already_AddRefed<GLContext>
GLContextProviderWGL::CreateOffscreen(const gfxIntSize& size,
const SurfaceCaps& caps)
{
if (!sWGLLib.EnsureInitialized()) {
return nullptr;
}
nsRefPtr<GLContextWGL> glContext;
// Always try to create a pbuffer context first, because we
// want the context isolation.
if (sWGLLib.fCreatePbuffer &&
sWGLLib.fChoosePixelFormat)
{
gfxIntSize dummySize = gfxIntSize(16, 16);
glContext = CreatePBufferOffscreenContext(dummySize, GetGlobalContextWGL());
}
// If it failed, then create a window context and use a FBO.
if (!glContext) {
glContext = CreateWindowOffscreenContext();
}
if (!glContext ||
!glContext->Init())
{
return nullptr;
}
if (!glContext->InitOffscreen(ToIntSize(size), caps))
return nullptr;
return glContext.forget();
}
already_AddRefed<GLContext>
GLContextProviderWGL::CreateOffscreen(const gfxIntSize& aSize,
const ContextFormat& aFormat,
const ContextFlags aFlags)
{
LibType libToUse = WGLLibrary::SelectLibrary(aFlags);
if (!sWGLLib[libToUse].EnsureInitialized(libToUse == WGLLibrary::MESA_LLVMPIPE_LIB)) {
return nullptr;
}
nsRefPtr<GLContextWGL> glContext;
// Always try to create a pbuffer context first, because we
// want the context isolation.
NS_ENSURE_TRUE(Preferences::GetRootBranch(), nullptr);
const bool preferFBOs = Preferences::GetBool("wgl.prefer-fbo", false);
if (!preferFBOs &&
sWGLLib[libToUse].fCreatePbuffer &&
sWGLLib[libToUse].fChoosePixelFormat)
{
glContext = CreatePBufferOffscreenContext(aSize, aFormat,libToUse);
}
// If it failed, then create a window context and use a FBO.
if (!glContext) {
glContext = CreateWindowOffscreenContext(aFormat, aFlags);
}
if (!glContext ||
!glContext->Init())
{
return nullptr;
}
if (!glContext->ResizeOffscreenFBOs(aSize, !glContext->mPBuffer))
return nullptr;
glContext->mOffscreenSize = aSize;
glContext->mOffscreenActualSize = aSize;
return glContext.forget();
}
already_AddRefed<GLContext>
GLContextProviderWGL::CreateOffscreen(const gfxIntSize& aSize,
const ContextFormat& aFormat)
{
if (!sWGLLibrary.EnsureInitialized()) {
return nsnull;
}
nsRefPtr<GLContextWGL> glContext;
// Always try to create a pbuffer context first, because we
// want the context isolation.
if (sWGLLibrary.fCreatePbuffer &&
sWGLLibrary.fChoosePixelFormat)
{
glContext = CreatePBufferOffscreenContext(aSize, aFormat);
}
// If it failed, then create a window context and use a FBO.
if (!glContext) {
glContext = CreateWindowOffscreenContext(aSize, aFormat);
}
if (!glContext ||
!glContext->Init())
{
return nsnull;
}
glContext->mOffscreenSize = aSize;
glContext->mOffscreenActualSize = aSize;
if (!glContext->mPBuffer &&
!glContext->ResizeOffscreenFBO(aSize))
{
return nsnull;
}
return glContext.forget();
}
already_AddRefed<GLContext>
GLContextProviderWGL::CreateOffscreen(const gfxIntSize& size,
const SurfaceCaps& caps,
ContextFlags flags)
{
LibType libToUse = WGLLibrary::SelectLibrary(flags);
if (!sWGLLib[libToUse].EnsureInitialized(libToUse == WGLLibrary::MESA_LLVMPIPE_LIB)) {
return nullptr;
}
nsRefPtr<GLContextWGL> glContext;
// Always try to create a pbuffer context first, because we
// want the context isolation.
if (sWGLLib[libToUse].fCreatePbuffer &&
sWGLLib[libToUse].fChoosePixelFormat)
{
gfxIntSize dummySize = gfxIntSize(16, 16);
glContext = CreatePBufferOffscreenContext(dummySize, libToUse);
}
// If it failed, then create a window context and use a FBO.
if (!glContext) {
glContext = CreateWindowOffscreenContext(flags);
}
if (!glContext ||
!glContext->Init())
{
return nullptr;
}
if (!glContext->InitOffscreen(size, caps))
return nullptr;
return glContext.forget();
}