1 files changed, 158 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/gtk/GraphicsContext3DGtk.cpp b/Source/WebCore/platform/graphics/gtk/GraphicsContext3DGtk.cpp
new file mode 100644
index 0000000..8e03ad7
--- /dev/null
+++ b/Source/WebCore/platform/graphics/gtk/GraphicsContext3DGtk.cpp
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2011 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "GraphicsContext3D.h"
+
+#if ENABLE(WEBGL)
+
+#include "Extensions3DOpenGL.h"
+#include "GraphicsContext3DInternal.h"
+#include "OpenGLShims.h"
+#include "ShaderLang.h"
+#include <wtf/NotFound.h>
+
+namespace WebCore {
+
+PassRefPtr<GraphicsContext3D> GraphicsContext3D::create(GraphicsContext3D::Attributes attributes, HostWindow* hostWindow, GraphicsContext3D::RenderStyle renderStyle)
+{
+    // This implementation doesn't currently support rendering directly to the HostWindow.
+    if (renderStyle == RenderDirectlyToHostWindow)
+        return 0;
+
+    GraphicsContext3DInternal* internal = GraphicsContext3DInternal::create();
+    if (!internal)
+        return 0;
+
+    RefPtr<GraphicsContext3D> context = adoptRef(new GraphicsContext3D(attributes, hostWindow, false));
+    context->m_internal.set(internal);
+    return context.release();
+}
+
+GraphicsContext3D::GraphicsContext3D(GraphicsContext3D::Attributes attributes, HostWindow*, bool)
+    : m_currentWidth(0)
+    , m_currentHeight(0)
+    , m_attrs(attributes)
+    , m_texture(0)
+    , m_fbo(0)
+    , m_depthStencilBuffer(0)
+    , m_boundFBO(0)
+    , m_multisampleFBO(0)
+    , m_multisampleDepthStencilBuffer(0)
+    , m_multisampleColorBuffer(0)
+{
+    GraphicsContext3DInternal::addActiveGraphicsContext(this);
+
+    validateAttributes();
+
+    // Create a texture to render into.
+    ::glGenTextures(1, &m_texture);
+    ::glBindTexture(GL_TEXTURE_2D, m_texture);
+    ::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    ::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+    ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+    ::glBindTexture(GL_TEXTURE_2D, 0);
+
+    // Create an FBO.
+    ::glGenFramebuffersEXT(1, &m_fbo);
+    ::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
+
+    m_boundFBO = m_fbo;
+    if (!m_attrs.antialias && (m_attrs.stencil || m_attrs.depth))
+        ::glGenRenderbuffersEXT(1, &m_depthStencilBuffer);
+    
+    // Create a multisample FBO.
+    if (m_attrs.antialias) {
+        ::glGenFramebuffersEXT(1, &m_multisampleFBO);
+        ::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_multisampleFBO);
+        m_boundFBO = m_multisampleFBO;
+        ::glGenRenderbuffersEXT(1, &m_multisampleColorBuffer);
+        if (m_attrs.stencil || m_attrs.depth)
+            ::glGenRenderbuffersEXT(1, &m_multisampleDepthStencilBuffer);
+    }
+
+    // ANGLE initialization.
+    ShBuiltInResources ANGLEResources;
+    ShInitBuiltInResources(&ANGLEResources);
+
+    getIntegerv(GraphicsContext3D::MAX_VERTEX_ATTRIBS, &ANGLEResources.MaxVertexAttribs);
+    getIntegerv(GraphicsContext3D::MAX_VERTEX_UNIFORM_VECTORS, &ANGLEResources.MaxVertexUniformVectors);
+    getIntegerv(GraphicsContext3D::MAX_VARYING_VECTORS, &ANGLEResources.MaxVaryingVectors);
+    getIntegerv(GraphicsContext3D::MAX_VERTEX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxVertexTextureImageUnits);
+    getIntegerv(GraphicsContext3D::MAX_COMBINED_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxCombinedTextureImageUnits);
+    getIntegerv(GraphicsContext3D::MAX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxTextureImageUnits);
+    getIntegerv(GraphicsContext3D::MAX_FRAGMENT_UNIFORM_VECTORS, &ANGLEResources.MaxFragmentUniformVectors);
+
+    // Always set to 1 for OpenGL ES.
+    ANGLEResources.MaxDrawBuffers = 1;
+    m_compiler.setResources(ANGLEResources);
+
+    ::glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
+    ::glEnable(GL_POINT_SPRITE);
+    ::glClearColor(0, 0, 0, 0);
+}
+
+GraphicsContext3D::~GraphicsContext3D()
+{
+    GraphicsContext3DInternal::removeActiveGraphicsContext(this);
+    if (!m_internal->m_context)
+        return;
+
+    makeContextCurrent();
+    ::glDeleteTextures(1, &m_texture);
+    if (m_attrs.antialias) {
+        ::glDeleteRenderbuffersEXT(1, &m_multisampleColorBuffer);
+        if (m_attrs.stencil || m_attrs.depth)
+            ::glDeleteRenderbuffersEXT(1, &m_multisampleDepthStencilBuffer);
+        ::glDeleteFramebuffersEXT(1, &m_multisampleFBO);
+    } else {
+        if (m_attrs.stencil || m_attrs.depth)
+            ::glDeleteRenderbuffersEXT(1, &m_depthStencilBuffer);
+    }
+    ::glDeleteFramebuffersEXT(1, &m_fbo);
+}
+
+void GraphicsContext3D::makeContextCurrent()
+{
+    if (!m_internal)
+        return;
+    m_internal->makeContextCurrent();
+}
+
+PlatformGraphicsContext3D GraphicsContext3D::platformGraphicsContext3D()
+{
+    return m_internal->m_context;
+}
+
+bool GraphicsContext3D::isGLES2Compliant() const
+{
+    return false;
+}
+
+}
+
+#endif // ENABLE(WEBGL)