd())
#else
#define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_WINDOW))
#define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) ((EGLNativeWindowType)aWidget->RealWidget()->GetNativeData(NS_NATIVE_WINDOW))
#endif
#if defined(XP_UNIX)
#ifdef MOZ_WIDGET_ANDROID
#include <android/native_window.h>
#include <android/native_window_jni.h>
#include "mozilla/widget/AndroidCompositorWidget.h"
#endif
#define GLES2_LIB "libGLESv2.so"
#define GLES2_LIB2 "libGLESv2.so.2"
#elif defined(XP_WIN)
#include "mozilla/widget/WinCompositorWidget.h"
#include "nsIFile.h"
#define GLES2_LIB "libGLESv2.dll"
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
#else
#error "Platform not recognized"
#endif
#include "gfxASurface.h"
#include "gfxCrashReporterUtils.h"
#include "gfxFailure.h"
#include "gfxPlatform.h"
#include "gfxUtils.h"
#include "GLBlitHelper.h"
#include "GLContextEGL.h"
#include "GLContextProvider.h"
#include "GLLibraryEGL.h"
#include "LayersLogging.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Preferences.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/layers/CompositorOptions.h"
#include "mozilla/widget/CompositorWidget.h"
#include "nsDebug.h"
#include "nsIWidget.h"
#include "nsThreadUtils.h"
#include "ScopedGLHelpers.h"
#include "TextureImageEGL.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace gl {
using namespace mozilla::widget;
#define ADD_ATTR_2(_array, _k, _v) do { \
(_array).AppendElement(_k); \
(_array).AppendElement(_v); \
} while (0)
#define ADD_ATTR_1(_array, _k) do { \
(_array).AppendElement(_k); \
} while (0)
static bool
CreateConfig(EGLConfig* aConfig, bool aEnableDepthBuffer);
static bool
CreateConfig(EGLConfig* aConfig, int32_t depth, bool aEnableDepthBuffer);
// append three zeros at the end of attribs list to work around
// EGL implementation bugs that iterate until they find 0, instead of
// EGL_NONE. See bug 948406.
#define EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS \
LOCAL_EGL_NONE, 0, 0, 0
static EGLint kTerminationAttribs[] = {
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static int
next_power_of_two(int v)
{
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v++;
return v;
}
static bool
is_power_of_two(int v)
{
NS_ASSERTION(v >= 0, "bad value");
if (v == 0)
return true;
return (v & (v-1)) == 0;
}
static void
DestroySurface(EGLSurface oldSurface) {
if (oldSurface != EGL_NO_SURFACE) {
sEGLLibrary.fMakeCurrent(EGL_DISPLAY(),
EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT);
sEGLLibrary.fDestroySurface(EGL_DISPLAY(), oldSurface);
}
}
static EGLSurface
CreateSurfaceFromNativeWindow(EGLNativeWindowType window, const EGLConfig& config) {
EGLSurface newSurface = nullptr;
MOZ_ASSERT(window);
#ifdef MOZ_WIDGET_ANDROID
JNIEnv* const env = jni::GetEnvForThread();
ANativeWindow* const nativeWindow = ANativeWindow_fromSurface(
env, reinterpret_cast<jobject>(window));
newSurface = sEGLLibrary.fCreateWindowSurface(
sEGLLibrary.fGetDisplay(EGL_DEFAULT_DISPLAY),
config, nativeWindow, 0);
ANativeWindow_release(nativeWindow);
#else
newSurface = sEGLLibrary.fCreateWindowSurface(EGL_DISPLAY(), config,
window, 0);
#endif
return newSurface;
}
/* GLContextEGLFactory class was added as a friend of GLContextEGL
* so that it could access GLContextEGL::CreateGLContext. This was
* done so that a new function would not need to be added to the shared
* GLContextProvider interface.
*/
class GLContextEGLFactory {
public:
static already_AddRefed<GLContext> Create(EGLNativeWindowType aWindow,
bool aWebRender);
private:
GLContextEGLFactory(){}
~GLContextEGLFactory(){}
};
already_AddRefed<GLContext>
GLContextEGLFactory::Create(EGLNativeWindowType aWindow,
bool aWebRender)
{
MOZ_ASSERT(aWindow);
nsCString discardFailureId;
if (!sEGLLibrary.EnsureInitialized(false, &discardFailureId)) {
gfxCriticalNote << "Failed to load EGL library 3!";
return nullptr;
}
bool doubleBuffered = true;
EGLConfig config;
if (aWebRender && sEGLLibrary.IsANGLE()) {
// Force enable alpha channel to make sure ANGLE use correct framebuffer formart
const int bpp = 32;
const bool withDepth = true;
if (!CreateConfig(&config, bpp, withDepth)) {
gfxCriticalNote << "Failed to create EGLConfig for WebRender ANGLE!";
return nullptr;
}
} else {
if (!CreateConfig(&config, aWebRender)) {
gfxCriticalNote << "Failed to create EGLConfig!";
return nullptr;
}
}
EGLSurface surface = mozilla::gl::CreateSurfaceFromNativeWindow(aWindow, config);
if (!surface) {
gfxCriticalNote << "Failed to create EGLSurface!";
return nullptr;
}
CreateContextFlags flags = CreateContextFlags::NONE;
if (aWebRender) {
flags |= CreateContextFlags::PREFER_ES3;
}
SurfaceCaps caps = SurfaceCaps::Any();
RefPtr<GLContextEGL> gl = GLContextEGL::CreateGLContext(flags, caps, false, config,
surface, &discardFailureId);
if (!gl) {
gfxCriticalNote << "Failed to create EGLContext!";
mozilla::gl::DestroySurface(surface);
return nullptr;
}
gl->MakeCurrent();
gl->SetIsDoubleBuffered(doubleBuffered);
return gl.forget();
}
GLContextEGL::GLContextEGL(CreateContextFlags flags, const SurfaceCaps& caps,
bool isOffscreen, EGLConfig config, EGLSurface surface,
EGLContext context)
: GLContext(flags, caps, nullptr, isOffscreen, sEGLLibrary.IsANGLE())
, mConfig(config)
, mSurface(surface)
, mContext(context)
, mSurfaceOverride(EGL_NO_SURFACE)
, mThebesSurface(nullptr)
, mBound(false)
, mIsPBuffer(false)
, mIsDoubleBuffered(false)
, mCanBindToTexture(false)
, mShareWithEGLImage(false)
, mOwnsContext(true)
{
#ifdef DEBUG
printf_stderr("Initializing context %p surface %p on display %p\n", mContext, mSurface, EGL_DISPLAY());
#endif
}
GLContextEGL::~GLContextEGL()
{
MarkDestroyed();
// Wrapped context should not destroy eglContext/Surface
if (!mOwnsContext) {
return;
}
#ifdef DEBUG
printf_stderr("Destroying context %p surface %p on display %p\n", mContext, mSurface, EGL_DISPLAY());
#endif
sEGLLibrary.fDestroyContext(EGL_DISPLAY(), mContext);
mozilla::gl::DestroySurface(mSurface);
}
bool
GLContextEGL::Init()
{
#if defined(ANDROID)
// We can't use LoadApitraceLibrary here because the GLContext
// expects its own handle to the GL library
if (!OpenLibrary(APITRACE_LIB))
#endif
if (!OpenLibrary(GLES2_LIB)) {
#if defined(XP_UNIX)
if (!OpenLibrary(GLES2_LIB2)) {
NS_WARNING("Couldn't load GLES2 LIB.");
return false;
}
#endif
}
SetupLookupFunction();
if (!InitWithPrefix("gl", true))
return false;
bool current = MakeCurrent();
if (!current) {
gfx::LogFailure(NS_LITERAL_CSTRING(
"Couldn't get device attachments for device."));
return false;
}
static_assert(sizeof(GLint) >= sizeof(int32_t), "GLint is smaller than int32_t");
mMaxTextureImageSize = INT32_MAX;
mShareWithEGLImage = sEGLLibrary.HasKHRImageBase() &&
sEGLLibrary.HasKHRImageTexture2D() &&
IsExtensionSupported(OES_EGL_image);
return true;
}
bool
GLContextEGL::BindTexImage()
{
if (!mSurface)
return false;
if (mBound && !ReleaseTexImage())
return false;
EGLBoolean success = sEGLLibrary.fBindTexImage(EGL_DISPLAY(),
(EGLSurface)mSurface, LOCAL_EGL_BACK_BUFFER);
if (success == LOCAL_EGL_FALSE)
return false;
mBound = true;
return true;
}
bool
GLContextEGL::ReleaseTexImage()
{
if (!mBound)
return true;
if (!mSurface)
return false;
EGLBoolean success;
success = sEGLLibrary.fReleaseTexImage(EGL_DISPLAY(),
(EGLSurface)mSurface,
LOCAL_EGL_BACK_BUFFER);
if (success == LOCAL_EGL_FALSE)
return false;
mBound = false;
return true;
}
void
GLContextEGL::SetEGLSurfaceOverride(EGLSurface surf) {
if (Screen()) {
/* Blit `draw` to `read` if we need to, before we potentially juggle
* `read` around. If we don't, we might attach a different `read`,
* and *then* hit AssureBlitted, which will blit a dirty `draw` onto
* the wrong `read`!
*/
Screen()->AssureBlitted();
}
mSurfaceOverride = surf;
DebugOnly<bool> ok = MakeCurrent(true);
MOZ_ASSERT(ok);
}
bool
GLContextEGL::MakeCurrentImpl(bool aForce) {
bool succeeded = true;
// Assume that EGL has the same problem as WGL does,
// where MakeCurrent with an already-current context is
// still expensive.
bool needsMakeCurrent = (aForce || sEGLLibrary.fGetCurrentContext() != mContext);
if (needsMakeCurrent) {
EGLSurface surface = mSurfaceOverride != EGL_NO_SURFACE
? mSurfaceOverride
: mSurface;
if (surface == EGL_NO_SURFACE) {
return false;
}
succeeded = sEGLLibrary.fMakeCurrent(EGL_DISPLAY(),
surface, surface,
mContext);
if (!succeeded) {
int eglError = sEGLLibrary.fGetError();
if (eglError == LOCAL_EGL_CONTEXT_LOST) {
mContextLost = true;
NS_WARNING("EGL context has been lost.");
} else {
NS_WARNING("Failed to make GL context current!");
#ifdef DEBUG
printf_stderr("EGL Error: 0x%04x\n", eglError);
#endif
}
}
}
return succeeded;
}
bool
GLContextEGL::IsCurrent() {
return sEGLLibrary.fGetCurrentContext() == mContext;
}
bool
GLContextEGL::RenewSurface(CompositorWidget* aWidget) {
if (!mOwnsContext) {
return false;
}
// unconditionally release the surface and create a new one. Don't try to optimize this away.
// If we get here, then by definition we know that we want to get a new surface.
ReleaseSurface();
MOZ_ASSERT(aWidget);
mSurface = mozilla::gl::CreateSurfaceFromNativeWindow(GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget), mConfig);
if (!mSurface) {
return false;
}
return MakeCurrent(true);
}
void
GLContextEGL::ReleaseSurface() {
if (mOwnsContext) {
mozilla::gl::DestroySurface(mSurface);
}
if (mSurface == mSurfaceOverride) {
mSurfaceOverride = EGL_NO_SURFACE;
}
mSurface = EGL_NO_SURFACE;
}
bool
GLContextEGL::SetupLookupFunction()
{
mLookupFunc = sEGLLibrary.GetLookupFunction();
return true;
}
bool
GLContextEGL::SwapBuffers()
{
EGLSurface surface = mSurfaceOverride != EGL_NO_SURFACE
? mSurfaceOverride
: mSurface;
if (surface) {
return sEGLLibrary.fSwapBuffers(EGL_DISPLAY(), surface);
} else {
return false;
}
}
void
GLContextEGL::GetWSIInfo(nsCString* const out) const
{
out->AppendLiteral("EGL_VENDOR: ");
out->Append((const char*)sEGLLibrary.fQueryString(EGL_DISPLAY(), LOCAL_EGL_VENDOR));
out->AppendLiteral("\nEGL_VERSION: ");
out->Append((const char*)sEGLLibrary.fQueryString(EGL_DISPLAY(), LOCAL_EGL_VERSION));
out->AppendLiteral("\nEGL_EXTENSIONS: ");
out->Append((const char*)sEGLLibrary.fQueryString(EGL_DISPLAY(), LOCAL_EGL_EXTENSIONS));
#ifndef ANDROID // This query will crash some old android.
out->AppendLiteral("\nEGL_EXTENSIONS(nullptr): ");
out->Append((const char*)sEGLLibrary.fQueryString(nullptr, LOCAL_EGL_EXTENSIONS));
#endif
}
// hold a reference to the given surface
// for the lifetime of this context.
void
GLContextEGL::HoldSurface(gfxASurface* aSurf) {
mThebesSurface = aSurf;
}
already_AddRefed<GLContextEGL>
GLContextEGL::CreateGLContext(CreateContextFlags flags,
const SurfaceCaps& caps,
bool isOffscreen,
EGLConfig config,
EGLSurface surface,
nsACString* const out_failureId)
{
if (sEGLLibrary.fBindAPI(LOCAL_EGL_OPENGL_ES_API) == LOCAL_EGL_FALSE) {
*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_ES");
NS_WARNING("Failed to bind API to GLES!");
return nullptr;
}
std::vector<EGLint> required_attribs;
required_attribs.push_back(LOCAL_EGL_CONTEXT_CLIENT_VERSION);
if (flags & CreateContextFlags::PREFER_ES3) {
required_attribs.push_back(3);
} else {
required_attribs.push_back(2);
}
std::vector<EGLint> robustness_attribs;
std::vector<EGLint> rbab_attribs; // RBAB: Robust Buffer Access Behavior
if (flags & CreateContextFlags::PREFER_ROBUSTNESS) {
if (sEGLLibrary.IsExtensionSupported(GLLibraryEGL::EXT_create_context_robustness)) {
robustness_attribs = required_attribs;
robustness_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT);
robustness_attribs.push_back(LOCAL_EGL_LOSE_CONTEXT_ON_RESET_EXT);
// Skip EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT, since it doesn't help us.
}
if (sEGLLibrary.IsExtensionSupported(GLLibraryEGL::KHR_create_context) &&
!sEGLLibrary.IsANGLE())
{
rbab_attribs = required_attribs;
rbab_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR);
rbab_attribs.push_back(LOCAL_EGL_LOSE_CONTEXT_ON_RESET_KHR);
rbab_attribs.push_back(LOCAL_EGL_CONTEXT_FLAGS_KHR);
rbab_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR);
}
}
const auto fnCreate = [&](const std::vector<EGLint>& attribs) {
auto terminated_attribs = attribs;
for (const auto& cur : kTerminationAttribs) {
terminated_attribs.push_back(cur);
}
return sEGLLibrary.fCreateContext(EGL_DISPLAY(), config, EGL_NO_CONTEXT,
terminated_attribs.data());
};
EGLContext context;
do {
if (!rbab_attribs.empty()) {
context = fnCreate(rbab_attribs);
if (context)
break;
NS_WARNING("Failed to create EGLContext with rbab_attribs");
}
if (!robustness_attribs.empty()) {
context = fnCreate(robustness_attribs);
if (context)
break;
NS_WARNING("Failed to create EGLContext with robustness_attribs");
}
context = fnCreate(required_attribs);
if (context)
break;
NS_WARNING("Failed to create EGLContext with required_attribs");
*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_CREATE");
return nullptr;
} while (false);
MOZ_ASSERT(context);
RefPtr<GLContextEGL> glContext = new GLContextEGL(flags, caps, isOffscreen, config,
surface, context);
if (!glContext->Init()) {
*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_INIT");
return nullptr;
}
return glContext.forget();
}
EGLSurface
GLContextEGL::CreatePBufferSurfaceTryingPowerOfTwo(EGLConfig config,
EGLenum bindToTextureFormat,
mozilla::gfx::IntSize& pbsize)
{
nsTArray<EGLint> pbattrs(16);
EGLSurface surface = nullptr;
TRY_AGAIN_POWER_OF_TWO:
pbattrs.Clear();
pbattrs.AppendElement(LOCAL_EGL_WIDTH); pbattrs.AppendElement(pbsize.width);
pbattrs.AppendElement(LOCAL_EGL_HEIGHT); pbattrs.AppendElement(pbsize.height);
if (bindToTextureFormat != LOCAL_EGL_NONE) {
pbattrs.AppendElement(LOCAL_EGL_TEXTURE_TARGET);
pbattrs.AppendElement(LOCAL_EGL_TEXTURE_2D);
pbattrs.AppendElement(LOCAL_EGL_TEXTURE_FORMAT);
pbattrs.AppendElement(bindToTextureFormat);
}
for (const auto& cur : kTerminationAttribs) {
pbattrs.AppendElement(cur);
}
surface = sEGLLibrary.fCreatePbufferSurface(EGL_DISPLAY(), config, &pbattrs[0]);
if (!surface) {
if (!is_power_of_two(pbsize.width) ||
!is_power_of_two(pbsize.height))
{
if (!is_power_of_two(pbsize.width))
pbsize.width = next_power_of_two(pbsize.width);
if (!is_power_of_two(pbsize.height))
pbsize.height = next_power_of_two(pbsize.height);
NS_WARNING("Failed to create pbuffer, trying power of two dims");
goto TRY_AGAIN_POWER_OF_TWO;
}
NS_WARNING("Failed to create pbuffer surface");
return nullptr;
}
return surface;
}
static const EGLint kEGLConfigAttribsOffscreenPBuffer[] = {
LOCAL_EGL_SURFACE_TYPE, LOCAL_EGL_PBUFFER_BIT,
LOCAL_EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT,
// Old versions of llvmpipe seem to need this to properly create the pbuffer (bug 981856)
LOCAL_EGL_RED_SIZE, 8,
LOCAL_EGL_GREEN_SIZE, 8,
LOCAL_EGL_BLUE_SIZE, 8,
LOCAL_EGL_ALPHA_SIZE, 0,
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static const EGLint kEGLConfigAttribsRGB16[] = {
LOCAL_EGL_SURFACE_TYPE, LOCAL_EGL_WINDOW_BIT,
LOCAL_EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT,
LOCAL_EGL_RED_SIZE, 5,
LOCAL_EGL_GREEN_SIZE, 6,
LOCAL_EGL_BLUE_SIZE, 5,
LOCAL_EGL_ALPHA_SIZE, 0,
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static const EGLint kEGLConfigAttribsRGB24[] = {
LOCAL_EGL_SURFACE_TYPE, LOCAL_EGL_WINDOW_BIT,
LOCAL_EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT,
LOCAL_EGL_RED_SIZE, 8,
LOCAL_EGL_GREEN_SIZE, 8,
LOCAL_EGL_BLUE_SIZE, 8,
LOCAL_EGL_ALPHA_SIZE, 0,
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static const EGLint kEGLConfigAttribsRGBA32[] = {
LOCAL_EGL_SURFACE_TYPE, LOCAL_EGL_WINDOW_BIT,
LOCAL_EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT,
LOCAL_EGL_RED_SIZE, 8,
LOCAL_EGL_GREEN_SIZE, 8,
LOCAL_EGL_BLUE_SIZE, 8,
LOCAL_EGL_ALPHA_SIZE, 8,
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static bool
CreateConfig(EGLConfig* aConfig, int32_t depth, bool aEnableDepthBuffer)
{
EGLConfig configs[64];
const EGLint* attribs;
EGLint ncfg = ArrayLength(configs);
switch (depth) {
case 16:
attribs = kEGLConfigAttribsRGB16;
break;
case 24:
attribs = kEGLConfigAttribsRGB24;
break;
case 32:
attribs = kEGLConfigAttribsRGBA32;
break;
default:
NS_ERROR("Unknown pixel depth");
return false;
}
if (!sEGLLibrary.fChooseConfig(EGL_DISPLAY(), attribs,
configs, ncfg, &ncfg) ||
ncfg < 1) {
return false;
}
for (int j = 0; j < ncfg; ++j) {
EGLConfig config = configs[j];
EGLint r, g, b, a;
if (sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), config,
LOCAL_EGL_RED_SIZE, &r) &&
sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), config,
LOCAL_EGL_GREEN_SIZE, &g) &&
sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), config,
LOCAL_EGL_BLUE_SIZE, &b) &&
sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), config,
LOCAL_EGL_ALPHA_SIZE, &a) &&
((depth == 16 && r == 5 && g == 6 && b == 5) ||
(depth == 24 && r == 8 && g == 8 && b == 8) ||
(depth == 32 && r == 8 && g == 8 && b == 8 && a == 8)))
{
EGLint z;
if (aEnableDepthBuffer) {
if (!sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), config, LOCAL_EGL_DEPTH_SIZE, &z) ||
z != 24) {
continue;
}
}
*aConfig = config;
return true;
}
}
return false;
}
// Return true if a suitable EGLConfig was found and pass it out
// through aConfig. Return false otherwise.
//
// NB: It's entirely legal for the returned EGLConfig to be valid yet
// have the value null.
static bool
CreateConfig(EGLConfig* aConfig, bool aEnableDepthBuffer)
{
int32_t depth = gfxVars::ScreenDepth();
if (!CreateConfig(aConfig, depth, aEnableDepthBuffer)) {
#ifdef MOZ_WIDGET_ANDROID
// Bug 736005
// Android doesn't always support 16 bit so also try 24 bit
if (depth == 16) {
return CreateConfig(aConfig, 24, aEnableDepthBuffer);
}
// Bug 970096
// Some devices that have 24 bit screens only support 16 bit OpenGL?
if (depth == 24) {
return CreateConfig(aConfig, 16, aEnableDepthBuffer);
}
#endif
return false;
} else {
return true;
}
}
already_AddRefed<GLContext>
GLContextProviderEGL::CreateWrappingExisting(void* aContext, void* aSurface)
{
nsCString discardFailureId;
if (!sEGLLibrary.EnsureInitialized(false, &discardFailureId)) {
MOZ_CRASH("GFX: Failed to load EGL library 2!");
return nullptr;
}
if (!aContext || !aSurface)
return nullptr;
SurfaceCaps caps = SurfaceCaps::Any();
EGLConfig config = EGL_NO_CONFIG;
RefPtr<GLContextEGL> gl = new GLContextEGL(CreateContextFlags::NONE, caps, false,
config, (EGLSurface)aSurface,
(EGLContext)aContext);
gl->SetIsDoubleBuffered(true);
gl->mOwnsContext = false;
return gl.forget();
}
already_AddRefed<GLContext>
GLContextProviderEGL::CreateForCompositorWidget(CompositorWidget* aCompositorWidget, bool aForceAccelerated)
{
MOZ_ASSERT(aCompositorWidget);
return GLContextEGLFactory::Create(GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aCompositorWidget),
aCompositorWidget->GetCompositorOptions().UseWebRender());
}
already_AddRefed<GLContext>
GLContextProviderEGL::CreateForWindow(nsIWidget* aWidget,
bool aWebRender,
bool aForceAccelerated)
{
MOZ_ASSERT(aWidget);
return GLContextEGLFactory::Create(GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget),
aWebRender);
}
#if defined(MOZ_WIDGET_ANDROID)
EGLSurface
GLContextEGL::CreateCompatibleSurface(void* aWindow)
{
if (mConfig == EGL_NO_CONFIG) {
MOZ_CRASH("GFX: Failed with invalid EGLConfig 2!");
}
return GLContextProviderEGL::CreateEGLSurface(aWindow, mConfig);
}
/* static */ EGLSurface
GLContextProviderEGL::CreateEGLSurface(void* aWindow, EGLConfig aConfig)
{
// NOTE: aWindow is an ANativeWindow
nsCString discardFailureId;
if (!sEGLLibrary.EnsureInitialized(false, &discardFailureId)) {
MOZ_CRASH("GFX: Failed to load EGL library 4!");
}
EGLConfig config = aConfig;
if (!config && !CreateConfig(&config, /* aEnableDepthBuffer */ false)) {
MOZ_CRASH("GFX: Failed to create EGLConfig 2!");
}
MOZ_ASSERT(aWindow);
EGLSurface surface = sEGLLibrary.fCreateWindowSurface(EGL_DISPLAY(), config, aWindow,
0);
if (surface == EGL_NO_SURFACE) {
MOZ_CRASH("GFX: Failed to create EGLSurface 2!");
}
return surface;
}
/* static */ void
GLContextProviderEGL::DestroyEGLSurface(EGLSurface surface)
{
nsCString discardFailureId;
if (!sEGLLibrary.EnsureInitialized(false, &discardFailureId)) {
MOZ_CRASH("GFX: Failed to load EGL library 5!");
}
sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
}
#endif // defined(ANDROID)
static void
FillContextAttribs(bool alpha, bool depth, bool stencil, bool bpp16,
bool es3, nsTArray<EGLint>* out)
{
out->AppendElement(LOCAL_EGL_SURFACE_TYPE);
out->AppendElement(LOCAL_EGL_PBUFFER_BIT);
out->AppendElement(LOCAL_EGL_RENDERABLE_TYPE);
if (es3) {
out->AppendElement(LOCAL_EGL_OPENGL_ES3_BIT_KHR);
} else {
out->AppendElement(LOCAL_EGL_OPENGL_ES2_BIT);
}
out->AppendElement(LOCAL_EGL_RED_SIZE);
if (bpp16) {
out->AppendElement(alpha ? 4 : 5);
} else {
out->AppendElement(8);
}
out->AppendElement(LOCAL_EGL_GREEN_SIZE);
if (bpp16) {
out->AppendElement(alpha ? 4 : 6);
} else {
out->AppendElement(8);
}
out->AppendElement(LOCAL_EGL_BLUE_SIZE);
if (bpp16) {
out->AppendElement(alpha ? 4 : 5);
} else {
out->AppendElement(8);
}
out->AppendElement(LOCAL_EGL_ALPHA_SIZE);
if (alpha) {
out->AppendElement(bpp16 ? 4 : 8);
} else {
out->AppendElement(0);
}
out->AppendElement(LOCAL_EGL_DEPTH_SIZE);
out->AppendElement(depth ? 16 : 0);
out->AppendElement(LOCAL_EGL_STENCIL_SIZE);
out->AppendElement(stencil ? 8 : 0);
// EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
out->AppendElement(LOCAL_EGL_NONE);
out->AppendElement(0);
out->AppendElement(0);
out->AppendElement(0);
}
static GLint
GetAttrib(GLLibraryEGL* egl, EGLConfig config, EGLint attrib)
{
EGLint bits = 0;
egl->fGetConfigAttrib(egl->Display(), config, attrib, &bits);
MOZ_ASSERT(egl->fGetError() == LOCAL_EGL_SUCCESS);
return bits;
}
static EGLConfig
ChooseConfig(GLLibraryEGL* egl, CreateContextFlags flags, const SurfaceCaps& minCaps,
SurfaceCaps* const out_configCaps)
{
nsTArray<EGLint> configAttribList;
FillContextAttribs(minCaps.alpha, minCaps.depth, minCaps.stencil, minCaps.bpp16,
bool(flags & CreateContextFlags::PREFER_ES3), &configAttribList);
const EGLint* configAttribs = configAttribList.Elements();
// We're guaranteed to get at least minCaps, and the sorting dictated by the spec for
// eglChooseConfig reasonably assures that a reasonable 'best' config is on top.
const EGLint kMaxConfigs = 1;
EGLConfig configs[kMaxConfigs];
EGLint foundConfigs = 0;
if (!egl->fChooseConfig(egl->Display(), configAttribs, configs, kMaxConfigs,
&foundConfigs)
|| foundConfigs == 0)
{
return EGL_NO_CONFIG;
}
EGLConfig config = configs[0];
*out_configCaps = minCaps; // Pick up any preserve, etc.
out_configCaps->color = true;
out_configCaps->alpha = bool(GetAttrib(egl, config, LOCAL_EGL_ALPHA_SIZE));
out_configCaps->depth = bool(GetAttrib(egl, config, LOCAL_EGL_DEPTH_SIZE));
out_configCaps->stencil = bool(GetAttrib(egl, config, LOCAL_EGL_STENCIL_SIZE));
out_configCaps->bpp16 = (GetAttrib(egl, config, LOCAL_EGL_RED_SIZE) < 8);
return config;
}
/*static*/ already_AddRefed<GLContextEGL>
GLContextEGL::CreateEGLPBufferOffscreenContext(CreateContextFlags flags,
const mozilla::gfx::IntSize& size,
const SurfaceCaps& minCaps,
nsACString* const out_failureId)
{
bool forceEnableHardware = bool(flags & CreateContextFlags::FORCE_ENABLE_HARDWARE);
if (!sEGLLibrary.EnsureInitialized(forceEnableHardware, out_failureId)) {
return nullptr;
}
SurfaceCaps configCaps;
EGLConfig config = ChooseConfig(&sEGLLibrary, flags, minCaps, &configCaps);
if (config == EGL_NO_CONFIG) {
*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_NO_CONFIG");
NS_WARNING("Failed to find a compatible config.");
return nullptr;
}
if (GLContext::ShouldSpew()) {
sEGLLibrary.DumpEGLConfig(config);
}
mozilla::gfx::IntSize pbSize(size);
EGLSurface surface = GLContextEGL::CreatePBufferSurfaceTryingPowerOfTwo(config,
LOCAL_EGL_NONE,
pbSize);
if (!surface) {
*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_POT");
NS_WARNING("Failed to create PBuffer for context!");
return nullptr;
}
RefPtr<GLContextEGL> gl = GLContextEGL::CreateGLContext(flags, configCaps, true,
config, surface,
out_failureId);
if (!gl) {
NS_WARNING("Failed to create GLContext from PBuffer");
sEGLLibrary.fDestroySurface(sEGLLibrary.Display(), surface);
return nullptr;
}
return gl.forget();
}
/*static*/ already_AddRefed<GLContext>
GLContextProviderEGL::CreateHeadless(CreateContextFlags flags,
nsACString* const out_failureId)
{
mozilla::gfx::IntSize dummySize = mozilla::gfx::IntSize(16, 16);
SurfaceCaps dummyCaps = SurfaceCaps::Any();
return GLContextEGL::CreateEGLPBufferOffscreenContext(flags, dummySize, dummyCaps,
out_failureId);
}
// Under EGL, on Android, pbuffers are supported fine, though
// often without the ability to texture from them directly.
/*static*/ already_AddRefed<GLContext>
GLContextProviderEGL::CreateOffscreen(const mozilla::gfx::IntSize& size,
const SurfaceCaps& minCaps,
CreateContextFlags flags,
nsACString* const out_failureId)
{
bool forceEnableHardware = bool(flags & CreateContextFlags::FORCE_ENABLE_HARDWARE);
if (!sEGLLibrary.EnsureInitialized(forceEnableHardware, out_failureId)) { // Needed for IsANGLE().
return nullptr;
}
bool canOffscreenUseHeadless = true;
if (sEGLLibrary.IsANGLE()) {
// ANGLE needs to use PBuffers.
canOffscreenUseHeadless = false;
}
#if defined(MOZ_WIDGET_ANDROID)
// Using a headless context loses the SurfaceCaps
// which can cause a loss of depth and/or stencil
canOffscreenUseHeadless = false;
#endif // defined(MOZ_WIDGET_ANDROID)
RefPtr<GLContext> gl;
SurfaceCaps minOffscreenCaps = minCaps;
if (canOffscreenUseHeadless) {
gl = CreateHeadless(flags, out_failureId);
if (!gl) {
return nullptr;
}
} else {
SurfaceCaps minBackbufferCaps = minOffscreenCaps;
if (minOffscreenCaps.antialias) {
minBackbufferCaps.antialias = false;
minBackbufferCaps.depth = false;
minBackbufferCaps.stencil = false;
}
gl = GLContextEGL::CreateEGLPBufferOffscreenContext(flags, size,
minBackbufferCaps,
out_failureId);
if (!gl)
return nullptr;
// Pull the actual resulting caps to ensure that our offscreen matches our
// backbuffer.
minOffscreenCaps.alpha = gl->Caps().alpha;
if (!minOffscreenCaps.antialias) {
// Only update these if we don't have AA. If we do have AA, we ignore
// backbuffer depth/stencil.
minOffscreenCaps.depth = gl->Caps().depth;
minOffscreenCaps.stencil = gl->Caps().stencil;
}
}
// Init the offscreen with the updated offscreen caps.
if (!gl->InitOffscreen(size, minOffscreenCaps)) {
*out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_OFFSCREEN");
return nullptr;
}
return gl.forget();
}
// Don't want a global context on Android as 1) share groups across 2 threads fail on many Tegra drivers (bug 759225)
// and 2) some mobile devices have a very strict limit on global number of GL contexts (bug 754257)
// and 3) each EGL context eats 750k on B2G (bug 813783)
/*static*/ GLContext*
GLContextProviderEGL::GetGlobalContext()
{
return nullptr;
}
/*static*/ void
GLContextProviderEGL::Shutdown()
{
}
} /* namespace gl */
} /* namespace mozilla */
#undef EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
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