| /* |
| * Copyright © 2009 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <string.h> |
| #include "main/mtypes.h" |
| #include "prog_instruction.h" |
| #include "program_parser.h" |
| |
| |
| /** |
| * Extra assembly-level parser routines |
| * |
| * \author Ian Romanick <ian.d.romanick@intel.com> |
| */ |
| |
| int |
| _mesa_parse_instruction_suffix(const struct asm_parser_state *state, |
| const char *suffix, |
| struct prog_instruction *inst) |
| { |
| inst->Saturate = GL_FALSE; |
| |
| /* The only possible suffix element is the saturation selector from |
| * ARB_fragment_program. |
| */ |
| if (state->mode == ARB_fragment) { |
| if (strcmp(suffix, "_SAT") == 0) { |
| inst->Saturate = GL_TRUE; |
| suffix += 4; |
| } |
| } |
| |
| /* It is an error for all of the suffix string not to be consumed. |
| */ |
| return suffix[0] == '\0'; |
| } |
| |
| |
| int |
| _mesa_ARBvp_parse_option(struct asm_parser_state *state, const char *option) |
| { |
| if (strcmp(option, "ARB_position_invariant") == 0) { |
| state->option.PositionInvariant = 1; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| int |
| _mesa_ARBfp_parse_option(struct asm_parser_state *state, const char *option) |
| { |
| unsigned fog_option; |
| |
| /* All of the options currently supported start with "ARB_". The code is |
| * currently structured with nested if-statements because eventually options |
| * that start with "NV_" will be supported. This structure will result in |
| * less churn when those options are added. |
| */ |
| if (strncmp(option, "ARB_", 4) == 0) { |
| /* Advance the pointer past the "ARB_" prefix. |
| */ |
| option += 4; |
| |
| if (strncmp(option, "fog_", 4) == 0) { |
| option += 4; |
| |
| if (strcmp(option, "exp") == 0) { |
| fog_option = OPTION_FOG_EXP; |
| } else if (strcmp(option, "exp2") == 0) { |
| fog_option = OPTION_FOG_EXP2; |
| } else if (strcmp(option, "linear") == 0) { |
| fog_option = OPTION_FOG_LINEAR; |
| } else { |
| /* invalid option */ |
| return 0; |
| } |
| |
| if (state->option.Fog == OPTION_NONE) { |
| state->option.Fog = fog_option; |
| return 1; |
| } |
| |
| /* The ARB_fragment_program specification instructs us to handle |
| * redundant options in two seemingly contradictory ways: |
| * |
| * Section 3.11.4.5.1 says: |
| * "Only one fog application option may be specified by any given |
| * fragment program. A fragment program that specifies more than one |
| * of the program options "ARB_fog_exp", "ARB_fog_exp2", and |
| * "ARB_fog_linear", will fail to load." |
| * |
| * Issue 27 says: |
| * "The three mandatory options are ARB_fog_exp, ARB_fog_exp2, and |
| * ARB_fog_linear. As these options are mutually exclusive by |
| * nature, specifying more than one is not useful. If more than one |
| * is specified, the last one encountered in the <optionSequence> |
| * will be the one to actually modify the execution environment." |
| * |
| * We choose to allow programs to specify the same OPTION redundantly, |
| * but fail to load programs that specify contradictory options. |
| */ |
| return state->option.Fog == fog_option ? 1 : 0; |
| } else if (strncmp(option, "precision_hint_", 15) == 0) { |
| option += 15; |
| |
| /* The ARB_fragment_program spec, 3.11.4.5.2 says: |
| * |
| * "Only one precision control option may be specified by any given |
| * fragment program. A fragment program that specifies both the |
| * "ARB_precision_hint_fastest" and "ARB_precision_hint_nicest" |
| * program options will fail to load. |
| */ |
| |
| if (strcmp(option, "nicest") == 0 && |
| state->option.PrecisionHint != OPTION_FASTEST) { |
| state->option.PrecisionHint = OPTION_NICEST; |
| return 1; |
| } else if (strcmp(option, "fastest") == 0 && |
| state->option.PrecisionHint != OPTION_NICEST) { |
| state->option.PrecisionHint = OPTION_FASTEST; |
| return 1; |
| } |
| |
| return 0; |
| } else if (strcmp(option, "draw_buffers") == 0) { |
| /* Don't need to check extension availability because all Mesa-based |
| * drivers support GL_ARB_draw_buffers. |
| */ |
| state->option.DrawBuffers = 1; |
| return 1; |
| } else if (strcmp(option, "fragment_program_shadow") == 0) { |
| if (state->ctx->Extensions.ARB_fragment_program_shadow) { |
| state->option.Shadow = 1; |
| return 1; |
| } |
| } else if (strncmp(option, "fragment_coord_", 15) == 0) { |
| option += 15; |
| if (state->ctx->Extensions.ARB_fragment_coord_conventions) { |
| if (strcmp(option, "origin_upper_left") == 0) { |
| state->option.OriginUpperLeft = 1; |
| return 1; |
| } |
| else if (strcmp(option, "pixel_center_integer") == 0) { |
| state->option.PixelCenterInteger = 1; |
| return 1; |
| } |
| } |
| } |
| } else if (strncmp(option, "ATI_", 4) == 0) { |
| option += 4; |
| |
| if (strcmp(option, "draw_buffers") == 0) { |
| /* Don't need to check extension availability because all Mesa-based |
| * drivers support GL_ATI_draw_buffers. |
| */ |
| state->option.DrawBuffers = 1; |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
