Merge WebKit at r84325: Initial merge by git.

Change-Id: Ic1a909300ecc0a13ddc6b4e784371d2ac6e3d59b

1 files changed, 191 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/cairo/OpenGLShims.cpp b/Source/WebCore/platform/graphics/cairo/OpenGLShims.cpp
new file mode 100644
index 0000000..92d79f9
--- /dev/null
+++ b/Source/WebCore/platform/graphics/cairo/OpenGLShims.cpp
@@ -0,0 +1,191 @@
+/*
+ *  Copyright (C) 2011 Igalia S.L.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "config.h"
+#if ENABLE(WEBGL)
+
+#define DISABLE_SHIMS
+#include "OpenGLShims.h"
+
+#include <dlfcn.h>
+#include <wtf/text/CString.h>
+#include <wtf/text/WTFString.h>
+
+#define ASSIGN_FUNCTION_TABLE_ENTRY(FunctionName, success) \
+    openGLFunctionTable()->FunctionName = reinterpret_cast<FunctionName##Type>(lookupOpenGLFunctionAddress(#FunctionName, success))
+
+namespace WebCore {
+
+typedef void* (*glGetProcAddressType) (const char* procName);
+static void* getProcAddress(const char* procName)
+{
+    static bool initialized = false;
+    static glGetProcAddressType getProcAddressFunction = 0;
+
+    if (!initialized) {
+        getProcAddressFunction = reinterpret_cast<glGetProcAddressType>(dlsym(RTLD_DEFAULT, "glXGetProcAddress"));
+        if (!getProcAddressFunction)
+            getProcAddressFunction = reinterpret_cast<glGetProcAddressType>(dlsym(RTLD_DEFAULT, "glXGetProcAddressARB"));
+    }
+
+    if (!getProcAddressFunction)
+        return dlsym(RTLD_DEFAULT, procName);
+    return getProcAddressFunction(procName);
+}
+
+static void* lookupOpenGLFunctionAddress(const char* functionName, bool& success)
+{
+    if (!success)
+        return 0;
+
+    void* target = getProcAddress(functionName);
+    if (target)
+        return target;
+
+    String fullFunctionName(functionName);
+    fullFunctionName.append("ARB");
+    target = getProcAddress(fullFunctionName.utf8().data());
+    if (target)
+        return target;
+
+    fullFunctionName = functionName;
+    fullFunctionName.append("EXT");
+    target = getProcAddress(fullFunctionName.utf8().data());
+
+    // A null address is still a failure case.
+    if (!target)
+        success = false;
+
+    return target;
+}
+
+OpenGLFunctionTable* openGLFunctionTable()
+{
+    static OpenGLFunctionTable table;
+    return &table;
+}
+
+bool initializeOpenGLShims()
+{
+    static bool success = true;
+    static bool initialized = false;
+    if (initialized)
+        return success;
+
+    initialized = true;
+    ASSIGN_FUNCTION_TABLE_ENTRY(glActiveTexture, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glAttachShader, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBindAttribLocation, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBindBuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBindFramebuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBindRenderbuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBlendColor, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBlendEquation, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBlendEquationSeparate, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBlendFuncSeparate, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBlitFramebuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBufferData, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glBufferSubData, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glCheckFramebufferStatus, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glCompileShader, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glCreateProgram, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glCreateShader, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glDeleteBuffers, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glDeleteFramebuffers, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glDeleteProgram, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glDeleteRenderbuffers, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glDeleteShader, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glDetachShader, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glDisableVertexAttribArray, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glEnableVertexAttribArray, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glFramebufferRenderbuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glFramebufferTexture2D, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGenBuffers, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGenerateMipmap, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGenFramebuffers, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGenRenderbuffers, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetActiveAttrib, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetActiveUniform, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetAttachedShaders, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetAttribLocation, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetBufferParameteriv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetFramebufferAttachmentParameteriv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetProgramInfoLog, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetProgramiv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetRenderbufferParameteriv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetShaderInfoLog, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetShaderiv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetShaderSource, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetUniformfv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetUniformiv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetUniformLocation, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetVertexAttribfv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetVertexAttribiv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glGetVertexAttribPointerv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glIsBuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glIsFramebuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glIsProgram, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glIsRenderbuffer, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glIsShader, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glLinkProgram, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glRenderbufferStorage, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glRenderbufferStorageMultisample, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glSampleCoverage, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glShaderSource, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glStencilFuncSeparate, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glStencilMaskSeparate, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glStencilOpSeparate, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform1f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform1fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform1i, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform1iv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform2f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform2fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform2i, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform2iv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform3f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform3fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform3i, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform3iv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform4f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform4fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform4i, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniform4iv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniformMatrix2fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniformMatrix3fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUniformMatrix4fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glUseProgram, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glValidateProgram, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib1f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib1fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib2f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib2fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib3f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib3fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib4f, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttrib4fv, success);
+    ASSIGN_FUNCTION_TABLE_ENTRY(glVertexAttribPointer, success);
+
+    if (!success)
+        LOG_ERROR("Could not initialize OpenGL shims");
+    return success;
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEBGL)