Initial import from the monolithic Qt.

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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 430 insertions, 0 deletions

diff --git a/src/opengl/qglextensions.cpp b/src/opengl/qglextensions.cpp
new file mode 100644
index 00000000000..731896b8bc2
--- /dev/null
+++ b/src/opengl/qglextensions.cpp
@@ -0,0 +1,430 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation ([email protected])
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at [email protected].
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgl_p.h"
+
+QT_BEGIN_NAMESPACE
+
+static void *qt_gl_getProcAddress_search
+    (QGLContext *ctx, const char *name1, const char *name2,
+     const char *name3, const char *name4)
+{
+    void *addr;
+
+    addr = ctx->getProcAddress(QLatin1String(name1));
+    if (addr)
+        return addr;
+
+    addr = ctx->getProcAddress(QLatin1String(name2));
+    if (addr)
+        return addr;
+
+    addr = ctx->getProcAddress(QLatin1String(name3));
+    if (addr)
+        return addr;
+
+    if (name4)
+        return ctx->getProcAddress(QLatin1String(name4));
+
+    return 0;
+}
+
+// Search for an extension function starting with the most likely
+// function suffix first, and then trying the other variations.
+#if defined(QT_OPENGL_ES)
+#define qt_gl_getProcAddress(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name, name "OES", name "EXT", name "ARB")
+#define qt_gl_getProcAddressEXT(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name "OES", name, name "EXT", name "ARB")
+#define qt_gl_getProcAddressARB(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name "OES", name, name "ARB", name "EXT")
+#define qt_gl_getProcAddressOES(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name "OES", name, name "EXT", name "ARB")
+#else
+#define qt_gl_getProcAddress(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name, name "ARB", name "EXT", 0)
+#define qt_gl_getProcAddressEXT(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name "EXT", name, name "ARB", 0)
+#define qt_gl_getProcAddressARB(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name "ARB", name, name "EXT", 0)
+#define qt_gl_getProcAddressOES(ctx,name) \
+    qt_gl_getProcAddress_search((ctx), name "OES", name, name "EXT", name "ARB")
+#endif
+
+bool qt_resolve_framebufferobject_extensions(QGLContext *ctx)
+{
+#if defined(QT_OPENGL_ES_2)
+    static bool have_resolved = false;
+    if (have_resolved)
+        return true;
+    have_resolved = true;
+#else
+    if (glIsRenderbuffer != 0)
+        return true;
+#endif
+
+    if (ctx == 0) {
+        qWarning("QGLFramebufferObject: Unable to resolve framebuffer object extensions -"
+                 " make sure there is a current context when creating the framebuffer object.");
+        return false;
+    }
+
+
+    glBlitFramebufferEXT = (_glBlitFramebufferEXT) qt_gl_getProcAddressEXT(ctx, "glBlitFramebuffer");
+    glRenderbufferStorageMultisampleEXT =
+        (_glRenderbufferStorageMultisampleEXT) qt_gl_getProcAddressEXT(ctx, "glRenderbufferStorageMultisample");
+
+#if !defined(QT_OPENGL_ES_2)
+    glIsRenderbuffer = (_glIsRenderbuffer) qt_gl_getProcAddressEXT(ctx, "glIsRenderbuffer");
+    if (!glIsRenderbuffer)
+        return false;   // Not much point searching for anything else.
+    glBindRenderbuffer = (_glBindRenderbuffer) qt_gl_getProcAddressEXT(ctx, "glBindRenderbuffer");
+    glDeleteRenderbuffers = (_glDeleteRenderbuffers) qt_gl_getProcAddressEXT(ctx, "glDeleteRenderbuffers");
+    glGenRenderbuffers = (_glGenRenderbuffers) qt_gl_getProcAddressEXT(ctx, "glGenRenderbuffers");
+    glRenderbufferStorage = (_glRenderbufferStorage) qt_gl_getProcAddressEXT(ctx, "glRenderbufferStorage");
+    glGetRenderbufferParameteriv =
+        (_glGetRenderbufferParameteriv) qt_gl_getProcAddressEXT(ctx, "glGetRenderbufferParameteriv");
+    glIsFramebuffer = (_glIsFramebuffer) qt_gl_getProcAddressEXT(ctx, "glIsFramebuffer");
+    glBindFramebuffer = (_glBindFramebuffer) qt_gl_getProcAddressEXT(ctx, "glBindFramebuffer");
+    glDeleteFramebuffers = (_glDeleteFramebuffers) qt_gl_getProcAddressEXT(ctx, "glDeleteFramebuffers");
+    glGenFramebuffers = (_glGenFramebuffers) qt_gl_getProcAddressEXT(ctx, "glGenFramebuffers");
+    glCheckFramebufferStatus = (_glCheckFramebufferStatus) qt_gl_getProcAddressEXT(ctx, "glCheckFramebufferStatus");
+    glFramebufferTexture2D = (_glFramebufferTexture2D) qt_gl_getProcAddressEXT(ctx, "glFramebufferTexture2D");
+    glFramebufferRenderbuffer = (_glFramebufferRenderbuffer) qt_gl_getProcAddressEXT(ctx, "glFramebufferRenderbuffer");
+    glGetFramebufferAttachmentParameteriv =
+        (_glGetFramebufferAttachmentParameteriv) qt_gl_getProcAddressEXT(ctx, "glGetFramebufferAttachmentParameteriv");
+    glGenerateMipmap = (_glGenerateMipmap) qt_gl_getProcAddressEXT(ctx, "glGenerateMipmap");
+
+    return glIsRenderbuffer != 0;
+#else
+    return true;
+#endif
+}
+
+#if !defined(QT_OPENGL_ES_2)
+bool qt_resolve_version_1_3_functions(QGLContext *ctx)
+{
+    if (glMultiTexCoord4f != 0)
+        return true;
+
+    QGLContext cx(QGLFormat::defaultFormat());
+    glMultiTexCoord4f = (_glMultiTexCoord4f) ctx->getProcAddress(QLatin1String("glMultiTexCoord4f"));
+
+    glActiveTexture = (_glActiveTexture) ctx->getProcAddress(QLatin1String("glActiveTexture"));
+    return glMultiTexCoord4f && glActiveTexture;
+}
+#endif
+
+#if !defined(QT_OPENGL_ES_2)
+bool qt_resolve_stencil_face_extension(QGLContext *ctx)
+{
+    if (glActiveStencilFaceEXT != 0)
+        return true;
+
+    QGLContext cx(QGLFormat::defaultFormat());
+    glActiveStencilFaceEXT = (_glActiveStencilFaceEXT) ctx->getProcAddress(QLatin1String("glActiveStencilFaceEXT"));
+
+    return glActiveStencilFaceEXT;
+}
+#endif
+
+
+#if !defined(QT_OPENGL_ES_2)
+bool qt_resolve_frag_program_extensions(QGLContext *ctx)
+{
+    if (glProgramStringARB != 0)
+        return true;
+
+    // ARB_fragment_program
+    glProgramStringARB = (_glProgramStringARB) ctx->getProcAddress(QLatin1String("glProgramStringARB"));
+    glBindProgramARB = (_glBindProgramARB) ctx->getProcAddress(QLatin1String("glBindProgramARB"));
+    glDeleteProgramsARB = (_glDeleteProgramsARB) ctx->getProcAddress(QLatin1String("glDeleteProgramsARB"));
+    glGenProgramsARB = (_glGenProgramsARB) ctx->getProcAddress(QLatin1String("glGenProgramsARB"));
+    glProgramLocalParameter4fvARB = (_glProgramLocalParameter4fvARB) ctx->getProcAddress(QLatin1String("glProgramLocalParameter4fvARB"));
+
+    return glProgramStringARB
+        && glBindProgramARB
+        && glDeleteProgramsARB
+        && glGenProgramsARB
+        && glProgramLocalParameter4fvARB;
+}
+#endif
+
+
+bool qt_resolve_buffer_extensions(QGLContext *ctx)
+{
+#if defined(QGL_RESOLVE_BUFFER_FUNCS)
+    if (glBindBuffer && glDeleteBuffers && glGenBuffers && glBufferData
+            && glBufferSubData && glGetBufferParameteriv)
+        return true;
+#endif
+
+#if defined(QGL_RESOLVE_BUFFER_FUNCS)
+    glBindBuffer = (_glBindBuffer) qt_gl_getProcAddressARB(ctx, "glBindBuffer");
+    glDeleteBuffers = (_glDeleteBuffers) qt_gl_getProcAddressARB(ctx, "glDeleteBuffers");
+    glGenBuffers = (_glGenBuffers) qt_gl_getProcAddressARB(ctx, "glGenBuffers");
+    glBufferData = (_glBufferData) qt_gl_getProcAddressARB(ctx, "glBufferData");
+    glBufferSubData = (_glBufferSubData) qt_gl_getProcAddressARB(ctx, "glBufferSubData");
+    glGetBufferSubData = (_glGetBufferSubData) qt_gl_getProcAddressARB(ctx, "glGetBufferSubData");
+    glGetBufferParameteriv = (_glGetBufferParameteriv) qt_gl_getProcAddressARB(ctx, "glGetBufferParameteriv");
+#endif
+    glMapBufferARB = (_glMapBufferARB) qt_gl_getProcAddressARB(ctx, "glMapBuffer");
+    glUnmapBufferARB = (_glUnmapBufferARB) qt_gl_getProcAddressARB(ctx, "glUnmapBuffer");
+
+#if defined(QGL_RESOLVE_BUFFER_FUNCS)
+    return glBindBuffer
+        && glDeleteBuffers
+        && glGenBuffers
+        && glBufferData
+        && glBufferSubData
+        && glGetBufferParameteriv;
+        // glGetBufferSubData() is optional
+#else
+    return true;
+#endif
+}
+
+#ifndef QT_NO_EGL
+bool qt_resolve_eglimage_gl_extensions(QGLContext *ctx)
+{
+    if (glEGLImageTargetTexture2DOES || glEGLImageTargetRenderbufferStorageOES)
+        return true;
+    glEGLImageTargetTexture2DOES = (_glEGLImageTargetTexture2DOES) ctx->getProcAddress(QLatin1String("glEGLImageTargetTexture2DOES"));
+    glEGLImageTargetRenderbufferStorageOES = (_glEGLImageTargetRenderbufferStorageOES) ctx->getProcAddress(QLatin1String("glEGLImageTargetRenderbufferStorageOES"));
+    return glEGLImageTargetTexture2DOES && glEGLImageTargetRenderbufferStorageOES;
+}
+#endif
+
+bool qt_resolve_glsl_extensions(QGLContext *ctx)
+{
+
+#if defined(QT_OPENGL_ES_2)
+    // The GLSL shader functions are always present in OpenGL/ES 2.0.
+    // The only exceptions are glGetProgramBinaryOES and glProgramBinaryOES.
+    if (!QGLContextPrivate::extensionFuncs(ctx).qt_glslResolved) {
+        glGetProgramBinaryOES = (_glGetProgramBinaryOES) ctx->getProcAddress(QLatin1String("glGetProgramBinaryOES"));
+        glProgramBinaryOES = (_glProgramBinaryOES) ctx->getProcAddress(QLatin1String("glProgramBinaryOES"));
+        QGLContextPrivate::extensionFuncs(ctx).qt_glslResolved = true;
+    }
+    return true;
+#else
+    if (glCreateShader)
+        return true;
+
+    // Geometry shaders are optional...
+    glProgramParameteriEXT = (_glProgramParameteriEXT) ctx->getProcAddress(QLatin1String("glProgramParameteriEXT"));
+    glFramebufferTextureEXT = (_glFramebufferTextureEXT) ctx->getProcAddress(QLatin1String("glFramebufferTextureEXT"));
+    glFramebufferTextureLayerEXT = (_glFramebufferTextureLayerEXT) ctx->getProcAddress(QLatin1String("glFramebufferTextureLayerEXT"));
+    glFramebufferTextureFaceEXT = (_glFramebufferTextureFaceEXT) ctx->getProcAddress(QLatin1String("glFramebufferTextureFaceEXT"));
+
+    // Must at least have the FragmentShader extension to continue.
+    if (!(QGLExtensions::glExtensions() & QGLExtensions::FragmentShader))
+        return false;
+
+    glCreateShader = (_glCreateShader) ctx->getProcAddress(QLatin1String("glCreateShader"));
+    if (glCreateShader) {
+        glShaderSource = (_glShaderSource) ctx->getProcAddress(QLatin1String("glShaderSource"));
+        glShaderBinary = (_glShaderBinary) ctx->getProcAddress(QLatin1String("glShaderBinary"));
+        glCompileShader = (_glCompileShader) ctx->getProcAddress(QLatin1String("glCompileShader"));
+        glDeleteShader = (_glDeleteShader) ctx->getProcAddress(QLatin1String("glDeleteShader"));
+        glIsShader = (_glIsShader) ctx->getProcAddress(QLatin1String("glIsShader"));
+
+        glCreateProgram = (_glCreateProgram) ctx->getProcAddress(QLatin1String("glCreateProgram"));
+        glAttachShader = (_glAttachShader) ctx->getProcAddress(QLatin1String("glAttachShader"));
+        glDetachShader = (_glDetachShader) ctx->getProcAddress(QLatin1String("glDetachShader"));
+        glLinkProgram = (_glLinkProgram) ctx->getProcAddress(QLatin1String("glLinkProgram"));
+        glUseProgram = (_glUseProgram) ctx->getProcAddress(QLatin1String("glUseProgram"));
+        glDeleteProgram = (_glDeleteProgram) ctx->getProcAddress(QLatin1String("glDeleteProgram"));
+        glIsProgram = (_glIsProgram) ctx->getProcAddress(QLatin1String("glIsProgram"));
+
+        glGetShaderInfoLog = (_glGetShaderInfoLog) ctx->getProcAddress(QLatin1String("glGetShaderInfoLog"));
+        glGetShaderiv = (_glGetShaderiv) ctx->getProcAddress(QLatin1String("glGetShaderiv"));
+        glGetShaderSource = (_glGetShaderSource) ctx->getProcAddress(QLatin1String("glGetShaderSource"));
+        glGetProgramiv = (_glGetProgramiv) ctx->getProcAddress(QLatin1String("glGetProgramiv"));
+        glGetProgramInfoLog = (_glGetProgramInfoLog) ctx->getProcAddress(QLatin1String("glGetProgramInfoLog"));
+
+        glGetUniformLocation = (_glGetUniformLocation) ctx->getProcAddress(QLatin1String("glGetUniformLocation"));
+        glUniform4fv = (_glUniform4fv) ctx->getProcAddress(QLatin1String("glUniform4fv"));
+        glUniform3fv = (_glUniform3fv) ctx->getProcAddress(QLatin1String("glUniform3fv"));
+        glUniform2fv = (_glUniform2fv) ctx->getProcAddress(QLatin1String("glUniform2fv"));
+        glUniform1fv = (_glUniform1fv) ctx->getProcAddress(QLatin1String("glUniform1fv"));
+        glUniform1i = (_glUniform1i) ctx->getProcAddress(QLatin1String("glUniform1i"));
+        glUniform1iv = (_glUniform1iv) ctx->getProcAddress(QLatin1String("glUniform1iv"));
+        glUniformMatrix2fv = (_glUniformMatrix2fv) ctx->getProcAddress(QLatin1String("glUniformMatrix2fv"));
+        glUniformMatrix3fv = (_glUniformMatrix3fv) ctx->getProcAddress(QLatin1String("glUniformMatrix3fv"));
+        glUniformMatrix4fv = (_glUniformMatrix4fv) ctx->getProcAddress(QLatin1String("glUniformMatrix4fv"));
+        glUniformMatrix2x3fv = (_glUniformMatrix2x3fv) ctx->getProcAddress(QLatin1String("glUniformMatrix2x3fv"));
+        glUniformMatrix2x4fv = (_glUniformMatrix2x4fv) ctx->getProcAddress(QLatin1String("glUniformMatrix2x4fv"));
+        glUniformMatrix3x2fv = (_glUniformMatrix3x2fv) ctx->getProcAddress(QLatin1String("glUniformMatrix3x2fv"));
+        glUniformMatrix3x4fv = (_glUniformMatrix3x4fv) ctx->getProcAddress(QLatin1String("glUniformMatrix3x4fv"));
+        glUniformMatrix4x2fv = (_glUniformMatrix4x2fv) ctx->getProcAddress(QLatin1String("glUniformMatrix4x2fv"));
+        glUniformMatrix4x3fv = (_glUniformMatrix4x3fv) ctx->getProcAddress(QLatin1String("glUniformMatrix4x3fv"));
+
+        glBindAttribLocation = (_glBindAttribLocation) ctx->getProcAddress(QLatin1String("glBindAttribLocation"));
+        glGetAttribLocation = (_glGetAttribLocation) ctx->getProcAddress(QLatin1String("glGetAttribLocation"));
+        glVertexAttrib1fv = (_glVertexAttrib1fv) ctx->getProcAddress(QLatin1String("glVertexAttrib1fv"));
+        glVertexAttrib2fv = (_glVertexAttrib2fv) ctx->getProcAddress(QLatin1String("glVertexAttrib2fv"));
+        glVertexAttrib3fv = (_glVertexAttrib3fv) ctx->getProcAddress(QLatin1String("glVertexAttrib3fv"));
+        glVertexAttrib4fv = (_glVertexAttrib4fv) ctx->getProcAddress(QLatin1String("glVertexAttrib4fv"));
+        glVertexAttribPointer = (_glVertexAttribPointer) ctx->getProcAddress(QLatin1String("glVertexAttribPointer"));
+        glDisableVertexAttribArray = (_glDisableVertexAttribArray) ctx->getProcAddress(QLatin1String("glDisableVertexAttribArray"));
+        glEnableVertexAttribArray = (_glEnableVertexAttribArray) ctx->getProcAddress(QLatin1String("glEnableVertexAttribArray"));
+
+    } else {
+        // We may not have the standard shader functions, but we might
+        // have the older ARB functions instead.
+        glCreateShader = (_glCreateShader) ctx->getProcAddress(QLatin1String("glCreateShaderObjectARB"));
+        glShaderSource = (_glShaderSource) ctx->getProcAddress(QLatin1String("glShaderSourceARB"));
+        glShaderBinary = (_glShaderBinary) ctx->getProcAddress(QLatin1String("glShaderBinaryARB"));
+        glCompileShader = (_glCompileShader) ctx->getProcAddress(QLatin1String("glCompileShaderARB"));
+        glDeleteShader = (_glDeleteShader) ctx->getProcAddress(QLatin1String("glDeleteObjectARB"));
+        glIsShader = 0;
+
+        glCreateProgram = (_glCreateProgram) ctx->getProcAddress(QLatin1String("glCreateProgramObjectARB"));
+        glAttachShader = (_glAttachShader) ctx->getProcAddress(QLatin1String("glAttachObjectARB"));
+        glDetachShader = (_glDetachShader) ctx->getProcAddress(QLatin1String("glDetachObjectARB"));
+        glLinkProgram = (_glLinkProgram) ctx->getProcAddress(QLatin1String("glLinkProgramARB"));
+        glUseProgram = (_glUseProgram) ctx->getProcAddress(QLatin1String("glUseProgramObjectARB"));
+        glDeleteProgram = (_glDeleteProgram) ctx->getProcAddress(QLatin1String("glDeleteObjectARB"));
+        glIsProgram = 0;
+
+        glGetShaderInfoLog = (_glGetShaderInfoLog) ctx->getProcAddress(QLatin1String("glGetInfoLogARB"));
+        glGetShaderiv = (_glGetShaderiv) ctx->getProcAddress(QLatin1String("glGetObjectParameterivARB"));
+        glGetShaderSource = (_glGetShaderSource) ctx->getProcAddress(QLatin1String("glGetShaderSourceARB"));
+        glGetProgramiv = (_glGetProgramiv) ctx->getProcAddress(QLatin1String("glGetObjectParameterivARB"));
+        glGetProgramInfoLog = (_glGetProgramInfoLog) ctx->getProcAddress(QLatin1String("glGetInfoLogARB"));
+
+        glGetUniformLocation = (_glGetUniformLocation) ctx->getProcAddress(QLatin1String("glGetUniformLocationARB"));
+        glUniform4fv = (_glUniform4fv) ctx->getProcAddress(QLatin1String("glUniform4fvARB"));
+        glUniform3fv = (_glUniform3fv) ctx->getProcAddress(QLatin1String("glUniform3fvARB"));
+        glUniform2fv = (_glUniform2fv) ctx->getProcAddress(QLatin1String("glUniform2fvARB"));
+        glUniform1fv = (_glUniform1fv) ctx->getProcAddress(QLatin1String("glUniform1fvARB"));
+        glUniform1i = (_glUniform1i) ctx->getProcAddress(QLatin1String("glUniform1iARB"));
+        glUniform1iv = (_glUniform1iv) ctx->getProcAddress(QLatin1String("glUniform1ivARB"));
+        glUniformMatrix2fv = (_glUniformMatrix2fv) ctx->getProcAddress(QLatin1String("glUniformMatrix2fvARB"));
+        glUniformMatrix3fv = (_glUniformMatrix3fv) ctx->getProcAddress(QLatin1String("glUniformMatrix3fvARB"));
+        glUniformMatrix4fv = (_glUniformMatrix4fv) ctx->getProcAddress(QLatin1String("glUniformMatrix4fvARB"));
+        glUniformMatrix2x3fv = (_glUniformMatrix2x3fv) ctx->getProcAddress(QLatin1String("glUniformMatrix2x3fvARB"));
+        glUniformMatrix2x4fv = (_glUniformMatrix2x4fv) ctx->getProcAddress(QLatin1String("glUniformMatrix2x4fvARB"));
+        glUniformMatrix3x2fv = (_glUniformMatrix3x2fv) ctx->getProcAddress(QLatin1String("glUniformMatrix3x2fvARB"));
+        glUniformMatrix3x4fv = (_glUniformMatrix3x4fv) ctx->getProcAddress(QLatin1String("glUniformMatrix3x4fvARB"));
+        glUniformMatrix4x2fv = (_glUniformMatrix4x2fv) ctx->getProcAddress(QLatin1String("glUniformMatrix4x2fvARB"));
+        glUniformMatrix4x3fv = (_glUniformMatrix4x3fv) ctx->getProcAddress(QLatin1String("glUniformMatrix4x3fvARB"));
+
+        glBindAttribLocation = (_glBindAttribLocation) ctx->getProcAddress(QLatin1String("glBindAttribLocationARB"));
+        glGetAttribLocation = (_glGetAttribLocation) ctx->getProcAddress(QLatin1String("glGetAttribLocationARB"));
+        glVertexAttrib1fv = (_glVertexAttrib1fv) ctx->getProcAddress(QLatin1String("glVertexAttrib1fvARB"));
+        glVertexAttrib2fv = (_glVertexAttrib2fv) ctx->getProcAddress(QLatin1String("glVertexAttrib2fvARB"));
+        glVertexAttrib3fv = (_glVertexAttrib3fv) ctx->getProcAddress(QLatin1String("glVertexAttrib3fvARB"));
+        glVertexAttrib4fv = (_glVertexAttrib4fv) ctx->getProcAddress(QLatin1String("glVertexAttrib4fvARB"));
+        glVertexAttribPointer = (_glVertexAttribPointer) ctx->getProcAddress(QLatin1String("glVertexAttribPointerARB"));
+        glDisableVertexAttribArray = (_glDisableVertexAttribArray) ctx->getProcAddress(QLatin1String("glDisableVertexAttribArrayARB"));
+        glEnableVertexAttribArray = (_glEnableVertexAttribArray) ctx->getProcAddress(QLatin1String("glEnableVertexAttribArrayARB"));
+    }
+
+    // Note: glShaderBinary(), glIsShader(), glIsProgram(), and
+    // glUniformMatrixNxMfv() are optional, but all other functions
+    // are required.
+
+    return glCreateShader &&
+        glShaderSource &&
+        glCompileShader &&
+        glDeleteProgram &&
+        glCreateProgram &&
+        glAttachShader &&
+        glDetachShader &&
+        glLinkProgram &&
+        glUseProgram &&
+        glDeleteProgram &&
+        glGetShaderInfoLog &&
+        glGetShaderiv &&
+        glGetShaderSource &&
+        glGetProgramiv &&
+        glGetProgramInfoLog &&
+        glGetUniformLocation &&
+        glUniform1fv &&
+        glUniform2fv &&
+        glUniform3fv &&
+        glUniform4fv &&
+        glUniform1i &&
+        glUniform1iv &&
+        glUniformMatrix2fv &&
+        glUniformMatrix3fv &&
+        glUniformMatrix4fv &&
+        glBindAttribLocation &&
+        glGetAttribLocation &&
+        glVertexAttrib1fv &&
+        glVertexAttrib2fv &&
+        glVertexAttrib3fv &&
+        glVertexAttrib4fv &&
+        glVertexAttribPointer &&
+        glDisableVertexAttribArray &&
+        glEnableVertexAttribArray;
+#endif
+}
+
+#if !defined(QT_OPENGL_ES_2)
+bool qt_resolve_version_2_0_functions(QGLContext *ctx)
+{
+    bool gl2supported = true;
+    if (!qt_resolve_glsl_extensions(ctx))
+        gl2supported = false;
+
+    if (!qt_resolve_version_1_3_functions(ctx))
+        gl2supported = false;
+
+    if (!qt_resolve_framebufferobject_extensions(ctx))
+        gl2supported = false;
+
+    if (glStencilOpSeparate)
+        return gl2supported;
+
+    glBlendColor = (_glBlendColor) ctx->getProcAddress(QLatin1String("glBlendColor"));
+    glStencilOpSeparate = (_glStencilOpSeparate) ctx->getProcAddress(QLatin1String("glStencilOpSeparate"));
+    if (!glBlendColor || !glStencilOpSeparate)
+        gl2supported = false;
+
+    return gl2supported;
+}
+#endif
+
+
+QT_END_NAMESPACE