1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 *
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:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
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.
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 /**
34 Notes on program parameters, etc.
35
36 The 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
48 Basically, all the program.local[] and program.env[] values will get mapped
49 into the unified gl_program->Parameters array. This solves the problem of
50 having 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 "program_parser.h"
64
65
66 void
_mesa_parse_arb_fragment_program(struct gl_context * ctx,GLenum target,const GLvoid * str,GLsizei len,struct gl_fragment_program * program)67 _mesa_parse_arb_fragment_program(struct gl_context* ctx, GLenum target,
68 const GLvoid *str, GLsizei len,
69 struct gl_fragment_program *program)
70 {
71 struct gl_program prog;
72 struct asm_parser_state state;
73 GLuint i;
74
75 ASSERT(target == GL_FRAGMENT_PROGRAM_ARB);
76
77 memset(&prog, 0, sizeof(prog));
78 memset(&state, 0, sizeof(state));
79 state.prog = &prog;
80
81 if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
82 &state)) {
83 /* Error in the program. Just return. */
84 return;
85 }
86
87 if (program->Base.String != NULL)
88 free(program->Base.String);
89
90 /* Copy the relevant contents of the arb_program struct into the
91 * fragment_program struct.
92 */
93 program->Base.String = prog.String;
94 program->Base.NumInstructions = prog.NumInstructions;
95 program->Base.NumTemporaries = prog.NumTemporaries;
96 program->Base.NumParameters = prog.NumParameters;
97 program->Base.NumAttributes = prog.NumAttributes;
98 program->Base.NumAddressRegs = prog.NumAddressRegs;
99 program->Base.NumNativeInstructions = prog.NumNativeInstructions;
100 program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
101 program->Base.NumNativeParameters = prog.NumNativeParameters;
102 program->Base.NumNativeAttributes = prog.NumNativeAttributes;
103 program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
104 program->Base.NumAluInstructions = prog.NumAluInstructions;
105 program->Base.NumTexInstructions = prog.NumTexInstructions;
106 program->Base.NumTexIndirections = prog.NumTexIndirections;
107 program->Base.NumNativeAluInstructions = prog.NumAluInstructions;
108 program->Base.NumNativeTexInstructions = prog.NumTexInstructions;
109 program->Base.NumNativeTexIndirections = prog.NumTexIndirections;
110 program->Base.InputsRead = prog.InputsRead;
111 program->Base.OutputsWritten = prog.OutputsWritten;
112 program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
113 for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) {
114 program->Base.TexturesUsed[i] = prog.TexturesUsed[i];
115 if (prog.TexturesUsed[i])
116 program->Base.SamplersUsed |= (1 << i);
117 }
118 program->Base.ShadowSamplers = prog.ShadowSamplers;
119 program->OriginUpperLeft = state.option.OriginUpperLeft;
120 program->PixelCenterInteger = state.option.PixelCenterInteger;
121
122 program->UsesKill = state.fragment.UsesKill;
123 program->UsesDFdy = state.fragment.UsesDFdy;
124
125 if (program->Base.Instructions)
126 free(program->Base.Instructions);
127 program->Base.Instructions = prog.Instructions;
128
129 if (program->Base.Parameters)
130 _mesa_free_parameter_list(program->Base.Parameters);
131 program->Base.Parameters = prog.Parameters;
132
133 /* Append fog instructions now if the program has "OPTION ARB_fog_exp"
134 * or similar. We used to leave this up to drivers, but it appears
135 * there's no hardware that wants to do fog in a discrete stage separate
136 * from the fragment shader.
137 */
138 if (state.option.Fog != OPTION_NONE) {
139 static const GLenum fog_modes[4] = {
140 GL_NONE, GL_EXP, GL_EXP2, GL_LINEAR
141 };
142
143 /* XXX: we should somehow recompile this to remove clamping if disabled
144 * On the ATI driver, this is unclampled if fragment clamping is disabled
145 */
146 _mesa_append_fog_code(ctx, program, fog_modes[state.option.Fog], GL_TRUE);
147 }
148
149 #if DEBUG_FP
150 printf("____________Fragment program %u ________\n", program->Base.Id);
151 _mesa_print_program(&program->Base);
152 #endif
153 }
154
155
156
157 /**
158 * Parse the vertex program string. If success, update the given
159 * vertex_program object with the new program. Else, leave the vertex_program
160 * object unchanged.
161 */
162 void
_mesa_parse_arb_vertex_program(struct gl_context * ctx,GLenum target,const GLvoid * str,GLsizei len,struct gl_vertex_program * program)163 _mesa_parse_arb_vertex_program(struct gl_context *ctx, GLenum target,
164 const GLvoid *str, GLsizei len,
165 struct gl_vertex_program *program)
166 {
167 struct gl_program prog;
168 struct asm_parser_state state;
169
170 ASSERT(target == GL_VERTEX_PROGRAM_ARB);
171
172 memset(&prog, 0, sizeof(prog));
173 memset(&state, 0, sizeof(state));
174 state.prog = &prog;
175
176 if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
177 &state)) {
178 _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramString(bad program)");
179 return;
180 }
181
182 if (program->Base.String != NULL)
183 free(program->Base.String);
184
185 /* Copy the relevant contents of the arb_program struct into the
186 * vertex_program struct.
187 */
188 program->Base.String = prog.String;
189 program->Base.NumInstructions = prog.NumInstructions;
190 program->Base.NumTemporaries = prog.NumTemporaries;
191 program->Base.NumParameters = prog.NumParameters;
192 program->Base.NumAttributes = prog.NumAttributes;
193 program->Base.NumAddressRegs = prog.NumAddressRegs;
194 program->Base.NumNativeInstructions = prog.NumNativeInstructions;
195 program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
196 program->Base.NumNativeParameters = prog.NumNativeParameters;
197 program->Base.NumNativeAttributes = prog.NumNativeAttributes;
198 program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
199 program->Base.InputsRead = prog.InputsRead;
200 program->Base.OutputsWritten = prog.OutputsWritten;
201 program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
202 program->IsPositionInvariant = (state.option.PositionInvariant)
203 ? GL_TRUE : GL_FALSE;
204
205 if (program->Base.Instructions)
206 free(program->Base.Instructions);
207 program->Base.Instructions = prog.Instructions;
208
209 if (program->Base.Parameters)
210 _mesa_free_parameter_list(program->Base.Parameters);
211 program->Base.Parameters = prog.Parameters;
212
213 #if DEBUG_VP
214 printf("____________Vertex program %u __________\n", program->Base.Id);
215 _mesa_print_program(&program->Base);
216 #endif
217 }
218