dispatch/glproc.py

##########################################################################
#
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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):
        # We fake these when they are not available
        if sys.platform == 'darwin':
            # Fallback to EXT_debug_label on MacOSX, some enums need to be translated.
            if function.name == 'glObjectLabel':
                print r'    if (translateDebugLabelIdentifier(identifier)) {'
                print r'        _glLabelObjectEXT(identifier, name, length < 0 ? 0 : length, length == 0 ? "" : label);'
                print r'        return;'
                print r'    }'
            if function.name == 'glGetObjectLabel':
                print r'    if (translateDebugLabelIdentifier(identifier)) {'
                print r'        _glGetObjectLabelEXT(identifier, name, bufSize, length, label);'
                print r'        return;'
                print r'    }'
        if function.name in (
            # GL_KHR_debug
            'glDebugMessageControl',
            'glDebugMessageInsert',
            'glDebugMessageCallback',
            'glPushDebugGroup',
            'glPopDebugGroup',
            'glObjectLabel',
            'glObjectPtrLabel',
            # 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 in ('glGetObjectLabel', 'glGetObjectPtrLabel', 'glGetObjectLabelEXT'):
            print r'    if (length != 0) *length = 0;'
            print r'    if (label != 0 && bufSize > 0) *label = 0;'
            return
        if function.name in ('glGetDebugMessageLog', 'glGetDebugMessageLogARB'):
            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
        if function.name in ('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

        Dispatcher.failFunction(self, function)


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

    sys.stdout = open(decl, 'wt')
    print
    print '#ifndef _GLPROC_HPP_'
    print '#define _GLPROC_HPP_'
    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
    print '#endif /* !_GLPROC_HPP_ */'
    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