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 #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
  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    free(program->Base.String);
  88
  89    /* Copy the relevant contents of the arb_program struct into the
  90     * fragment_program struct.
  91     */
  92    program->Base.String          = prog.String;
  93    program->Base.NumInstructions = prog.NumInstructions;
  94    program->Base.NumTemporaries  = prog.NumTemporaries;
  95    program->Base.NumParameters   = prog.NumParameters;
  96    program->Base.NumAttributes   = prog.NumAttributes;
  97    program->Base.NumAddressRegs  = prog.NumAddressRegs;
  98    program->Base.NumNativeInstructions = prog.NumNativeInstructions;
  99    program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
 100    program->Base.NumNativeParameters = prog.NumNativeParameters;
 101    program->Base.NumNativeAttributes = prog.NumNativeAttributes;
 102    program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
 103    program->Base.NumAluInstructions   = prog.NumAluInstructions;
 104    program->Base.NumTexInstructions   = prog.NumTexInstructions;
 105    program->Base.NumTexIndirections   = prog.NumTexIndirections;
 106    program->Base.NumNativeAluInstructions = prog.NumAluInstructions;
 107    program->Base.NumNativeTexInstructions = prog.NumTexInstructions;
 108    program->Base.NumNativeTexIndirections = prog.NumTexIndirections;
 109    program->Base.InputsRead      = prog.InputsRead;
 110    program->Base.OutputsWritten  = prog.OutputsWritten;
 111    program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
 112    for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) {
 113       program->Base.TexturesUsed[i] = prog.TexturesUsed[i];
 114       if (prog.TexturesUsed[i])
 115          program->Base.SamplersUsed |= (1 << i);
 116    }
 117    program->Base.ShadowSamplers = prog.ShadowSamplers;
 118    program->OriginUpperLeft = state.option.OriginUpperLeft;
 119    program->PixelCenterInteger = state.option.PixelCenterInteger;
 120
 121    program->UsesKill            = state.fragment.UsesKill;
 122    program->UsesDFdy            = state.fragment.UsesDFdy;
 123
 124    free(program->Base.Instructions);
 125    program->Base.Instructions = prog.Instructions;
 126
 127    if (program->Base.Parameters)
 128       _mesa_free_parameter_list(program->Base.Parameters);
 129    program->Base.Parameters    = prog.Parameters;
 130
 131    /* Append fog instructions now if the program has "OPTION ARB_fog_exp"
 132     * or similar.  We used to leave this up to drivers, but it appears
 133     * there's no hardware that wants to do fog in a discrete stage separate
 134     * from the fragment shader.
 135     */
 136    if (state.option.Fog != OPTION_NONE) {
 137       static const GLenum fog_modes[4] = {
 138          GL_NONE, GL_EXP, GL_EXP2, GL_LINEAR
 139       };
 140
 141       /* XXX: we should somehow recompile this to remove clamping if disabled
 142        * On the ATI driver, this is unclampled if fragment clamping is disabled
 143        */
 144       _mesa_append_fog_code(ctx, program, fog_modes[state.option.Fog], GL_TRUE);
 145    }
 146
 147 #if DEBUG_FP
 148    printf("____________Fragment program %u ________\n", program->Base.Id);
 149    _mesa_print_program(&program->Base);
 150 #endif
 151 }
 152
 153
 154
 155 /**
 156  * Parse the vertex program string.  If success, update the given
 157  * vertex_program object with the new program.  Else, leave the vertex_program
 158  * object unchanged.
 159  */
 160 void
 161 _mesa_parse_arb_vertex_program(struct gl_context *ctx, GLenum target,
 162                                const GLvoid *str, GLsizei len,
 163                                struct gl_vertex_program *program)
 164 {
 165    struct gl_program prog;
 166    struct asm_parser_state state;
 167
 168    ASSERT(target == GL_VERTEX_PROGRAM_ARB);
 169
 170    memset(&prog, 0, sizeof(prog));
 171    memset(&state, 0, sizeof(state));
 172    state.prog = &prog;
 173
 174    if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
 175                                 &state)) {
 176       _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramString(bad program)");
 177       return;
 178    }
 179
 180    free(program->Base.String);
 181
 182    /* Copy the relevant contents of the arb_program struct into the
 183     * vertex_program struct.
 184     */
 185    program->Base.String          = prog.String;
 186    program->Base.NumInstructions = prog.NumInstructions;
 187    program->Base.NumTemporaries  = prog.NumTemporaries;
 188    program->Base.NumParameters   = prog.NumParameters;
 189    program->Base.NumAttributes   = prog.NumAttributes;
 190    program->Base.NumAddressRegs  = prog.NumAddressRegs;
 191    program->Base.NumNativeInstructions = prog.NumNativeInstructions;
 192    program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
 193    program->Base.NumNativeParameters = prog.NumNativeParameters;
 194    program->Base.NumNativeAttributes = prog.NumNativeAttributes;
 195    program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
 196    program->Base.InputsRead     = prog.InputsRead;
 197    program->Base.OutputsWritten = prog.OutputsWritten;
 198    program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
 199    program->IsPositionInvariant = (state.option.PositionInvariant)
 200       ? GL_TRUE : GL_FALSE;
 201
 202    free(program->Base.Instructions);
 203    program->Base.Instructions = prog.Instructions;
 204
 205    if (program->Base.Parameters)
 206       _mesa_free_parameter_list(program->Base.Parameters);
 207    program->Base.Parameters = prog.Parameters;
 208
 209 #if DEBUG_VP
 210    printf("____________Vertex program %u __________\n", program->Base.Id);
 211    _mesa_print_program(&program->Base);
 212 #endif
 213 }