void
LayerManagerOGL::CreateFBOWithTexture(const nsIntRect& aRect, InitMode aInit,
GLuint aCurrentFrameBuffer,
GLuint *aFBO, GLuint *aTexture)
{
GLuint tex, fbo;
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
mGLContext->fGenTextures(1, &tex);
mGLContext->fBindTexture(mFBOTextureTarget, tex);
if (aInit == InitModeCopy) {
// We're going to create an RGBA temporary fbo. But to
// CopyTexImage() from the current framebuffer, the framebuffer's
// format has to be compatible with the new texture's. So we
// check the format of the framebuffer here and take a slow path
// if it's incompatible.
GLenum format =
GetFrameBufferInternalFormat(gl(), aCurrentFrameBuffer, mWidget);
if (AreFormatsCompatibleForCopyTexImage2D(format, LOCAL_GL_RGBA)) {
mGLContext->fCopyTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.x, aRect.y,
aRect.width, aRect.height,
0);
} else {
// Curses, incompatible formats. Take a slow path.
//
// XXX Technically CopyTexSubImage2D also has the requirement of
// matching formats, but it doesn't seem to affect us in the
// real world.
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.width, aRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
NULL);
mGLContext->fCopyTexSubImage2D(mFBOTextureTarget,
0, // level
0, 0, // offset
aRect.x, aRect.y,
aRect.width, aRect.height);
}
} else {
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.width, aRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
NULL);
}
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MIN_FILTER,
LOCAL_GL_LINEAR);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MAG_FILTER,
LOCAL_GL_LINEAR);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_S,
LOCAL_GL_CLAMP_TO_EDGE);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_T,
LOCAL_GL_CLAMP_TO_EDGE);
mGLContext->fBindTexture(mFBOTextureTarget, 0);
mGLContext->fGenFramebuffers(1, &fbo);
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
mGLContext->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
mFBOTextureTarget,
tex,
0);
// Making this call to fCheckFramebufferStatus prevents a crash on
// PowerVR. See bug 695246.
GLenum result = mGLContext->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
nsCAutoString msg;
msg.Append("Framebuffer not complete -- error 0x");
msg.AppendInt(result, 16);
msg.Append(", mFBOTextureTarget 0x");
msg.AppendInt(mFBOTextureTarget, 16);
msg.Append(", aRect.width ");
msg.AppendInt(aRect.width);
msg.Append(", aRect.height ");
msg.AppendInt(aRect.height);
NS_RUNTIMEABORT(msg.get());
}
SetupPipeline(aRect.width, aRect.height, DontApplyWorldTransform);
mGLContext->fScissor(0, 0, aRect.width, aRect.height);
if (aInit == InitModeClear) {
mGLContext->fClearColor(0.0, 0.0, 0.0, 0.0);
mGLContext->fClear(LOCAL_GL_COLOR_BUFFER_BIT);
}
*aFBO = fbo;
*aTexture = tex;
}
void
CompositorOGL::CreateFBOWithTexture(const IntRect& aRect, SurfaceInitMode aInit,
GLuint aSourceFrameBuffer,
GLuint *aFBO, GLuint *aTexture)
{
GLuint tex, fbo;
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
mGLContext->fGenTextures(1, &tex);
mGLContext->fBindTexture(mFBOTextureTarget, tex);
if (aInit == INIT_MODE_COPY) {
GLuint curFBO = mCurrentRenderTarget->GetFBO();
if (curFBO != aSourceFrameBuffer) {
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, aSourceFrameBuffer);
}
// We're going to create an RGBA temporary fbo. But to
// CopyTexImage() from the current framebuffer, the framebuffer's
// format has to be compatible with the new texture's. So we
// check the format of the framebuffer here and take a slow path
// if it's incompatible.
GLenum format =
GetFrameBufferInternalFormat(gl(), aSourceFrameBuffer, mWidget);
bool isFormatCompatibleWithRGBA
= gl()->IsGLES2() ? (format == LOCAL_GL_RGBA)
: true;
if (isFormatCompatibleWithRGBA) {
mGLContext->fCopyTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.x, aRect.y,
aRect.width, aRect.height,
0);
} else {
// Curses, incompatible formats. Take a slow path.
// RGBA
size_t bufferSize = aRect.width * aRect.height * 4;
nsAutoArrayPtr<uint8_t> buf(new uint8_t[bufferSize]);
mGLContext->fReadPixels(aRect.x, aRect.y,
aRect.width, aRect.height,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
buf);
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.width, aRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
buf);
}
GLenum error = mGLContext->GetAndClearError();
if (error != LOCAL_GL_NO_ERROR) {
nsAutoCString msg;
msg.AppendPrintf("Texture initialization failed! -- error 0x%x, Source %d, Source format %d, RGBA Compat %d",
error, aSourceFrameBuffer, format, isFormatCompatibleWithRGBA);
NS_ERROR(msg.get());
}
} else {
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.width, aRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
nullptr);
}
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MIN_FILTER,
LOCAL_GL_LINEAR);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MAG_FILTER,
LOCAL_GL_LINEAR);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_S,
LOCAL_GL_CLAMP_TO_EDGE);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_T,
LOCAL_GL_CLAMP_TO_EDGE);
mGLContext->fBindTexture(mFBOTextureTarget, 0);
mGLContext->fGenFramebuffers(1, &fbo);
*aFBO = fbo;
*aTexture = tex;
}
