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-rw-r--r--dom/canvas/WebGLRenderbuffer.cpp256
1 files changed, 256 insertions, 0 deletions
diff --git a/dom/canvas/WebGLRenderbuffer.cpp b/dom/canvas/WebGLRenderbuffer.cpp
new file mode 100644
index 0000000000..ffeb42999c
--- /dev/null
+++ b/dom/canvas/WebGLRenderbuffer.cpp
@@ -0,0 +1,256 @@
+/* -*- 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) {
+ 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