mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-08 20:47:44 +00:00
244 lines
8.1 KiB
C++
244 lines
8.1 KiB
C++
/* -*- 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/. */
|
|
|
|
#include "WebGLContext.h"
|
|
#include "WebGLRenderbuffer.h"
|
|
#include "WebGLTexture.h"
|
|
#include "mozilla/dom/WebGLRenderingContextBinding.h"
|
|
#include "GLContext.h"
|
|
#include "ScopedGLHelpers.h"
|
|
|
|
using namespace mozilla;
|
|
using namespace mozilla::gl;
|
|
|
|
static GLenum
|
|
DepthStencilDepthFormat(GLContext* gl) {
|
|
// We might not be able to get 24-bit, so let's pretend!
|
|
if (gl->IsGLES() && !gl->IsExtensionSupported(gl::GLContext::OES_depth24))
|
|
return LOCAL_GL_DEPTH_COMPONENT16;
|
|
|
|
return LOCAL_GL_DEPTH_COMPONENT24;
|
|
}
|
|
|
|
static bool
|
|
SupportsDepthStencil(GLContext* gl) {
|
|
return gl->IsExtensionSupported(GLContext::EXT_packed_depth_stencil) ||
|
|
gl->IsExtensionSupported(GLContext::OES_packed_depth_stencil);
|
|
}
|
|
|
|
static bool
|
|
NeedsDepthStencilEmu(GLContext* gl, GLenum internalFormat) {
|
|
MOZ_ASSERT(internalFormat != LOCAL_GL_DEPTH_STENCIL);
|
|
if (internalFormat != LOCAL_GL_DEPTH24_STENCIL8)
|
|
return false;
|
|
|
|
return !SupportsDepthStencil(gl);
|
|
}
|
|
|
|
JSObject*
|
|
WebGLRenderbuffer::WrapObject(JSContext *cx) {
|
|
return dom::WebGLRenderbufferBinding::Wrap(cx, this);
|
|
}
|
|
|
|
WebGLRenderbuffer::WebGLRenderbuffer(WebGLContext *context)
|
|
: WebGLBindableName<RBTarget>()
|
|
, WebGLContextBoundObject(context)
|
|
, mPrimaryRB(0)
|
|
, mSecondaryRB(0)
|
|
, mInternalFormat(0)
|
|
, mInternalFormatForGL(0)
|
|
, mImageDataStatus(WebGLImageDataStatus::NoImageData)
|
|
{
|
|
mContext->MakeContextCurrent();
|
|
|
|
mContext->gl->fGenRenderbuffers(1, &mPrimaryRB);
|
|
if (!SupportsDepthStencil(mContext->gl))
|
|
mContext->gl->fGenRenderbuffers(1, &mSecondaryRB);
|
|
|
|
mContext->mRenderbuffers.insertBack(this);
|
|
}
|
|
|
|
void
|
|
WebGLRenderbuffer::Delete() {
|
|
mContext->MakeContextCurrent();
|
|
|
|
mContext->gl->fDeleteRenderbuffers(1, &mPrimaryRB);
|
|
if (mSecondaryRB)
|
|
mContext->gl->fDeleteRenderbuffers(1, &mSecondaryRB);
|
|
|
|
LinkedListElement<WebGLRenderbuffer>::removeFrom(mContext->mRenderbuffers);
|
|
}
|
|
|
|
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::BindRenderbuffer() const {
|
|
/* Do this explicitly here, since the meaning changes for depth-stencil emu.
|
|
* Under normal circumstances, there's only one RB: `mPrimaryRB`.
|
|
* `mSecondaryRB` is used when we have to pretend that the renderbuffer is
|
|
* DEPTH_STENCIL, when it's actually one DEPTH buffer `mPrimaryRB` and one
|
|
* STENCIL buffer `mSecondaryRB`.
|
|
*
|
|
* In the DEPTH_STENCIL emulation case, we're actually juggling two RBs, but
|
|
* we can only bind one of them at a time. We choose to unconditionally bind
|
|
* the depth RB. When we need to ask about the stencil buffer (say, how many
|
|
* stencil bits we have), we temporarily bind the stencil RB, so that it
|
|
* looks like we're just asking the question of a combined DEPTH_STENCIL
|
|
* buffer.
|
|
*/
|
|
mContext->gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mPrimaryRB);
|
|
}
|
|
|
|
void
|
|
WebGLRenderbuffer::RenderbufferStorage(GLenum internalFormat, GLsizei width, GLsizei height) const {
|
|
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.
|
|
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::FramebufferRenderbuffer(FBAttachment attachment) const {
|
|
GLContext* gl = mContext->gl;
|
|
if (attachment != LOCAL_GL_DEPTH_STENCIL_ATTACHMENT) {
|
|
gl->fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER, attachment.get(), LOCAL_GL_RENDERBUFFER, mPrimaryRB);
|
|
return;
|
|
}
|
|
|
|
GLuint stencilRB = mPrimaryRB;
|
|
if (NeedsDepthStencilEmu(mContext->gl, InternalFormatForGL())) {
|
|
printf_stderr("DEV-ONLY: Using secondary buffer to emulate DepthStencil.\n");
|
|
MOZ_ASSERT(mSecondaryRB);
|
|
stencilRB = mSecondaryRB;
|
|
}
|
|
gl->fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_DEPTH_ATTACHMENT, LOCAL_GL_RENDERBUFFER, mPrimaryRB);
|
|
gl->fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_STENCIL_ATTACHMENT, LOCAL_GL_RENDERBUFFER, stencilRB);
|
|
}
|
|
|
|
GLint
|
|
WebGLRenderbuffer::GetRenderbufferParameter(RBTarget target, RBParam pname) const {
|
|
GLContext* gl = mContext->gl;
|
|
|
|
switch (pname.get()) {
|
|
case LOCAL_GL_RENDERBUFFER_STENCIL_SIZE: {
|
|
if (NeedsDepthStencilEmu(mContext->gl, InternalFormatForGL())) {
|
|
if (gl->WorkAroundDriverBugs() &&
|
|
gl->Renderer() == GLRenderer::Tegra)
|
|
{
|
|
return 8;
|
|
}
|
|
|
|
ScopedBindRenderbuffer autoRB(gl, mSecondaryRB);
|
|
|
|
GLint i = 0;
|
|
gl->fGetRenderbufferParameteriv(target.get(), pname.get(), &i);
|
|
return i;
|
|
}
|
|
// Fall through otherwise.
|
|
}
|
|
case LOCAL_GL_RENDERBUFFER_WIDTH:
|
|
case LOCAL_GL_RENDERBUFFER_HEIGHT:
|
|
case LOCAL_GL_RENDERBUFFER_RED_SIZE:
|
|
case LOCAL_GL_RENDERBUFFER_GREEN_SIZE:
|
|
case LOCAL_GL_RENDERBUFFER_BLUE_SIZE:
|
|
case LOCAL_GL_RENDERBUFFER_ALPHA_SIZE:
|
|
case LOCAL_GL_RENDERBUFFER_DEPTH_SIZE: {
|
|
GLint i = 0;
|
|
gl->fGetRenderbufferParameteriv(target.get(), pname.get(), &i);
|
|
return i;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(false, "This function should only be called with valid `pname`.");
|
|
return 0;
|
|
}
|
|
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLRenderbuffer)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLRenderbuffer, AddRef)
|
|
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLRenderbuffer, Release)
|