bool
WebGLFramebuffer::ValidateForRead(const char* funcName,
const webgl::FormatUsageInfo** const out_format,
uint32_t* const out_width, uint32_t* const out_height)
{
if (!CheckAndInitializeAttachments()) {
mContext->ErrorInvalidFramebufferOperation("%s: Incomplete framebuffer.",
funcName);
return false;
}
if (mReadBufferMode == LOCAL_GL_NONE) {
mContext->ErrorInvalidOperation("%s: Read buffer mode must not be"
" NONE.", funcName);
return false;
}
const auto attachPoint = GetAttachPoint(mReadBufferMode);
if (!attachPoint || !attachPoint->IsDefined()) {
mContext->ErrorInvalidOperation("%s: The attachment specified for reading is"
" null.", funcName);
return false;
}
*out_format = attachPoint->Format();
attachPoint->Size(out_width, out_height);
return true;
}
bool
WebGLFramebuffer::ValidateForRead(const char* info, TexInternalFormat* const out_format)
{
if (mReadBufferMode == LOCAL_GL_NONE) {
mContext->ErrorInvalidOperation("%s: Read buffer mode must not be"
" NONE.", info);
return false;
}
const auto& attachPoint = GetAttachPoint(mReadBufferMode);
if (!CheckAndInitializeAttachments()) {
mContext->ErrorInvalidFramebufferOperation("readPixels: incomplete framebuffer");
return false;
}
GLenum readPlaneBits = LOCAL_GL_COLOR_BUFFER_BIT;
if (!HasCompletePlanes(readPlaneBits)) {
mContext->ErrorInvalidOperation("readPixels: Read source attachment doesn't have the"
" correct color/depth/stencil type.");
return false;
}
if (!attachPoint.IsDefined()) {
mContext->ErrorInvalidOperation("readPixels: ");
return false;
}
*out_format = attachPoint.EffectiveInternalFormat();
return true;
}
