dispatch/glproc.py

##########################################################################
#
# Copyright 2010 VMware, Inc.
# All Rights Reserved.
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# of this software and associated documentation files (the "Software"), to deal
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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"""Generated an header, glproc.hpp, which does pretty much what GLEW does, but
covers all the functions we support.
""" 


import sys

from dispatch import Dispatcher
import specs.stdapi as stdapi
from specs.glapi import glapi
from specs.glxapi import glxapi
from specs.wglapi import wglapi
from specs.cglapi import cglapi
from specs.eglapi import eglapi


# See http://www.opengl.org/registry/ABI/
public_symbols = set([
    # GL 1.2 and ARB_multitexture
    "glAccum",
    "glAlphaFunc",
    "glAreTexturesResident",
    "glArrayElement",
    "glBegin",
    "glBindTexture",
    "glBitmap",
    "glBlendFunc",
    "glCallList",
    "glCallLists",
    "glClear",
    "glClearAccum",
    "glClearColor",
    "glClearDepth",
    "glClearIndex",
    "glClearStencil",
    "glClipPlane",
    "glColor3b",
    "glColor3bv",
    "glColor3d",
    "glColor3dv",
    "glColor3f",
    "glColor3fv",
    "glColor3i",
    "glColor3iv",
    "glColor3s",
    "glColor3sv",
    "glColor3ub",
    "glColor3ubv",
    "glColor3ui",
    "glColor3uiv",
    "glColor3us",
    "glColor3usv",
    "glColor4b",
    "glColor4bv",
    "glColor4d",
    "glColor4dv",
    "glColor4f",
    "glColor4fv",
    "glColor4i",
    "glColor4iv",
    "glColor4s",
    "glColor4sv",
    "glColor4ub",
    "glColor4ubv",
    "glColor4ui",
    "glColor4uiv",
    "glColor4us",
    "glColor4usv",
    "glColorMask",
    "glColorMaterial",
    "glColorPointer",
    "glCopyPixels",
    "glCopyTexImage1D",
    "glCopyTexImage2D",
    "glCopyTexSubImage1D",
    "glCopyTexSubImage2D",
    "glCullFace",
    "glDeleteLists",
    "glDeleteTextures",
    "glDepthFunc",
    "glDepthMask",
    "glDepthRange",
    "glDisable",
    "glDisableClientState",
    "glDrawArrays",
    "glDrawBuffer",
    "glDrawElements",
    "glDrawPixels",
    "glEdgeFlag",
    "glEdgeFlagPointer",
    "glEdgeFlagv",
    "glEnable",
    "glEnableClientState",
    "glEnd",
    "glEndList",
    "glEvalCoord1d",
    "glEvalCoord1dv",
    "glEvalCoord1f",
    "glEvalCoord1fv",
    "glEvalCoord2d",
    "glEvalCoord2dv",
    "glEvalCoord2f",
    "glEvalCoord2fv",
    "glEvalMesh1",
    "glEvalMesh2",
    "glEvalPoint1",
    "glEvalPoint2",
    "glFeedbackBuffer",
    "glFinish",
    "glFlush",
    "glFogf",
    "glFogfv",
    "glFogi",
    "glFogiv",
    "glFrontFace",
    "glFrustum",
    "glGenLists",
    "glGenTextures",
    "glGetBooleanv",
    "glGetClipPlane",
    "glGetDoublev",
    "glGetError",
    "glGetFloatv",
    "glGetIntegerv",
    "glGetLightfv",
    "glGetLightiv",
    "glGetMapdv",
    "glGetMapfv",
    "glGetMapiv",
    "glGetMaterialfv",
    "glGetMaterialiv",
    "glGetPixelMapfv",
    "glGetPixelMapuiv",
    "glGetPixelMapusv",
    "glGetPointerv",
    "glGetPolygonStipple",
    "glGetString",
    "glGetTexEnvfv",
    "glGetTexEnviv",
    "glGetTexGendv",
    "glGetTexGenfv",
    "glGetTexGeniv",
    "glGetTexImage",
    "glGetTexLevelParameterfv",
    "glGetTexLevelParameteriv",
    "glGetTexParameterfv",
    "glGetTexParameteriv",
    "glHint",
    "glIndexMask",
    "glIndexPointer",
    "glIndexd",
    "glIndexdv",
    "glIndexf",
    "glIndexfv",
    "glIndexi",
    "glIndexiv",
    "glIndexs",
    "glIndexsv",
    "glIndexub",
    "glIndexubv",
    "glInitNames",
    "glInterleavedArrays",
    "glIsEnabled",
    "glIsList",
    "glIsTexture",
    "glLightModelf",
    "glLightModelfv",
    "glLightModeli",
    "glLightModeliv",
    "glLightf",
    "glLightfv",
    "glLighti",
    "glLightiv",
    "glLineStipple",
    "glLineWidth",
    "glListBase",
    "glLoadIdentity",
    "glLoadMatrixd",
    "glLoadMatrixf",
    "glLoadName",
    "glLogicOp",
    "glMap1d",
    "glMap1f",
    "glMap2d",
    "glMap2f",
    "glMapGrid1d",
    "glMapGrid1f",
    "glMapGrid2d",
    "glMapGrid2f",
    "glMaterialf",
    "glMaterialfv",
    "glMateriali",
    "glMaterialiv",
    "glMatrixMode",
    "glMultMatrixd",
    "glMultMatrixf",
    "glNewList",
    "glNormal3b",
    "glNormal3bv",
    "glNormal3d",
    "glNormal3dv",
    "glNormal3f",
    "glNormal3fv",
    "glNormal3i",
    "glNormal3iv",
    "glNormal3s",
    "glNormal3sv",
    "glNormalPointer",
    "glOrtho",
    "glPassThrough",
    "glPixelMapfv",
    "glPixelMapuiv",
    "glPixelMapusv",
    "glPixelStoref",
    "glPixelStorei",
    "glPixelTransferf",
    "glPixelTransferi",
    "glPixelZoom",
    "glPointSize",
    "glPolygonMode",
    "glPolygonOffset",
    "glPolygonStipple",
    "glPopAttrib",
    "glPopClientAttrib",
    "glPopMatrix",
    "glPopName",
    "glPrioritizeTextures",
    "glPushAttrib",
    "glPushClientAttrib",
    "glPushMatrix",
    "glPushName",
    "glRasterPos2d",
    "glRasterPos2dv",
    "glRasterPos2f",
    "glRasterPos2fv",
    "glRasterPos2i",
    "glRasterPos2iv",
    "glRasterPos2s",
    "glRasterPos2sv",
    "glRasterPos3d",
    "glRasterPos3dv",
    "glRasterPos3f",
    "glRasterPos3fv",
    "glRasterPos3i",
    "glRasterPos3iv",
    "glRasterPos3s",
    "glRasterPos3sv",
    "glRasterPos4d",
    "glRasterPos4dv",
    "glRasterPos4f",
    "glRasterPos4fv",
    "glRasterPos4i",
    "glRasterPos4iv",
    "glRasterPos4s",
    "glRasterPos4sv",
    "glReadBuffer",
    "glReadPixels",
    "glRectd",
    "glRectdv",
    "glRectf",
    "glRectfv",
    "glRecti",
    "glRectiv",
    "glRects",
    "glRectsv",
    "glRenderMode",
    "glRotated",
    "glRotatef",
    "glScaled",
    "glScalef",
    "glScissor",
    "glSelectBuffer",
    "glShadeModel",
    "glStencilFunc",
    "glStencilMask",
    "glStencilOp",
    "glTexCoord1d",
    "glTexCoord1dv",
    "glTexCoord1f",
    "glTexCoord1fv",
    "glTexCoord1i",
    "glTexCoord1iv",
    "glTexCoord1s",
    "glTexCoord1sv",
    "glTexCoord2d",
    "glTexCoord2dv",
    "glTexCoord2f",
    "glTexCoord2fv",
    "glTexCoord2i",
    "glTexCoord2iv",
    "glTexCoord2s",
    "glTexCoord2sv",
    "glTexCoord3d",
    "glTexCoord3dv",
    "glTexCoord3f",
    "glTexCoord3fv",
    "glTexCoord3i",
    "glTexCoord3iv",
    "glTexCoord3s",
    "glTexCoord3sv",
    "glTexCoord4d",
    "glTexCoord4dv",
    "glTexCoord4f",
    "glTexCoord4fv",
    "glTexCoord4i",
    "glTexCoord4iv",
    "glTexCoord4s",
    "glTexCoord4sv",
    "glTexCoordPointer",
    "glTexEnvf",
    "glTexEnvfv",
    "glTexEnvi",
    "glTexEnviv",
    "glTexGend",
    "glTexGendv",
    "glTexGenf",
    "glTexGenfv",
    "glTexGeni",
    "glTexGeniv",
    "glTexImage1D",
    "glTexImage2D",
    "glTexParameterf",
    "glTexParameterfv",
    "glTexParameteri",
    "glTexParameteriv",
    "glTexSubImage1D",
    "glTexSubImage2D",
    "glTranslated",
    "glTranslatef",
    "glVertex2d",
    "glVertex2dv",
    "glVertex2f",
    "glVertex2fv",
    "glVertex2i",
    "glVertex2iv",
    "glVertex2s",
    "glVertex2sv",
    "glVertex3d",
    "glVertex3dv",
    "glVertex3f",
    "glVertex3fv",
    "glVertex3i",
    "glVertex3iv",
    "glVertex3s",
    "glVertex3sv",
    "glVertex4d",
    "glVertex4dv",
    "glVertex4f",
    "glVertex4fv",
    "glVertex4i",
    "glVertex4iv",
    "glVertex4s",
    "glVertex4sv",
    "glVertexPointer",
    "glViewport",

    # GLX 1.3 and GLX_ARB_get_proc_address
    "glXChooseVisual",
    "glXCreateContext",
    "glXDestroyContext",
    "glXMakeCurrent",
    "glXCopyContext",
    "glXSwapBuffers",
    "glXCreateGLXPixmap",
    "glXDestroyGLXPixmap",
    "glXQueryExtension",
    "glXQueryVersion",
    "glXIsDirect",
    "glXGetConfig",
    "glXGetCurrentContext",
    "glXGetCurrentDrawable",
    "glXWaitGL",
    "glXWaitX",
    "glXUseXFont",
    "glXQueryExtensionsString",
    "glXQueryServerString",
    "glXGetClientString",
    "glXGetCurrentDisplay",
    "glXChooseFBConfig",
    "glXGetFBConfigAttrib",
    "glXGetFBConfigs",
    "glXGetVisualFromFBConfig",
    "glXCreateWindow",
    "glXDestroyWindow",
    "glXCreatePixmap",
    "glXDestroyPixmap",
    "glXCreatePbuffer",
    "glXDestroyPbuffer",
    "glXQueryDrawable",
    "glXCreateNewContext",
    "glXMakeContextCurrent",
    "glXGetCurrentReadDrawable",
    "glXQueryContext",
    "glXSelectEvent",
    "glXGetSelectedEvent",
    "glXGetProcAddressARB",
    "glXGetProcAddress",
    
    # WGL
    #"glDebugEntry",
    "wglChoosePixelFormat",
    "wglCopyContext",
    "wglCreateContext",
    "wglCreateLayerContext",
    "wglDeleteContext",
    "wglDescribeLayerPlane",
    "wglDescribePixelFormat",
    "wglGetCurrentContext",
    "wglGetCurrentDC",
    "wglGetDefaultProcAddress",
    "wglGetLayerPaletteEntries",
    "wglGetPixelFormat",
    "wglGetProcAddress",
    "wglMakeCurrent",
    "wglRealizeLayerPalette",
    "wglSetLayerPaletteEntries",
    "wglSetPixelFormat",
    "wglShareLists",
    "wglSwapBuffers",
    "wglSwapLayerBuffers",
    "wglSwapMultipleBuffers",
    "wglUseFontBitmapsA",
    "wglUseFontBitmapsW",
    "wglUseFontOutlinesA",
    "wglUseFontOutlinesW",

])

# EGL 1.4
public_symbols.update([
   "eglBindAPI",
   "eglBindTexImage",
   "eglChooseConfig",
   "eglCopyBuffers",
   "eglCreateContext",
   "eglCreatePbufferFromClientBuffer",
   "eglCreatePbufferSurface",
   "eglCreatePixmapSurface",
   "eglCreateWindowSurface",
   "eglDestroyContext",
   "eglDestroySurface",
   "eglGetConfigAttrib",
   "eglGetConfigs",
   "eglGetCurrentContext",
   "eglGetCurrentDisplay",
   "eglGetCurrentSurface",
   "eglGetDisplay",
   "eglGetError",
   "eglGetProcAddress",
   "eglInitialize",
   "eglMakeCurrent",
   "eglQueryAPI",
   "eglQueryContext",
   "eglQueryString",
   "eglQuerySurface",
   "eglReleaseTexImage",
   "eglReleaseThread",
   "eglSurfaceAttrib",
   "eglSwapBuffers",
   "eglSwapInterval",
   "eglTerminate",
   "eglWaitClient",
   "eglWaitGL",
   "eglWaitNative",
])

class GlDispatcher(Dispatcher):

    def isFunctionPublic(self, module, function):
        return function.name in public_symbols or function.name.startswith('CGL')

    def getProcAddressName(self, module, function):
        if self.isFunctionPublic(module, function):
            return '_getPublicProcAddress'
        else:
            return '_getPrivateProcAddress'

    def failFunction(self, function):
        # Fallback to EXT_debug_label on MacOSX, some enums need to be translated.
        if function.name in ('glObjectLabel', 'glObjectLabelKHR'):
            print(r'#ifdef __APPLE__')
            print(r'    if (translateDebugLabelIdentifier(identifier)) {')
            print(r'        _glLabelObjectEXT(identifier, name, length < 0 ? 0 : length, length == 0 ? "" : label);')
            print(r'        return;')
            print(r'    }')
            print(r'#endif')
        if function.name in ('glGetObjectLabel', 'glGetObjectLabelKHR'):
            print(r'#ifdef __APPLE__')
            print(r'    if (translateDebugLabelIdentifier(identifier)) {')
            print(r'        _glGetObjectLabelEXT(identifier, name, bufSize, length, label);')
            print(r'        return;')
            print(r'    }')
            print(r'#endif')

        # We fake these when they are not available
        if function.name in (
            # GL_KHR_debug
            'glDebugMessageControl',
            'glDebugMessageInsert',
            'glDebugMessageCallback',
            'glPushDebugGroup',
            'glPopDebugGroup',
            'glObjectLabel',
            'glObjectPtrLabel',
            # GL_KHR_debug (OpenGL ES)
            'glDebugMessageControlKHR',
            'glDebugMessageInsertKHR',
            'glDebugMessageCallbackKHR',
            'glPushDebugGroupKHR',
            'glPopDebugGroupKHR',
            'glObjectLabelKHR',
            'glObjectPtrLabelKHR',
            # GL_ARB_debug_output
            'glDebugMessageControlARB',
            'glDebugMessageInsertARB',
            'glDebugMessageCallbackARB',
            # GL_AMD_debug_output
            'glDebugMessageEnableAMD',
            'glDebugMessageInsertAMD',
            'glDebugMessageCallbackAMD',
            # GL_EXT_debug_label
            'glLabelObjectEXT',
            # GL_EXT_debug_marker
            'glInsertEventMarkerEXT',
            'glPushGroupMarkerEXT',
            'glPopGroupMarkerEXT',
        ):
            return
        if function.name.startswith('glGetObjectLabel'):
            print(r'    if (length != 0) *length = 0;')
            print(r'    if (label != 0 && bufSize > 0) *label = 0;')
            return
        if function.name == 'glGetDebugMessageLogAMD':
            print(r'    if (categories != 0) *categories = 0;')
            print(r'    if (ids != 0) *ids = 0;')
            print(r'    if (severities != 0) *severities = 0;')
            print(r'    if (lengths != 0) *lengths = 0;')
            print(r'    if (message != 0 && bufsize > 0) *message = 0;')
            print(r'    return 0;')
            return
        if function.name.startswith('glGetDebugMessageLog'):
            print(r'    if (sources != 0) *sources = 0;')
            print(r'    if (types != 0) *types = 0;')
            print(r'    if (ids != 0) *ids = 0;')
            print(r'    if (severities != 0) *severities = 0;')
            print(r'    if (lengths != 0) *lengths = 0;')
            print(r'    if (messageLog != 0 && bufsize > 0) *messageLog = 0;')
            print(r'    return 0;')
            return

        Dispatcher.failFunction(self, function)


if __name__ == '__main__':
    decl, impl = sys.argv[1:]

    sys.stdout = open(decl, 'wt')
    print()
    print('#pragma once')
    print()
    print('#include "glimports.hpp"')
    print()
    print('#if defined(_WIN32)')
    print('extern HMODULE _libGlHandle;')
    print('#else')
    print('extern void * _libGlHandle;')
    print('#endif')
    print()
    print('void * _getPublicProcAddress(const char *procName);')
    print('void * _getPrivateProcAddress(const char *procName);')
    print()
    dispatcher = GlDispatcher()
    print()
    dispatcher.dispatchModuleDecl(eglapi)
    print()
    print('#if defined(_WIN32)')
    print()
    dispatcher.dispatchModuleDecl(wglapi)
    print()
    print('#elif defined(__APPLE__)')
    print()
    dispatcher.dispatchModuleDecl(cglapi)
    print()
    print('#elif defined(HAVE_X11)')
    print()
    dispatcher.dispatchModuleDecl(glxapi)
    print()
    print('#endif')
    print()
    dispatcher.dispatchModuleDecl(glapi)
    print()

    sys.stdout = open(impl, 'wt')
    print()
    print('#include "glproc.hpp"')
    print('#include "os.hpp"')
    print()
    dispatcher = GlDispatcher()
    print()
    dispatcher.dispatchModuleImpl(eglapi)
    print()
    print('#if defined(_WIN32)')
    print()
    dispatcher.dispatchModuleImpl(wglapi)
    print()
    print('#elif defined(__APPLE__)')
    print()
    print('static inline bool')
    print('translateDebugLabelIdentifier(GLenum & identifier)')
    print('{')
    print('    switch (identifier) {')
    print('    case GL_TEXTURE:')
    print('    case GL_FRAMEBUFFER:')
    print('    case GL_RENDERBUFFER:')
    print('    case GL_SAMPLER:')
    print('    case GL_TRANSFORM_FEEDBACK:')
    print('       return true;')
    print('    case GL_BUFFER:')
    print('       identifier = GL_BUFFER_OBJECT_EXT;')
    print('       return true;')
    print('    case GL_SHADER:')
    print('       identifier = GL_SHADER_OBJECT_EXT;')
    print('       return true;')
    print('    case GL_PROGRAM:')
    print('       identifier = GL_PROGRAM_OBJECT_EXT;')
    print('       return true;')
    print('    case GL_VERTEX_ARRAY:')
    print('       identifier = GL_VERTEX_ARRAY_OBJECT_EXT;')
    print('       return true;')
    print('    case GL_QUERY:')
    print('       identifier = GL_QUERY_OBJECT_EXT;')
    print('       return true;')
    print('    case GL_PROGRAM_PIPELINE:')
    print('       identifier = GL_PROGRAM_PIPELINE_OBJECT_EXT;')
    print('       return true;')
    print('    default:')
    print('       return false;')
    print('    }')
    print('}')
    print()
    dispatcher.dispatchModuleImpl(cglapi)
    print()
    print('#elif defined(HAVE_X11)')
    print()
    dispatcher.dispatchModuleImpl(glxapi)
    print()
    print('#endif')
    print()
    dispatcher.dispatchModuleImpl(glapi)
    print()