2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 * Vertex and fragment program support functions.
33 * \mainpage Mesa vertex and fragment program module
35 * This module or directory contains most of the code for vertex and
36 * fragment programs and shaders, including state management, parsers,
37 * and (some) software routines for executing programs
46 /* for GL_ARB_v_p and GL_ARB_f_p SWZ instruction */
51 #define SWIZZLE_ZERO 4 /* keep these values together: KW */
52 #define SWIZZLE_ONE 5 /* keep these values together: KW */
54 #define MAKE_SWIZZLE4(a,b,c,d) (((a)<<0) | ((b)<<3) | ((c)<<6) | ((d)<<9))
55 #define SWIZZLE_NOOP MAKE_SWIZZLE4(0,1,2,3)
56 #define GET_SWZ(swz, idx) (((swz) >> ((idx)*3)) & 0x7)
57 #define GET_BIT(msk, idx) (((msk) >> (idx)) & 0x1)
60 #define WRITEMASK_X 0x1
61 #define WRITEMASK_Y 0x2
62 #define WRITEMASK_XY 0x3
63 #define WRITEMASK_Z 0x4
64 #define WRITEMASK_XZ 0x5
65 #define WRITEMASK_YZ 0x6
66 #define WRITEMASK_XYZ 0x7
67 #define WRITEMASK_W 0x8
68 #define WRITEMASK_XW 0x9
69 #define WRITEMASK_YW 0xa
70 #define WRITEMASK_XYW 0xb
71 #define WRITEMASK_ZW 0xc
72 #define WRITEMASK_XZW 0xd
73 #define WRITEMASK_YZW 0xe
74 #define WRITEMASK_XYZW 0xf
77 extern struct program _mesa_DummyProgram
;
85 _mesa_init_program(GLcontext
*ctx
);
88 _mesa_free_program_data(GLcontext
*ctx
);
91 _mesa_set_program_error(GLcontext
*ctx
, GLint pos
, const char *string
);
93 extern const GLubyte
*
94 _mesa_find_line_column(const GLubyte
*string
, const GLubyte
*pos
,
95 GLint
*line
, GLint
*col
);
98 extern struct program
*
99 _mesa_init_vertex_program(GLcontext
*ctx
,
100 struct vertex_program
*prog
,
101 GLenum target
, GLuint id
);
103 extern struct program
*
104 _mesa_init_fragment_program(GLcontext
*ctx
,
105 struct fragment_program
*prog
,
106 GLenum target
, GLuint id
);
108 extern struct program
*
109 _mesa_new_program(GLcontext
*ctx
, GLenum target
, GLuint id
);
112 _mesa_delete_program(GLcontext
*ctx
, struct program
*prog
);
117 * Used for describing GL state referenced from inside ARB vertex and
119 * A string such as "state.light[0].ambient" gets translated into a
120 * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
126 STATE_LIGHTMODEL_AMBIENT
,
127 STATE_LIGHTMODEL_SCENECOLOR
,
138 STATE_POINT_ATTENUATION
,
146 STATE_MATRIX_INVERSE
,
147 STATE_MATRIX_TRANSPOSE
,
148 STATE_MATRIX_INVTRANS
,
159 STATE_SPOT_DIRECTION
,
165 STATE_TEXGEN_OBJECT_S
,
166 STATE_TEXGEN_OBJECT_T
,
167 STATE_TEXGEN_OBJECT_R
,
168 STATE_TEXGEN_OBJECT_Q
,
174 STATE_VERTEX_PROGRAM
,
175 STATE_FRAGMENT_PROGRAM
,
180 STATE_INTERNAL
, /* Mesa additions */
182 STATE_POSITION_NORMALIZED
/* normalized light position */
188 * Named program parameters
189 * Used for NV_fragment_program "DEFINE"d constants and "DECLARE"d parameters,
190 * and ARB_fragment_program global state references. For the later, Name
191 * might be "state.light[0].diffuse", for example.
193 struct program_parameter
195 const char *Name
; /**< Null-terminated string */
196 enum register_file Type
; /**< PROGRAM_NAMED_PARAM, CONSTANT or STATE_VAR */
197 enum state_index StateIndexes
[6]; /**< Global state reference */
202 * A list of the above program_parameter instances.
204 struct program_parameter_list
206 GLuint Size
; /**< allocated size of Parameters, ParameterValues */
207 GLuint NumParameters
; /**< number of parameters in arrays */
208 struct program_parameter
*Parameters
; /**< Array [Size] */
209 GLfloat (*ParameterValues
)[4]; /**< Array [Size] of GLfloat[4] */
210 GLbitfield StateFlags
; /**< _NEW_* flags indicating which state changes
211 might invalidate ParameterValues[] */
216 * Program parameter functions
219 extern struct program_parameter_list
*
220 _mesa_new_parameter_list(void);
223 _mesa_free_parameter_list(struct program_parameter_list
*paramList
);
226 _mesa_add_named_parameter(struct program_parameter_list
*paramList
,
227 const char *name
, const GLfloat values
[4]);
230 _mesa_add_named_constant(struct program_parameter_list
*paramList
,
231 const char *name
, const GLfloat values
[4]);
234 _mesa_add_unnamed_constant(struct program_parameter_list
*paramList
,
235 const GLfloat values
[4]);
238 _mesa_add_state_reference(struct program_parameter_list
*paramList
,
239 const GLint
*stateTokens
);
242 _mesa_lookup_parameter_value(struct program_parameter_list
*paramList
,
243 GLsizei nameLen
, const char *name
);
246 _mesa_lookup_parameter_index(struct program_parameter_list
*paramList
,
247 GLsizei nameLen
, const char *name
);
250 _mesa_load_state_parameters(GLcontext
*ctx
,
251 struct program_parameter_list
*paramList
);
256 _mesa_print_instruction(const struct prog_instruction
*inst
);
259 _mesa_print_program(const struct program
*prog
);
262 _mesa_print_program_parameters(GLcontext
*ctx
, const struct program
*prog
);
266 * API functions common to ARB/NV_vertex/fragment_program
269 extern void GLAPIENTRY
270 _mesa_BindProgram(GLenum target
, GLuint id
);
272 extern void GLAPIENTRY
273 _mesa_DeletePrograms(GLsizei n
, const GLuint
*ids
);
275 extern void GLAPIENTRY
276 _mesa_GenPrograms(GLsizei n
, GLuint
*ids
);
278 extern GLboolean GLAPIENTRY
279 _mesa_IsProgram(GLuint id
);
284 * GL_MESA_program_debug
288 _mesa_ProgramCallbackMESA(GLenum target
, GLprogramcallbackMESA callback
,
292 _mesa_GetProgramRegisterfvMESA(GLenum target
, GLsizei len
,
293 const GLubyte
*registerName
, GLfloat
*v
);
296 #endif /* PROGRAM_H */