int64_t
WebGLRenderbuffer::MemoryUsage() const
{
int64_t pixels = int64_t(Width()) * int64_t(Height());
GLenum primaryFormat = InternalFormatForGL();
// If there is no defined format, we're not taking up any memory
if (!primaryFormat)
return 0;
int64_t secondarySize = 0;
if (mSecondaryRB) {
if (NeedsDepthStencilEmu(mContext->gl, primaryFormat)) {
primaryFormat = DepthStencilDepthFormat(mContext->gl);
secondarySize = 1*pixels; // STENCIL_INDEX8
} else {
secondarySize = 1*1*2; // 1x1xRGBA4
}
}
int64_t primarySize = 0;
switch (primaryFormat) {
case LOCAL_GL_STENCIL_INDEX8:
primarySize = 1*pixels;
break;
case LOCAL_GL_RGBA4:
case LOCAL_GL_RGB5_A1:
case LOCAL_GL_RGB565:
case LOCAL_GL_DEPTH_COMPONENT16:
primarySize = 2*pixels;
break;
case LOCAL_GL_RGB8:
case LOCAL_GL_DEPTH_COMPONENT24:
primarySize = 3*pixels;
break;
case LOCAL_GL_RGBA8:
case LOCAL_GL_SRGB8_ALPHA8_EXT:
case LOCAL_GL_DEPTH24_STENCIL8:
case LOCAL_GL_DEPTH_COMPONENT32:
primarySize = 4*pixels;
break;
case LOCAL_GL_RGB16F:
primarySize = 2*3*pixels;
break;
case LOCAL_GL_RGBA16F:
primarySize = 2*4*pixels;
break;
case LOCAL_GL_RGB32F:
primarySize = 4*3*pixels;
break;
case LOCAL_GL_RGBA32F:
primarySize = 4*4*pixels;
break;
default:
MOZ_ASSERT(false, "Unknown `primaryFormat`.");
break;
}
return primarySize + secondarySize;
}
void
WebGLRenderbuffer::RenderbufferStorage(GLenum internalFormat, GLsizei width,
GLsizei height) const
{
gl::GLContext* gl = mContext->gl;
GLenum primaryFormat = internalFormat;
GLenum secondaryFormat = 0;
if (NeedsDepthStencilEmu(mContext->gl, primaryFormat)) {
primaryFormat = DepthStencilDepthFormat(gl);
secondaryFormat = LOCAL_GL_STENCIL_INDEX8;
}
gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, primaryFormat, width, height);
if (!mSecondaryRB) {
MOZ_ASSERT(!secondaryFormat);
return;
}
// We can't leave the secondary RB unspecified either, since we should
// handle the case where we attach a non-depth-stencil RB to a
// depth-stencil attachment point, or attach this depth-stencil RB to a
// non-depth-stencil attachment point.
gl::ScopedBindRenderbuffer autoRB(gl, mSecondaryRB);
if (secondaryFormat) {
gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, secondaryFormat, width, height);
} else {
gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, LOCAL_GL_RGBA4, 1, 1);
}
}
void
WebGLRenderbuffer::RenderbufferStorage(GLsizei samples,
const webgl::FormatUsageInfo* format,
GLsizei width, GLsizei height)
{
MOZ_ASSERT(mContext->mBoundRenderbuffer == this);
gl::GLContext* gl = mContext->gl;
MOZ_ASSERT(samples >= 0 && samples <= 256); // Sanity check.
GLenum primaryFormat = format->format->sizedFormat;
GLenum secondaryFormat = 0;
if (NeedsDepthStencilEmu(mContext->gl, primaryFormat)) {
primaryFormat = DepthStencilDepthFormat(gl);
secondaryFormat = LOCAL_GL_STENCIL_INDEX8;
}
RenderbufferStorageMaybeMultisample(gl, samples, primaryFormat, width,
height);
if (mSecondaryRB) {
// We can't leave the secondary RB unspecified either, since we should
// handle the case where we attach a non-depth-stencil RB to a
// depth-stencil attachment point, or attach this depth-stencil RB to a
// non-depth-stencil attachment point.
gl::ScopedBindRenderbuffer autoRB(gl, mSecondaryRB);
if (secondaryFormat) {
RenderbufferStorageMaybeMultisample(gl, samples, secondaryFormat, width,
height);
} else {
RenderbufferStorageMaybeMultisample(gl, samples, LOCAL_GL_RGBA4, 1, 1);
}
}
mSamples = samples;
mFormat = format;
mWidth = width;
mHeight = height;
mImageDataStatus = WebGLImageDataStatus::UninitializedImageData;
mIsUsingSecondary = bool(secondaryFormat);
InvalidateStatusOfAttachedFBs();
}
