src/mesa/program/arbprogparse.c

   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 /**
  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
  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
  67 void
  68 _mesa_parse_arb_fragment_program(struct gl_context* ctx, GLenum target,
  69                                  const GLvoid *str, GLsizei len,
  70                                  struct gl_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    state.mem_ctx = program;
  82
  83    if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
  84                                 &state)) {
  85       /* Error in the program. Just return. */
  86       return;
  87    }
  88
  89    ralloc_free(program->String);
  90
  91    /* Copy the relevant contents of the arb_program struct into the
  92     * fragment_program struct.
  93     */
  94    program->String          = prog.String;
  95    program->arb.NumInstructions = prog.arb.NumInstructions;
  96    program->arb.NumTemporaries  = prog.arb.NumTemporaries;
  97    program->arb.NumParameters   = prog.arb.NumParameters;
  98    program->arb.NumAttributes   = prog.arb.NumAttributes;
  99    program->arb.NumAddressRegs  = prog.arb.NumAddressRegs;
 100    program->arb.NumNativeInstructions = prog.arb.NumNativeInstructions;
 101    program->arb.NumNativeTemporaries = prog.arb.NumNativeTemporaries;
 102    program->arb.NumNativeParameters = prog.arb.NumNativeParameters;
 103    program->arb.NumNativeAttributes = prog.arb.NumNativeAttributes;
 104    program->arb.NumNativeAddressRegs = prog.arb.NumNativeAddressRegs;
 105    program->arb.NumAluInstructions   = prog.arb.NumAluInstructions;
 106    program->arb.NumTexInstructions   = prog.arb.NumTexInstructions;
 107    program->arb.NumTexIndirections   = prog.arb.NumTexIndirections;
 108    program->arb.NumNativeAluInstructions = prog.arb.NumAluInstructions;
 109    program->arb.NumNativeTexInstructions = prog.arb.NumTexInstructions;
 110    program->arb.NumNativeTexIndirections = prog.arb.NumTexIndirections;
 111    program->info.inputs_read      = prog.info.inputs_read;
 112    program->info.outputs_written = prog.info.outputs_written;
 113    program->arb.IndirectRegisterFiles = prog.arb.IndirectRegisterFiles;
 114    for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) {
 115       program->TexturesUsed[i] = prog.TexturesUsed[i];
 116       if (prog.TexturesUsed[i])
 117          program->SamplersUsed |= (1 << i);
 118    }
 119    program->ShadowSamplers = prog.ShadowSamplers;
 120    program->info.fs.origin_upper_left = state.option.OriginUpperLeft;
 121    program->info.fs.pixel_center_integer = state.option.PixelCenterInteger;
 122
 123    program->info.fs.uses_discard = state.fragment.UsesKill;
 124
 125    ralloc_free(program->arb.Instructions);
 126    program->arb.Instructions = prog.arb.Instructions;
 127
 128    if (program->Parameters)
 129       _mesa_free_parameter_list(program->Parameters);
 130    program->Parameters    = prog.Parameters;
 131
 132    /* Append fog instructions now if the program has "OPTION ARB_fog_exp"
 133     * or similar.  We used to leave this up to drivers, but it appears
 134     * there's no hardware that wants to do fog in a discrete stage separate
 135     * from the fragment shader.
 136     */
 137    if (state.option.Fog != OPTION_NONE) {
 138       static const GLenum fog_modes[4] = {
 139          GL_NONE, GL_EXP, GL_EXP2, GL_LINEAR
 140       };
 141
 142       /* XXX: we should somehow recompile this to remove clamping if disabled
 143        * On the ATI driver, this is unclampled if fragment clamping is disabled
 144        */
 145       _mesa_append_fog_code(ctx, program, fog_modes[state.option.Fog], GL_TRUE);
 146    }
 147
 148 #if DEBUG_FP
 149    printf("____________Fragment program %u ________\n", program->Id);
 150    _mesa_print_program(&program->Base);
 151 #endif
 152 }
 153
 154
 155
 156 /**
 157  * Parse the vertex program string.  If success, update the given
 158  * vertex_program object with the new program.  Else, leave the vertex_program
 159  * object unchanged.
 160  */
 161 void
 162 _mesa_parse_arb_vertex_program(struct gl_context *ctx, GLenum target,
 163                                const GLvoid *str, GLsizei len,
 164                                struct gl_program *program)
 165 {
 166    struct gl_program prog;
 167    struct asm_parser_state state;
 168
 169    assert(target == GL_VERTEX_PROGRAM_ARB);
 170
 171    memset(&prog, 0, sizeof(prog));
 172    memset(&state, 0, sizeof(state));
 173    state.prog = &prog;
 174    state.mem_ctx = program;
 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    _mesa_optimize_program(&prog, program);
 183
 184    ralloc_free(program->String);
 185
 186    /* Copy the relevant contents of the arb_program struct into the
 187     * vertex_program struct.
 188     */
 189    program->String          = prog.String;
 190    program->arb.NumInstructions = prog.arb.NumInstructions;
 191    program->arb.NumTemporaries  = prog.arb.NumTemporaries;
 192    program->arb.NumParameters   = prog.arb.NumParameters;
 193    program->arb.NumAttributes   = prog.arb.NumAttributes;
 194    program->arb.NumAddressRegs  = prog.arb.NumAddressRegs;
 195    program->arb.NumNativeInstructions = prog.arb.NumNativeInstructions;
 196    program->arb.NumNativeTemporaries = prog.arb.NumNativeTemporaries;
 197    program->arb.NumNativeParameters = prog.arb.NumNativeParameters;
 198    program->arb.NumNativeAttributes = prog.arb.NumNativeAttributes;
 199    program->arb.NumNativeAddressRegs = prog.arb.NumNativeAddressRegs;
 200    program->info.inputs_read     = prog.info.inputs_read;
 201    program->info.outputs_written = prog.info.outputs_written;
 202    program->arb.IndirectRegisterFiles = prog.arb.IndirectRegisterFiles;
 203    program->arb.IsPositionInvariant = (state.option.PositionInvariant)
 204       ? GL_TRUE : GL_FALSE;
 205
 206    ralloc_free(program->arb.Instructions);
 207    program->arb.Instructions = prog.arb.Instructions;
 208
 209    if (program->Parameters)
 210       _mesa_free_parameter_list(program->Parameters);
 211    program->Parameters = prog.Parameters;
 212
 213 #if DEBUG_VP
 214    printf("____________Vertex program %u __________\n", program->Id);
 215    _mesa_print_program(program);
 216 #endif
 217 }