Changeset 561 for trunk/src/opengl/qglextensions.cpp

Timestamp:

Feb 11, 2010, 11:19:06 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.1 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/opengl/qglextensions.cpp (modified) (8 diffs)

trunk/src/opengl/qglextensions.cpp

@@ -2 +2 @@
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtOpenGL module of the Qt Toolkit.
@@ -21 +22 @@
 ** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
-** package.
+** 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.
 **
 ** GNU General Public License Usage
@@ -34 +34 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
@@ -44 +44 @@
 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)
-    if (glIsRenderbufferEXT != 0)
-        return true;
+#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) {
@@ -56 +108 @@
     }
 
-    glIsRenderbufferEXT = (_glIsRenderbufferEXT) ctx->getProcAddress(QLatin1String("glIsRenderbufferEXT"));
-    glBindRenderbufferEXT = (_glBindRenderbufferEXT) ctx->getProcAddress(QLatin1String("glBindRenderbufferEXT"));
-    glDeleteRenderbuffersEXT = (_glDeleteRenderbuffersEXT) ctx->getProcAddress(QLatin1String("glDeleteRenderbuffersEXT"));
-    glGenRenderbuffersEXT = (_glGenRenderbuffersEXT) ctx->getProcAddress(QLatin1String("glGenRenderbuffersEXT"));
-    glRenderbufferStorageEXT = (_glRenderbufferStorageEXT) ctx->getProcAddress(QLatin1String("glRenderbufferStorageEXT"));
-    glGetRenderbufferParameterivEXT =
-        (_glGetRenderbufferParameterivEXT) ctx->getProcAddress(QLatin1String("glGetRenderbufferParameterivEXT"));
-    glIsFramebufferEXT = (_glIsFramebufferEXT) ctx->getProcAddress(QLatin1String("glIsFramebufferEXT"));
-    glBindFramebufferEXT = (_glBindFramebufferEXT) ctx->getProcAddress(QLatin1String("glBindFramebufferEXT"));
-    glDeleteFramebuffersEXT = (_glDeleteFramebuffersEXT) ctx->getProcAddress(QLatin1String("glDeleteFramebuffersEXT"));
-    glGenFramebuffersEXT = (_glGenFramebuffersEXT) ctx->getProcAddress(QLatin1String("glGenFramebuffersEXT"));
-    glCheckFramebufferStatusEXT = (_glCheckFramebufferStatusEXT) ctx->getProcAddress(QLatin1String("glCheckFramebufferStatusEXT"));
-    glFramebufferTexture1DEXT = (_glFramebufferTexture1DEXT) ctx->getProcAddress(QLatin1String("glFramebufferTexture1DEXT"));
-    glFramebufferTexture2DEXT = (_glFramebufferTexture2DEXT) ctx->getProcAddress(QLatin1String("glFramebufferTexture2DEXT"));
-    glFramebufferTexture3DEXT = (_glFramebufferTexture3DEXT) ctx->getProcAddress(QLatin1String("glFramebufferTexture3DEXT"));
-    glFramebufferRenderbufferEXT = (_glFramebufferRenderbufferEXT) ctx->getProcAddress(QLatin1String("glFramebufferRenderbufferEXT"));
-    glGetFramebufferAttachmentParameterivEXT =
-        (_glGetFramebufferAttachmentParameterivEXT) ctx->getProcAddress(QLatin1String("glGetFramebufferAttachmentParameterivEXT"));
-    glGenerateMipmapEXT = (_glGenerateMipmapEXT) ctx->getProcAddress(QLatin1String("glGenerateMipmapEXT"));
-    return glIsRenderbufferEXT;
+
+    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
-    Q_UNUSED(ctx);
     return true;
 #endif
 }
 
+#if !defined(QT_OPENGL_ES_2)
 bool qt_resolve_version_1_3_functions(QGLContext *ctx)
 {
@@ -90 +149 @@
     glMultiTexCoord4f = (_glMultiTexCoord4f) ctx->getProcAddress(QLatin1String("glMultiTexCoord4f"));
 
-#if defined(QT_OPENGL_ES_2)
-    return glMultiTexCoord4f;
-#else
     glActiveTexture = (_glActiveTexture) ctx->getProcAddress(QLatin1String("glActiveTexture"));
     return glMultiTexCoord4f && glActiveTexture;
-#endif
-}
-
+}
+#endif
+
+#if !defined(QT_OPENGL_ES_2)
 bool qt_resolve_stencil_face_extension(QGLContext *ctx)
 {
@@ -108 +165 @@
     return glActiveStencilFaceEXT;
 }
-
+#endif
+
+
+#if !defined(QT_OPENGL_ES_2)
 bool qt_resolve_frag_program_extensions(QGLContext *ctx)
 {
@@ -127 +187 @@
         && glProgramLocalParameter4fvARB;
 }
+#endif
+
 
 bool qt_resolve_buffer_extensions(QGLContext *ctx)
 {
-    if (glBindBufferARB && glDeleteBuffersARB && glGenBuffersARB && glBufferDataARB
-        && glMapBufferARB && glUnmapBufferARB)
-        return true;
-
-    glBindBufferARB = (_glBindBufferARB) ctx->getProcAddress(QLatin1String("glBindBufferARB"));
-    glDeleteBuffersARB = (_glDeleteBuffersARB) ctx->getProcAddress(QLatin1String("glDeleteBuffersARB"));
-    glGenBuffersARB = (_glGenBuffersARB) ctx->getProcAddress(QLatin1String("glGenBuffersARB"));
-    glBufferDataARB = (_glBufferDataARB) ctx->getProcAddress(QLatin1String("glBufferDataARB"));
-    glMapBufferARB = (_glMapBufferARB) ctx->getProcAddress(QLatin1String("glMapBufferARB"));
-    glUnmapBufferARB = (_glUnmapBufferARB) ctx->getProcAddress(QLatin1String("glUnmapBufferARB"));
-
-    return glBindBufferARB
-        && glDeleteBuffersARB
-        && glGenBuffersARB
-        && glBufferDataARB
-        && glMapBufferARB
-        && glUnmapBufferARB;
+    if (glMapBufferARB && glUnmapBufferARB
+#if !defined(QT_OPENGL_ES_2)
+        && glBindBuffer && glDeleteBuffers && glGenBuffers && glBufferData
+#endif
+        )
+        return true;
+
+#if !defined(QT_OPENGL_ES_2)
+    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");
+#endif
+    glMapBufferARB = (_glMapBufferARB) qt_gl_getProcAddressARB(ctx, "glMapBuffer");
+    glUnmapBufferARB = (_glUnmapBufferARB) qt_gl_getProcAddressARB(ctx, "glUnmapBuffer");
+
+    return glMapBufferARB
+        && glUnmapBufferARB
+#if !defined(QT_OPENGL_ES_2)
+        && glBindBuffer
+        && glDeleteBuffers
+        && glGenBuffers
+        && glBufferData
+#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;
 
     glCreateShader = (_glCreateShader) ctx->getProcAddress(QLatin1String("glCreateShader"));
-    glShaderSource = (_glShaderSource) ctx->getProcAddress(QLatin1String("glShaderSource"));
-    glCompileShader = (_glCompileShader) ctx->getProcAddress(QLatin1String("glCompileShader"));
-    glDeleteShader = (_glDeleteShader) ctx->getProcAddress(QLatin1String("glDeleteShader"));
-
-    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"));
-
-    glGetShaderInfoLog = (_glGetShaderInfoLog) ctx->getProcAddress(QLatin1String("glGetShaderInfoLog"));
-    glGetShaderiv = (_glGetShaderiv) ctx->getProcAddress(QLatin1String("glGetShaderiv"));
-    glGetProgramiv = (_glGetProgramiv) ctx->getProcAddress(QLatin1String("glGetProgramiv"));
-
-    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"));
-
-    return glCreateShader && glShaderSource && glCompileShader && glDeleteProgram &&
-        glCreateProgram && glAttachShader && glDetachShader && glLinkProgram && glUseProgram &&
-        glDeleteProgram && glGetShaderInfoLog && glGetShaderiv && glGetProgramiv && glGetUniformLocation &&
-        glUniform1i && glUniform1fv && glUniform2fv && glUniform3fv && glUniform4fv;
-}
+    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