/* -*- Mode: C++; tab-width: 4; 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 "WebGLExtensions.h" #include <algorithm> #include "GLContext.h" #include "mozilla/dom/WebGLRenderingContextBinding.h" #include "WebGLContext.h" #include "WebGLFramebuffer.h" #include "WebGLRenderbuffer.h" #include "WebGLTexture.h" namespace mozilla { WebGLExtensionDrawBuffers::WebGLExtensionDrawBuffers(WebGLContext* webgl) : WebGLExtensionBase(webgl) { MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported."); // WEBGL_draw_buffers: // "The value of the MAX_COLOR_ATTACHMENTS_WEBGL parameter must be greater than or // equal to that of the MAX_DRAW_BUFFERS_WEBGL parameter." webgl->mImplMaxColorAttachments = webgl->mGLMaxColorAttachments; webgl->mImplMaxDrawBuffers = std::min(webgl->mGLMaxDrawBuffers, webgl->mImplMaxColorAttachments); } WebGLExtensionDrawBuffers::~WebGLExtensionDrawBuffers() { } void WebGLExtensionDrawBuffers::DrawBuffersWEBGL(const dom::Sequence<GLenum>& buffers) { if (mIsLost) { if (mContext) { mContext->ErrorInvalidOperation("drawBuffersWEBGL: Extension is lost."); } return; } mContext->DrawBuffers(buffers); } bool WebGLExtensionDrawBuffers::IsSupported(const WebGLContext* webgl) { gl::GLContext* gl = webgl->GL(); if (!gl->IsExtensionSupported(gl::GLContext::ARB_draw_buffers) && !gl->IsExtensionSupported(gl::GLContext::EXT_draw_buffers)) { return false; } // WEBGL_draw_buffers requires at least 4 color attachments. if (webgl->mGLMaxDrawBuffers < webgl->kMinMaxDrawBuffers || webgl->mGLMaxColorAttachments < webgl->kMinMaxColorAttachments) { return false; } return true; } IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionDrawBuffers, WEBGL_draw_buffers) } // namespace mozilla