Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 110 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/opengl/Extensions3DOpenGL.cpp b/Source/WebCore/platform/graphics/opengl/Extensions3DOpenGL.cpp
new file mode 100644
index 0000000..4215d12
--- /dev/null
+++ b/Source/WebCore/platform/graphics/opengl/Extensions3DOpenGL.cpp
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ *
+ * 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 AND ITS CONTRIBUTORS "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 OR ITS 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"
+
+#if ENABLE(3D_CANVAS)
+
+#include "Extensions3DOpenGL.h"
+
+#include "GraphicsContext3D.h"
+#include <wtf/Vector.h>
+
+#if PLATFORM(MAC)
+#include <OpenGL/gl.h>
+#endif
+
+namespace WebCore {
+
+Extensions3DOpenGL::Extensions3DOpenGL()
+    : m_initializedAvailableExtensions(false)
+{
+}
+
+Extensions3DOpenGL::~Extensions3DOpenGL()
+{
+}
+
+bool Extensions3DOpenGL::supports(const String& name)
+{
+    // Note on support for BGRA:
+    //
+    // For OpenGL ES2.0, requires checking for
+    // GL_EXT_texture_format_BGRA8888 and GL_EXT_read_format_bgra.
+    // For desktop GL, BGRA has been supported since OpenGL 1.2.
+    //
+    // However, note that the GL ES2 extension requires the
+    // internalFormat to glTexImage2D() be GL_BGRA, while desktop GL
+    // will not accept GL_BGRA (must be GL_RGBA), so this must be
+    // checked on each platform. Desktop GL offers neither
+    // GL_EXT_texture_format_BGRA8888 or GL_EXT_read_format_bgra, so
+    // treat them as unsupported here.
+    if (!m_initializedAvailableExtensions) {
+        String extensionsString(reinterpret_cast<const char*>(::glGetString(GL_EXTENSIONS)));
+        Vector<String> availableExtensions;
+        extensionsString.split(" ", availableExtensions);
+        for (size_t i = 0; i < availableExtensions.size(); ++i)
+            m_availableExtensions.add(availableExtensions[i]);
+        m_initializedAvailableExtensions = true;
+    }
+    
+    // GL_ANGLE_framebuffer_blit and GL_ANGLE_framebuffer_multisample are "fake". They are implemented using other
+    // extensions. In particular GL_EXT_framebuffer_blit and GL_EXT_framebuffer_multisample
+    if (name == "GL_ANGLE_framebuffer_blit")
+        return m_availableExtensions.contains("GL_EXT_framebuffer_blit");
+    if (name == "GL_ANGLE_framebuffer_multisample")
+        return m_availableExtensions.contains("GL_EXT_framebuffer_multisample");
+
+    // If GL_ARB_texture_float is available then we report GL_OES_texture_float and
+    // GL_OES_texture_half_float as available.
+    if (name == "GL_OES_texture_float" || name == "GL_OES_texture_half_float")
+        return m_availableExtensions.contains("GL_ARB_texture_float");
+
+    return m_availableExtensions.contains(name);
+}
+
+void Extensions3DOpenGL::ensureEnabled(const String& name)
+{
+    ASSERT_UNUSED(name, supports(name));
+}
+
+int Extensions3DOpenGL::getGraphicsResetStatusARB()
+{
+    return GraphicsContext3D::NO_ERROR;
+}
+
+void Extensions3DOpenGL::blitFramebuffer(long srcX0, long srcY0, long srcX1, long srcY1, long dstX0, long dstY0, long dstX1, long dstY1, unsigned long mask, unsigned long filter)
+{
+    ::glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
+}
+
+void Extensions3DOpenGL::renderbufferStorageMultisample(unsigned long target, unsigned long samples, unsigned long internalformat, unsigned long width, unsigned long height)
+{
+    ::glRenderbufferStorageMultisampleEXT(target, samples, internalformat, width, height);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(3D_CANVAS)