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gecko/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(aWidget) ((EGLNativeWindowType)GDK_WINDOW_XID((GdkWindow*)aWidget->GetNativeData(NS_NATIVE_WINDOW)))
#elif defined(MOZ_WIDGET_QT)
#define GET_NATIVE_WINDOW(aWidget) ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_SHAREABLE_WINDOW))
#else
#define GET_NATIVE_WINDOW(aWidget) ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_WINDOW))
#endif
#if defined(XP_UNIX)
#ifdef MOZ_WIDGET_GONK
#include "libdisplay/GonkDisplay.h"
#include "nsWindow.h"
#include "nsScreenManagerGonk.h"
#endif
#ifdef ANDROID
/* from widget */
#ifdef MOZ_WIDGET_ANDROID
#include "AndroidBridge.h"
#endif
#include <android/log.h>
#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "Gonk" , ## args)
#ifdef MOZ_WIDGET_GONK
#include "cutils/properties.h"
#include <ui/GraphicBuffer.h>
using namespace android;
#endif
#endif
#define GLES2_LIB "libGLESv2.so"
#define GLES2_LIB2 "libGLESv2.so.2"
#elif defined(XP_WIN)
#include "nsIFile.h"
#define GLES2_LIB "libGLESv2.dll"
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
// a little helper
class AutoDestroyHWND {
public:
AutoDestroyHWND(HWND aWnd = nullptr)
: mWnd(aWnd)
{
}
~AutoDestroyHWND() {
if (mWnd) {
::DestroyWindow(mWnd);
}
}
operator HWND() {
return mWnd;
}
HWND forget() {
HWND w = mWnd;
mWnd = nullptr;
return w;
}
HWND operator=(HWND aWnd) {
if (mWnd && mWnd != aWnd) {
::DestroyWindow(mWnd);
}
mWnd = aWnd;
return mWnd;
}
HWND mWnd;
};
#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 "mozilla/ArrayUtils.h"
#include "mozilla/Preferences.h"
#include "nsDebug.h"
#include "nsIWidget.h"
#include "nsThreadUtils.h"
#include "ScopedGLHelpers.h"
#include "TextureImageEGL.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace gl {
#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, nsIWidget* aWidget);
// 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 gTerminationAttribs[] = {
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static EGLint gContextAttribs[] = {
LOCAL_EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static EGLint gContextAttribsRobustness[] = {
LOCAL_EGL_CONTEXT_CLIENT_VERSION, 2,
//LOCAL_EGL_CONTEXT_ROBUST_ACCESS_EXT, LOCAL_EGL_TRUE,
LOCAL_EGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_EXT, LOCAL_EGL_LOSE_CONTEXT_ON_RESET_EXT,
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
CreateSurfaceForWindow(nsIWidget* widget, const EGLConfig& config) {
EGLSurface newSurface = nullptr;
#ifdef MOZ_WIDGET_ANDROID
mozilla::AndroidBridge::Bridge()->RegisterCompositor();
newSurface = mozilla::AndroidBridge::Bridge()->CreateEGLSurfaceForCompositor();
#else
MOZ_ASSERT(widget != nullptr);
newSurface = sEGLLibrary.fCreateWindowSurface(EGL_DISPLAY(), config,
GET_NATIVE_WINDOW(widget), 0);
#endif
return newSurface;
}
GLContextEGL::GLContextEGL(
const SurfaceCaps& caps,
GLContext* shareContext,
bool isOffscreen,
EGLConfig config,
EGLSurface surface,
EGLContext context)
: GLContext(caps, shareContext, isOffscreen)
, mConfig(config)
, mSurface(surface)
, mContext(context)
, mSurfaceOverride(EGL_NO_SURFACE)
, mThebesSurface(nullptr)
, mBound(false)
, mIsPBuffer(false)
, mIsDoubleBuffered(false)
, mCanBindToTexture(false)
, mShareWithEGLImage(false)
, mOwnsContext(true)
{
// any EGL contexts will always be GLESv2
SetProfileVersion(ContextProfile::OpenGLES, 200);
#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);
sEGLLibrary.UnsetCachedCurrentContext();
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION < 17
if (!mIsOffscreen) {
// In ICS, SurfaceFlinger's DisplayHardware::fini() does not destroy the EGLSurface associated with the
// native framebuffer. Destroying it causes crashes in the ICS emulator
// EGL implementation, specifically because the egl_window_surface_t dtor
// calls nativeWindow->cancelBuffer and FramebufferNativeWindow does not initialize
// the cancelBuffer function pointer, see bug 986836
return;
}
#endif
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;
}
PR_STATIC_ASSERT(sizeof(GLint) >= sizeof(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 hasDifferentContext = false;
if (sEGLLibrary.CachedCurrentContext() != mContext) {
// even if the cached context doesn't match the current one
// might still
if (sEGLLibrary.fGetCurrentContext() != mContext) {
hasDifferentContext = true;
} else {
sEGLLibrary.SetCachedCurrentContext(mContext);
}
}
if (aForce || hasDifferentContext) {
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
}
} else {
sEGLLibrary.SetCachedCurrentContext(mContext);
}
} else {
MOZ_ASSERT(sEGLLibrary.CachedCurrentContextMatches());
}
return succeeded;
}
bool
GLContextEGL::IsCurrent() {
return sEGLLibrary.fGetCurrentContext() == mContext;
}
bool
GLContextEGL::RenewSurface() {
if (!mOwnsContext) {
return false;
}
#ifndef MOZ_WIDGET_ANDROID
MOZ_CRASH("unimplemented");
// to support this on non-Android platforms, need to keep track of the nsIWidget that
// this GLContext was created for (with CreateForWindow) so that we know what to
// pass again to CreateSurfaceForWindow below.
// The reason why Android doesn't need this is that it delegates EGLSurface creation to
// Java code which is the only thing that knows about our actual widget.
#endif
// 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();
mSurface = mozilla::gl::CreateSurfaceForWindow(nullptr, mConfig); // the nullptr here is where we assume Android.
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 = (PlatformLookupFunction)sEGLLibrary.mSymbols.fGetProcAddress;
return true;
}
bool
GLContextEGL::SwapBuffers()
{
EGLSurface surface = mSurfaceOverride != EGL_NO_SURFACE
? mSurfaceOverride
: mSurface;
if (surface) {
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION < 17
if (!mIsOffscreen) {
// eglSwapBuffers() is called by hwcomposer.
return true;
}
#endif
return sEGLLibrary.fSwapBuffers(EGL_DISPLAY(), surface);
} else {
return false;
}
}
// hold a reference to the given surface
// for the lifetime of this context.
void
GLContextEGL::HoldSurface(gfxASurface *aSurf) {
mThebesSurface = aSurf;
}
/* static */ EGLSurface
GLContextEGL::CreateSurfaceForWindow(nsIWidget* aWidget)
{
if (!sEGLLibrary.EnsureInitialized()) {
MOZ_CRASH("Failed to load EGL library!\n");
return nullptr;
}
EGLConfig config;
if (!CreateConfig(&config, aWidget)) {
MOZ_CRASH("Failed to create EGLConfig!\n");
return nullptr;
}
EGLSurface surface = mozilla::gl::CreateSurfaceForWindow(aWidget, config);
if (!surface) {
MOZ_CRASH("Failed to create EGLSurface for window!\n");
return nullptr;
}
return surface;
}
/* static */ void
GLContextEGL::DestroySurface(EGLSurface aSurface)
{
if (aSurface != EGL_NO_SURFACE) {
sEGLLibrary.fDestroySurface(EGL_DISPLAY(), aSurface);
}
}
already_AddRefed<GLContextEGL>
GLContextEGL::CreateGLContext(const SurfaceCaps& caps,
GLContextEGL *shareContext,
bool isOffscreen,
EGLConfig config,
EGLSurface surface)
{
if (sEGLLibrary.fBindAPI(LOCAL_EGL_OPENGL_ES_API) == LOCAL_EGL_FALSE) {
NS_WARNING("Failed to bind API to GLES!");
return nullptr;
}
EGLContext eglShareContext = shareContext ? shareContext->mContext
: EGL_NO_CONTEXT;
EGLint* attribs = sEGLLibrary.HasRobustness() ? gContextAttribsRobustness
: gContextAttribs;
EGLContext context = sEGLLibrary.fCreateContext(EGL_DISPLAY(),
config,
eglShareContext,
attribs);
if (!context && shareContext) {
shareContext = nullptr;
context = sEGLLibrary.fCreateContext(EGL_DISPLAY(),
config,
EGL_NO_CONTEXT,
attribs);
}
if (!context) {
NS_WARNING("Failed to create EGLContext!");
return nullptr;
}
nsRefPtr<GLContextEGL> glContext = new GLContextEGL(caps,
shareContext,
isOffscreen,
config,
surface,
context);
if (!glContext->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 (size_t i = 0; i < MOZ_ARRAY_LENGTH(gTerminationAttribs); i++) {
pbattrs.AppendElement(gTerminationAttribs[i]);
}
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,
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
LOCAL_EGL_FRAMEBUFFER_TARGET_ANDROID, LOCAL_EGL_TRUE,
#endif
EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
};
static bool
CreateConfig(EGLConfig* aConfig, int32_t depth, nsIWidget* aWidget)
{
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;
}
#ifdef MOZ_WIDGET_GONK
// On gonk, it's important to select a configuration with the
// the correct order as well as bits per channel.
// EGL_NATIVE_VISUAL_ID gives us the Android pixel format which
// is an enum that tells us both order and bits per channel.
// For example -
// HAL_PIXEL_FORMAT_RGBX_8888
// HAL_PIXEL_FORMAT_BGRA_8888
// HAL_PIXEL_FORMAT_RGB_565
nsWindow* window = static_cast<nsWindow*>(aWidget);
for (int j = 0; j < ncfg; ++j) {
EGLConfig config = configs[j];
EGLint format;
if (sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), config,
LOCAL_EGL_NATIVE_VISUAL_ID, &format) &&
format == window->GetScreen()->GetSurfaceFormat())
{
*aConfig = config;
return true;
}
}
#endif
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)))
{
*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, nsIWidget* aWidget)
{
int32_t depth = gfxPlatform::GetPlatform()->GetScreenDepth();
if (!CreateConfig(aConfig, depth, aWidget)) {
#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, aWidget);
}
// Bug 970096
// Some devices that have 24 bit screens only support 16 bit OpenGL?
if (depth == 24) {
return CreateConfig(aConfig, 16, aWidget);
}
#endif
return false;
} else {
return true;
}
}
already_AddRefed<GLContext>
GLContextProviderEGL::CreateWrappingExisting(void* aContext, void* aSurface)
{
if (!sEGLLibrary.EnsureInitialized()) {
MOZ_CRASH("Failed to load EGL library!\n");
return nullptr;
}
if (aContext && aSurface) {
SurfaceCaps caps = SurfaceCaps::Any();
EGLConfig config = EGL_NO_CONFIG;
nsRefPtr<GLContextEGL> glContext =
new GLContextEGL(caps,
nullptr, false,
config, (EGLSurface)aSurface, (EGLContext)aContext);
glContext->SetIsDoubleBuffered(true);
glContext->mOwnsContext = false;
return glContext.forget();
}
return nullptr;
}
already_AddRefed<GLContext>
GLContextProviderEGL::CreateForWindow(nsIWidget *aWidget)
{
if (!sEGLLibrary.EnsureInitialized()) {
MOZ_CRASH("Failed to load EGL library!\n");
return nullptr;
}
bool doubleBuffered = true;
EGLConfig config;
if (!CreateConfig(&config, aWidget)) {
MOZ_CRASH("Failed to create EGLConfig!\n");
return nullptr;
}
EGLSurface surface = mozilla::gl::CreateSurfaceForWindow(aWidget, config);
if (!surface) {
MOZ_CRASH("Failed to create EGLSurface!\n");
return nullptr;
}
SurfaceCaps caps = SurfaceCaps::Any();
nsRefPtr<GLContextEGL> glContext =
GLContextEGL::CreateGLContext(caps,
nullptr, false,
config, surface);
if (!glContext) {
MOZ_CRASH("Failed to create EGLContext!\n");
mozilla::gl::DestroySurface(surface);
return nullptr;
}
glContext->MakeCurrent();
glContext->SetIsDoubleBuffered(doubleBuffered);
return glContext.forget();
}
#if defined(ANDROID)
EGLSurface
GLContextProviderEGL::CreateEGLSurface(void* aWindow)
{
if (!sEGLLibrary.EnsureInitialized()) {
MOZ_CRASH("Failed to load EGL library!\n");
}
EGLConfig config;
if (!CreateConfig(&config, static_cast<nsIWidget*>(aWindow))) {
MOZ_CRASH("Failed to create EGLConfig!\n");
}
MOZ_ASSERT(aWindow);
EGLSurface surface = sEGLLibrary.fCreateWindowSurface(EGL_DISPLAY(), config, aWindow, 0);
if (surface == EGL_NO_SURFACE) {
MOZ_CRASH("Failed to create EGLSurface!\n");
}
return surface;
}
void
GLContextProviderEGL::DestroyEGLSurface(EGLSurface surface)
{
if (!sEGLLibrary.EnsureInitialized()) {
MOZ_CRASH("Failed to load EGL library!\n");
}
sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
}
#endif // defined(ANDROID)
static void
FillContextAttribs(bool alpha, bool depth, bool stencil, bool bpp16,
nsTArray<EGLint>* out)
{
out->AppendElement(LOCAL_EGL_SURFACE_TYPE);
out->AppendElement(LOCAL_EGL_PBUFFER_BIT);
out->AppendElement(LOCAL_EGL_RENDERABLE_TYPE);
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, const SurfaceCaps& minCaps,
SurfaceCaps* const out_configCaps)
{
nsTArray<EGLint> configAttribList;
FillContextAttribs(minCaps.alpha, minCaps.depth, minCaps.stencil, minCaps.bpp16,
&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(const mozilla::gfx::IntSize& size,
const SurfaceCaps& minCaps)
{
SurfaceCaps configCaps;
EGLConfig config = ChooseConfig(&sEGLLibrary, minCaps, &configCaps);
if (config == 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) {
NS_WARNING("Failed to create PBuffer for context!");
return nullptr;
}
RefPtr<GLContextEGL> gl = GLContextEGL::CreateGLContext(configCaps, nullptr, true,
config, surface);
if (!gl) {
NS_WARNING("Failed to create GLContext from PBuffer");
sEGLLibrary.fDestroySurface(sEGLLibrary.Display(), surface);
return nullptr;
}
if (!gl->Init()) {
NS_WARNING("Failed to initialize GLContext!");
// GLContextEGL::dtor will destroy |surface| for us.
return nullptr;
}
return gl.forget();
}
/*static*/ already_AddRefed<GLContextEGL>
GLContextEGL::CreateEGLPixmapOffscreenContext(const mozilla::gfx::IntSize& size)
{
gfxASurface *thebesSurface = nullptr;
EGLNativePixmapType pixmap = 0;
if (!pixmap) {
return nullptr;
}
EGLSurface surface = 0;
EGLConfig config = 0;
if (!config) {
return nullptr;
}
MOZ_ASSERT(surface);
SurfaceCaps dummyCaps = SurfaceCaps::Any();
nsRefPtr<GLContextEGL> glContext =
GLContextEGL::CreateGLContext(dummyCaps,
nullptr, true,
config, surface);
if (!glContext) {
NS_WARNING("Failed to create GLContext from XSurface");
sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
return nullptr;
}
if (!glContext->Init()) {
NS_WARNING("Failed to initialize GLContext!");
// GLContextEGL::dtor will destroy |surface| for us.
return nullptr;
}
glContext->HoldSurface(thebesSurface);
return glContext.forget();
}
/*static*/ already_AddRefed<GLContext>
GLContextProviderEGL::CreateHeadless(CreateContextFlags flags)
{
bool forceEnableHardware = bool(flags & CreateContextFlags::FORCE_ENABLE_HARDWARE);
if (!sEGLLibrary.EnsureInitialized(forceEnableHardware))
return nullptr;
mozilla::gfx::IntSize dummySize = mozilla::gfx::IntSize(16, 16);
SurfaceCaps dummyCaps = SurfaceCaps::Any();
return GLContextEGL::CreateEGLPBufferOffscreenContext(dummySize, dummyCaps);
}
// 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)
{
bool forceEnableHardware = bool(flags & CreateContextFlags::FORCE_ENABLE_HARDWARE);
if (!sEGLLibrary.EnsureInitialized(forceEnableHardware))
return nullptr;
bool canOffscreenUseHeadless = true;
if (sEGLLibrary.IsANGLE()) {
// ANGLE needs to use PBuffers.
canOffscreenUseHeadless = false;
}
RefPtr<GLContext> gl;
SurfaceCaps minOffscreenCaps = minCaps;
if (canOffscreenUseHeadless) {
gl = CreateHeadless(flags);
if (!gl)
return nullptr;
} else {
SurfaceCaps minBackbufferCaps = minOffscreenCaps;
if (minOffscreenCaps.antialias) {
minBackbufferCaps.antialias = false;
minBackbufferCaps.depth = false;
minBackbufferCaps.stencil = false;
}
gl = GLContextEGL::CreateEGLPBufferOffscreenContext(size, minBackbufferCaps);
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))
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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