arbprogparse.c revision 848b8605 
1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#define DEBUG_PARSING 0
26
27/**
28 * \file arbprogparse.c
29 * ARB_*_program parser core
30 * \author Karl Rasche
31 */
32
33/**
34Notes on program parameters, etc.
35
36The instructions we emit will use six kinds of source registers:
37
38  PROGRAM_INPUT      - input registers
39  PROGRAM_TEMPORARY  - temp registers
40  PROGRAM_ADDRESS    - address/indirect register
41  PROGRAM_SAMPLER    - texture sampler
42  PROGRAM_CONSTANT   - indexes into program->Parameters, a known constant/literal
43  PROGRAM_STATE_VAR  - indexes into program->Parameters, and may actually be:
44                       + a state variable, like "state.fog.color", or
45                       + a pointer to a "program.local[k]" parameter, or
46                       + a pointer to a "program.env[k]" parameter
47
48Basically, all the program.local[] and program.env[] values will get mapped
49into the unified gl_program->Parameters array.  This solves the problem of
50having three separate program parameter arrays.
51*/
52
53
54#include "main/glheader.h"
55#include "main/imports.h"
56#include "main/context.h"
57#include "main/mtypes.h"
58#include "arbprogparse.h"
59#include "programopt.h"
60#include "prog_parameter.h"
61#include "prog_statevars.h"
62#include "prog_instruction.h"
63#include "prog_optimize.h"
64#include "program_parser.h"
65
66
67void
68_mesa_parse_arb_fragment_program(struct gl_context* ctx, GLenum target,
69                                 const GLvoid *str, GLsizei len,
70                                 struct gl_fragment_program *program)
71{
72   struct gl_program prog;
73   struct asm_parser_state state;
74   GLuint i;
75
76   ASSERT(target == GL_FRAGMENT_PROGRAM_ARB);
77
78   memset(&prog, 0, sizeof(prog));
79   memset(&state, 0, sizeof(state));
80   state.prog = &prog;
81
82   if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
83				&state)) {
84      /* Error in the program. Just return. */
85      return;
86   }
87
88   if ((ctx->_Shader->Flags & GLSL_NO_OPT) == 0)
89      _mesa_optimize_program(ctx, &prog);
90
91   free(program->Base.String);
92
93   /* Copy the relevant contents of the arb_program struct into the
94    * fragment_program struct.
95    */
96   program->Base.String          = prog.String;
97   program->Base.NumInstructions = prog.NumInstructions;
98   program->Base.NumTemporaries  = prog.NumTemporaries;
99   program->Base.NumParameters   = prog.NumParameters;
100   program->Base.NumAttributes   = prog.NumAttributes;
101   program->Base.NumAddressRegs  = prog.NumAddressRegs;
102   program->Base.NumNativeInstructions = prog.NumNativeInstructions;
103   program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
104   program->Base.NumNativeParameters = prog.NumNativeParameters;
105   program->Base.NumNativeAttributes = prog.NumNativeAttributes;
106   program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
107   program->Base.NumAluInstructions   = prog.NumAluInstructions;
108   program->Base.NumTexInstructions   = prog.NumTexInstructions;
109   program->Base.NumTexIndirections   = prog.NumTexIndirections;
110   program->Base.NumNativeAluInstructions = prog.NumAluInstructions;
111   program->Base.NumNativeTexInstructions = prog.NumTexInstructions;
112   program->Base.NumNativeTexIndirections = prog.NumTexIndirections;
113   program->Base.InputsRead      = prog.InputsRead;
114   program->Base.OutputsWritten  = prog.OutputsWritten;
115   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
116   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) {
117      program->Base.TexturesUsed[i] = prog.TexturesUsed[i];
118      if (prog.TexturesUsed[i])
119         program->Base.SamplersUsed |= (1 << i);
120   }
121   program->Base.ShadowSamplers = prog.ShadowSamplers;
122   program->OriginUpperLeft = state.option.OriginUpperLeft;
123   program->PixelCenterInteger = state.option.PixelCenterInteger;
124
125   program->UsesKill            = state.fragment.UsesKill;
126   program->UsesDFdy            = state.fragment.UsesDFdy;
127
128   free(program->Base.Instructions);
129   program->Base.Instructions = prog.Instructions;
130
131   if (program->Base.Parameters)
132      _mesa_free_parameter_list(program->Base.Parameters);
133   program->Base.Parameters    = prog.Parameters;
134
135   /* Append fog instructions now if the program has "OPTION ARB_fog_exp"
136    * or similar.  We used to leave this up to drivers, but it appears
137    * there's no hardware that wants to do fog in a discrete stage separate
138    * from the fragment shader.
139    */
140   if (state.option.Fog != OPTION_NONE) {
141      static const GLenum fog_modes[4] = {
142	 GL_NONE, GL_EXP, GL_EXP2, GL_LINEAR
143      };
144
145      /* XXX: we should somehow recompile this to remove clamping if disabled
146       * On the ATI driver, this is unclampled if fragment clamping is disabled
147       */
148      _mesa_append_fog_code(ctx, program, fog_modes[state.option.Fog], GL_TRUE);
149   }
150
151#if DEBUG_FP
152   printf("____________Fragment program %u ________\n", program->Base.Id);
153   _mesa_print_program(&program->Base);
154#endif
155}
156
157
158
159/**
160 * Parse the vertex program string.  If success, update the given
161 * vertex_program object with the new program.  Else, leave the vertex_program
162 * object unchanged.
163 */
164void
165_mesa_parse_arb_vertex_program(struct gl_context *ctx, GLenum target,
166			       const GLvoid *str, GLsizei len,
167			       struct gl_vertex_program *program)
168{
169   struct gl_program prog;
170   struct asm_parser_state state;
171
172   ASSERT(target == GL_VERTEX_PROGRAM_ARB);
173
174   memset(&prog, 0, sizeof(prog));
175   memset(&state, 0, sizeof(state));
176   state.prog = &prog;
177
178   if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
179				&state)) {
180      _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramString(bad program)");
181      return;
182   }
183
184   if ((ctx->_Shader->Flags & GLSL_NO_OPT) == 0)
185      _mesa_optimize_program(ctx, &prog);
186
187   free(program->Base.String);
188
189   /* Copy the relevant contents of the arb_program struct into the
190    * vertex_program struct.
191    */
192   program->Base.String          = prog.String;
193   program->Base.NumInstructions = prog.NumInstructions;
194   program->Base.NumTemporaries  = prog.NumTemporaries;
195   program->Base.NumParameters   = prog.NumParameters;
196   program->Base.NumAttributes   = prog.NumAttributes;
197   program->Base.NumAddressRegs  = prog.NumAddressRegs;
198   program->Base.NumNativeInstructions = prog.NumNativeInstructions;
199   program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
200   program->Base.NumNativeParameters = prog.NumNativeParameters;
201   program->Base.NumNativeAttributes = prog.NumNativeAttributes;
202   program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
203   program->Base.InputsRead     = prog.InputsRead;
204   program->Base.OutputsWritten = prog.OutputsWritten;
205   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
206   program->IsPositionInvariant = (state.option.PositionInvariant)
207      ? GL_TRUE : GL_FALSE;
208
209   free(program->Base.Instructions);
210   program->Base.Instructions = prog.Instructions;
211
212   if (program->Base.Parameters)
213      _mesa_free_parameter_list(program->Base.Parameters);
214   program->Base.Parameters = prog.Parameters;
215
216#if DEBUG_VP
217   printf("____________Vertex program %u __________\n", program->Base.Id);
218   _mesa_print_program(&program->Base);
219#endif
220}
221