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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "WebGLRenderbuffer.h"
#include "GLContext.h"
#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "ScopedGLHelpers.h"
#include "WebGLContext.h"
#include "WebGLFormats.h"
#include "WebGLStrongTypes.h"
#include "WebGLTexture.h"
namespace mozilla {
static GLenum DepthFormatForDepthStencilEmu(gl::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 GLuint DoCreateRenderbuffer(gl::GLContext* gl) {
MOZ_ASSERT(gl->IsCurrent());
GLuint ret = 0;
gl->fGenRenderbuffers(1, &ret);
return ret;
}
static bool EmulatePackedDepthStencil(gl::GLContext* gl) {
return !gl->IsSupported(gl::GLFeature::packed_depth_stencil);
}
WebGLRenderbuffer::WebGLRenderbuffer(WebGLContext* webgl)
: WebGLContextBoundObject(webgl),
mPrimaryRB(DoCreateRenderbuffer(webgl->gl)),
mEmulatePackedDepthStencil(EmulatePackedDepthStencil(webgl->gl)),
mSecondaryRB(0) {
// Bind our RB, or we might end up calling FramebufferRenderbuffer before we
// ever call BindRenderbuffer, since webgl.bindRenderbuffer doesn't actually
// call glBindRenderbuffer anymore.
mContext->gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mPrimaryRB);
mContext->gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, 0);
}
WebGLRenderbuffer::~WebGLRenderbuffer() {
mImageInfo = webgl::ImageInfo();
if (!mContext) return;
mContext->gl->fDeleteRenderbuffers(1, &mPrimaryRB);
if (mSecondaryRB) {
mContext->gl->fDeleteRenderbuffers(1, &mSecondaryRB);
}
}
static GLenum DoRenderbufferStorageMaybeMultisample(gl::GLContext* gl,
GLsizei samples,
GLenum internalFormat,
GLsizei width,
GLsizei height) {
MOZ_ASSERT_IF(samples >= 1,
gl->IsSupported(gl::GLFeature::framebuffer_multisample));
// Certain OpenGL ES renderbuffer formats may not exist on desktop OpenGL.
switch (internalFormat) {
case LOCAL_GL_RGBA4:
case LOCAL_GL_RGB5_A1:
// 16-bit RGBA formats are not supported on desktop GL.
if (!gl->IsGLES()) internalFormat = LOCAL_GL_RGBA8;
break;
case LOCAL_GL_RGB565:
// RGB565 is not supported on desktop GL.
if (!gl->IsGLES()) internalFormat = LOCAL_GL_RGB8;
break;
case LOCAL_GL_DEPTH_COMPONENT16:
if (!gl->IsGLES() || gl->IsExtensionSupported(gl::GLContext::OES_depth24))
internalFormat = LOCAL_GL_DEPTH_COMPONENT24;
else if (gl->IsSupported(gl::GLFeature::packed_depth_stencil))
internalFormat = LOCAL_GL_DEPTH24_STENCIL8;
break;
case LOCAL_GL_DEPTH_STENCIL:
MOZ_CRASH("GFX: GL_DEPTH_STENCIL is not valid here.");
break;
default:
break;
}
gl::GLContext::LocalErrorScope errorScope(*gl);
if (samples > 0) {
gl->fRenderbufferStorageMultisample(LOCAL_GL_RENDERBUFFER, samples,
internalFormat, width, height);
} else {
gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, internalFormat, width,
height);
}
return errorScope.GetError();
}
GLenum WebGLRenderbuffer::DoRenderbufferStorage(
uint32_t samples, const webgl::FormatUsageInfo* format, uint32_t width,
uint32_t height) {
gl::GLContext* gl = mContext->gl;
MOZ_ASSERT(samples <= 256); // Sanity check.
GLenum primaryFormat = format->format->sizedFormat;
GLenum secondaryFormat = 0;
if (mEmulatePackedDepthStencil &&
primaryFormat == LOCAL_GL_DEPTH24_STENCIL8) {
primaryFormat = DepthFormatForDepthStencilEmu(gl);
secondaryFormat = LOCAL_GL_STENCIL_INDEX8;
}
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mPrimaryRB);
GLenum error = DoRenderbufferStorageMaybeMultisample(
gl, samples, primaryFormat, width, height);
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, 0);
if (error) return error;
if (secondaryFormat) {
if (!mSecondaryRB) {
gl->fGenRenderbuffers(1, &mSecondaryRB);
}
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mSecondaryRB);
error = DoRenderbufferStorageMaybeMultisample(gl, samples, secondaryFormat,
width, height);
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, 0);
if (error) return error;
} else if (mSecondaryRB) {
gl->fDeleteRenderbuffers(1, &mSecondaryRB);
mSecondaryRB = 0;
}
return 0;
}
void WebGLRenderbuffer::RenderbufferStorage(uint32_t samples,
GLenum internalFormat,
uint32_t width, uint32_t height) {
const auto usage = mContext->mFormatUsage->GetRBUsage(internalFormat);
if (!usage) {
mContext->ErrorInvalidEnum("Invalid `internalFormat`: 0x%04x.",
internalFormat);
return;
}
if (width > mContext->mGLMaxRenderbufferSize ||
height > mContext->mGLMaxRenderbufferSize) {
mContext->ErrorInvalidValue(
"Width or height exceeds maximum renderbuffer"
" size.");
return;
}
const auto maxSamples = usage->MaxSamples(*mContext->gl);
if (samples > maxSamples) {
mContext->ErrorInvalidOperation("`samples` is out of the valid range.");
return;
}
// Validation complete.
const GLenum error = DoRenderbufferStorage(samples, usage, width, height);
if (error) {
mContext->GenerateWarning("Unexpected error %s", EnumString(error).c_str());
if (error == LOCAL_GL_OUT_OF_MEMORY) {
// Truncate.
mImageInfo = {};
InvalidateCaches();
}
return;
}
mContext->OnDataAllocCall();
const uint32_t depth = 1;
auto uninitializedSlices = Some(std::vector<bool>(depth, true));
mImageInfo = {
usage, width, height, depth, std::move(uninitializedSlices),
uint8_t(samples)};
InvalidateCaches();
}
void WebGLRenderbuffer::DoFramebufferRenderbuffer(
const GLenum attachment) const {
gl::GLContext* gl = mContext->gl;
if (attachment == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT) {
const GLuint stencilRB = (mSecondaryRB ? mSecondaryRB : mPrimaryRB);
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);
return;
}
gl->fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER, attachment,
LOCAL_GL_RENDERBUFFER, mPrimaryRB);
}
GLint WebGLRenderbuffer::GetRenderbufferParameter(RBParam pname) const {
gl::GLContext* gl = mContext->gl;
switch (pname.get()) {
case LOCAL_GL_RENDERBUFFER_STENCIL_SIZE:
if (!mImageInfo.mFormat) return 0;
if (!mImageInfo.mFormat->format->s) return 0;
return 8;
case LOCAL_GL_RENDERBUFFER_SAMPLES:
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: {
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, mPrimaryRB);
GLint i = 0;
gl->fGetRenderbufferParameteriv(LOCAL_GL_RENDERBUFFER, pname.get(), &i);
gl->fBindRenderbuffer(LOCAL_GL_RENDERBUFFER, 0);
return i;
}
case LOCAL_GL_RENDERBUFFER_INTERNAL_FORMAT: {
GLenum ret = LOCAL_GL_RGBA4;
if (mImageInfo.mFormat) {
ret = mImageInfo.mFormat->format->sizedFormat;
if (!mContext->IsWebGL2() && ret == LOCAL_GL_DEPTH24_STENCIL8) {
ret = LOCAL_GL_DEPTH_STENCIL;
}
}
return ret;
}
}
MOZ_ASSERT(false, "This function should only be called with valid `pname`.");
return 0;
}
} // namespace mozilla
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