1'''OpenGL extension ARB.vertex_shader 2 3This module customises the behaviour of the 4OpenGL.raw.GL.ARB.vertex_shader to provide a more 5Python-friendly API 6 7Overview (from the spec) 8 9 This extension adds programmable vertex level processing to OpenGL. The 10 application can write vertex shaders in a high level language as defined 11 in the OpenGL Shading Language specification. The language itself is not 12 discussed here. A vertex shader replaces the transformation, texture 13 coordinate generation and lighting parts of OpenGL, and it also adds 14 texture access at the vertex level. Furthermore, management of vertex 15 shader objects and loading generic attributes are discussed. A vertex 16 shader object, attached to a program object, can be compiled and linked 17 to produce an executable that runs on the vertex processor in OpenGL. 18 This extension also defines how such an executable interacts with the 19 fixed functionality vertex processing of OpenGL 1.4. 20 21The official definition of this extension is available here: 22http://www.opengl.org/registry/specs/ARB/vertex_shader.txt 23''' 24from OpenGL import platform, constant, arrays 25from OpenGL import extensions, wrapper 26import ctypes 27from OpenGL.raw.GL import _types, _glgets 28from OpenGL.raw.GL.ARB.vertex_shader import * 29from OpenGL.raw.GL.ARB.vertex_shader import _EXTENSION_NAME 30 31def glInitVertexShaderARB(): 32 '''Return boolean indicating whether this extension is available''' 33 from OpenGL import extensions 34 return extensions.hasGLExtension( _EXTENSION_NAME ) 35 36glVertexAttrib1fvARB=wrapper.wrapper(glVertexAttrib1fvARB).setInputArraySize( 37 'v', 1 38) 39glVertexAttrib1svARB=wrapper.wrapper(glVertexAttrib1svARB).setInputArraySize( 40 'v', 1 41) 42glVertexAttrib1dvARB=wrapper.wrapper(glVertexAttrib1dvARB).setInputArraySize( 43 'v', 1 44) 45glVertexAttrib2fvARB=wrapper.wrapper(glVertexAttrib2fvARB).setInputArraySize( 46 'v', 2 47) 48glVertexAttrib2svARB=wrapper.wrapper(glVertexAttrib2svARB).setInputArraySize( 49 'v', 2 50) 51glVertexAttrib2dvARB=wrapper.wrapper(glVertexAttrib2dvARB).setInputArraySize( 52 'v', 2 53) 54glVertexAttrib3fvARB=wrapper.wrapper(glVertexAttrib3fvARB).setInputArraySize( 55 'v', 3 56) 57glVertexAttrib3svARB=wrapper.wrapper(glVertexAttrib3svARB).setInputArraySize( 58 'v', 3 59) 60glVertexAttrib3dvARB=wrapper.wrapper(glVertexAttrib3dvARB).setInputArraySize( 61 'v', 3 62) 63glVertexAttrib4fvARB=wrapper.wrapper(glVertexAttrib4fvARB).setInputArraySize( 64 'v', 4 65) 66glVertexAttrib4svARB=wrapper.wrapper(glVertexAttrib4svARB).setInputArraySize( 67 'v', 4 68) 69glVertexAttrib4dvARB=wrapper.wrapper(glVertexAttrib4dvARB).setInputArraySize( 70 'v', 4 71) 72glVertexAttrib4ivARB=wrapper.wrapper(glVertexAttrib4ivARB).setInputArraySize( 73 'v', 4 74) 75glVertexAttrib4bvARB=wrapper.wrapper(glVertexAttrib4bvARB).setInputArraySize( 76 'v', 4 77) 78glVertexAttrib4ubvARB=wrapper.wrapper(glVertexAttrib4ubvARB).setInputArraySize( 79 'v', 4 80) 81glVertexAttrib4usvARB=wrapper.wrapper(glVertexAttrib4usvARB).setInputArraySize( 82 'v', 4 83) 84glVertexAttrib4uivARB=wrapper.wrapper(glVertexAttrib4uivARB).setInputArraySize( 85 'v', 4 86) 87glVertexAttrib4NbvARB=wrapper.wrapper(glVertexAttrib4NbvARB).setInputArraySize( 88 'v', 4 89) 90glVertexAttrib4NsvARB=wrapper.wrapper(glVertexAttrib4NsvARB).setInputArraySize( 91 'v', 4 92) 93glVertexAttrib4NivARB=wrapper.wrapper(glVertexAttrib4NivARB).setInputArraySize( 94 'v', 4 95) 96glVertexAttrib4NubvARB=wrapper.wrapper(glVertexAttrib4NubvARB).setInputArraySize( 97 'v', 4 98) 99glVertexAttrib4NusvARB=wrapper.wrapper(glVertexAttrib4NusvARB).setInputArraySize( 100 'v', 4 101) 102glVertexAttrib4NuivARB=wrapper.wrapper(glVertexAttrib4NuivARB).setInputArraySize( 103 'v', 4 104) 105# INPUT glVertexAttribPointerARB.pointer size not checked against 'size,type,stride' 106glVertexAttribPointerARB=wrapper.wrapper(glVertexAttribPointerARB).setInputArraySize( 107 'pointer', None 108) 109glGetActiveAttribARB=wrapper.wrapper(glGetActiveAttribARB).setOutput( 110 'length',size=(1,),orPassIn=True 111).setOutput( 112 'name',size=lambda x:(x,),pnameArg='maxLength',orPassIn=True 113).setOutput( 114 'size',size=(1,),orPassIn=True 115).setOutput( 116 'type',size=(1,),orPassIn=True 117) 118glGetVertexAttribdvARB=wrapper.wrapper(glGetVertexAttribdvARB).setOutput( 119 'params',size=(4,),orPassIn=True 120) 121glGetVertexAttribfvARB=wrapper.wrapper(glGetVertexAttribfvARB).setOutput( 122 'params',size=(4,),orPassIn=True 123) 124glGetVertexAttribivARB=wrapper.wrapper(glGetVertexAttribivARB).setOutput( 125 'params',size=(4,),orPassIn=True 126) 127glGetVertexAttribPointervARB=wrapper.wrapper(glGetVertexAttribPointervARB).setOutput( 128 'pointer',size=(1,),orPassIn=True 129) 130### END AUTOGENERATED SECTION 131from OpenGL._bytes import bytes, _NULL_8_BYTE, as_8_bit 132from OpenGL.lazywrapper import lazy as _lazy 133from OpenGL.GL.ARB.shader_objects import glGetObjectParameterivARB 134 135@_lazy( glGetActiveAttribARB ) 136def glGetActiveAttribARB(baseOperation, program, index): 137 """Retrieve the name, size and type of the uniform of the index in the program""" 138 max_index = int(glGetObjectParameterivARB( program, GL_OBJECT_ACTIVE_ATTRIBUTES_ARB )) 139 length = int(glGetObjectParameterivARB( program, GL_OBJECT_ACTIVE_ATTRIBUTE_MAX_LENGTH_ARB)) 140 if index < max_index and index >= 0 and length > 0: 141 length,name,size,type = baseOperation( program, index ) 142 if hasattr(name,'tostring'): 143 name = name.tostring().rstrip(b'\000') 144 elif hasattr(name,'value'): 145 name = name.value 146 return name,size,type 147 raise IndexError('index out of range from zero to %i' % (max_index - 1, )) 148 149@_lazy( glGetAttribLocationARB ) 150def glGetAttribLocationARB( baseOperation, program, name ): 151 """Check that name is a string with a null byte at the end of it""" 152 if not name: 153 raise ValueError( """Non-null name required""" ) 154 name = as_8_bit( name ) 155 if name[-1] != _NULL_8_BYTE: 156 name = name + _NULL_8_BYTE 157 return baseOperation( program, name ) 158