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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3770 | Serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial portions |
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| 16 | * of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | **************************************************************************/ |
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| 27 | |||
| 28 | /** |
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| 29 | * Post-transform vertex format info. The vertex_info struct is used by |
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| 30 | * the draw_vbuf code to emit hardware-specific vertex layouts into hw |
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| 31 | * vertex buffers. |
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| 32 | * |
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| 33 | * Author: |
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| 34 | * Brian Paul |
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| 35 | */ |
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| 36 | |||
| 37 | |||
| 38 | #ifndef DRAW_VERTEX_H |
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| 39 | #define DRAW_VERTEX_H |
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| 40 | |||
| 41 | |||
| 42 | #include "pipe/p_compiler.h" |
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| 43 | #include "pipe/p_state.h" |
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| 44 | #include "util/u_debug.h" |
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| 45 | #include "util/u_memory.h" |
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| 46 | |||
| 47 | |||
| 48 | /** |
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| 49 | * Vertex attribute emit modes |
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| 50 | */ |
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| 51 | enum attrib_emit { |
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| 52 | EMIT_OMIT, /**< don't emit the attribute */ |
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| 53 | EMIT_1F, |
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| 54 | EMIT_1F_PSIZE, /**< insert constant point size */ |
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| 55 | EMIT_2F, |
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| 56 | EMIT_3F, |
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| 57 | EMIT_4F, |
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| 58 | EMIT_4UB, /**< is RGBA like the rest */ |
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| 59 | EMIT_4UB_BGRA |
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| 60 | }; |
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| 61 | |||
| 62 | |||
| 63 | /** |
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| 64 | * Attribute interpolation mode |
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| 65 | */ |
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| 66 | enum interp_mode { |
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| 67 | INTERP_NONE, /**< never interpolate vertex header info */ |
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| 68 | INTERP_POS, /**< special case for frag position */ |
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| 69 | INTERP_CONSTANT, |
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| 70 | INTERP_LINEAR, |
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| 71 | INTERP_PERSPECTIVE |
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| 72 | }; |
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| 73 | |||
| 74 | |||
| 75 | /** |
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| 76 | * Information about hardware/rasterization vertex layout. |
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| 77 | */ |
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| 78 | struct vertex_info |
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| 79 | { |
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| 80 | uint num_attribs; |
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| 81 | uint hwfmt[4]; /**< hardware format info for this format */ |
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| 82 | uint size; /**< total vertex size in dwords */ |
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| 83 | |||
| 84 | /* Keep this small and at the end of the struct to allow quick |
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| 85 | * memcmp() comparisons. |
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| 86 | */ |
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| 87 | struct { |
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| 88 | unsigned interp_mode:4; /**< INTERP_x */ |
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| 89 | unsigned emit:4; /**< EMIT_x */ |
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| 90 | unsigned src_index:8; /**< map to post-xform attribs */ |
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| 91 | } attrib[PIPE_MAX_SHADER_OUTPUTS]; |
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| 92 | }; |
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| 93 | |||
| 94 | static INLINE size_t |
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| 95 | draw_vinfo_size( const struct vertex_info *a ) |
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| 96 | { |
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| 97 | return offsetof(const struct vertex_info, attrib[a->num_attribs]); |
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| 98 | } |
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| 99 | |||
| 100 | static INLINE int |
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| 101 | draw_vinfo_compare( const struct vertex_info *a, |
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| 102 | const struct vertex_info *b ) |
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| 103 | { |
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| 104 | size_t sizea = draw_vinfo_size( a ); |
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| 105 | return memcmp( a, b, sizea ); |
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| 106 | } |
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| 107 | |||
| 108 | static INLINE void |
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| 109 | draw_vinfo_copy( struct vertex_info *dst, |
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| 110 | const struct vertex_info *src ) |
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| 111 | { |
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| 112 | size_t size = draw_vinfo_size( src ); |
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| 113 | memcpy( dst, src, size ); |
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| 114 | } |
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| 115 | |||
| 116 | |||
| 117 | |||
| 118 | /** |
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| 119 | * Add another attribute to the given vertex_info object. |
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| 120 | * \param src_index indicates which post-transformed vertex attrib slot |
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| 121 | * corresponds to this attribute. |
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| 122 | * \return slot in which the attribute was added |
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| 123 | */ |
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| 124 | static INLINE uint |
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| 125 | draw_emit_vertex_attr(struct vertex_info *vinfo, |
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| 126 | enum attrib_emit emit, |
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| 127 | enum interp_mode interp, /* only used by softpipe??? */ |
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| 128 | int src_index) |
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| 129 | { |
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| 130 | const uint n = vinfo->num_attribs; |
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| 131 | |||
| 132 | /* If the src_index is negative, meaning it hasn't been found |
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| 133 | * lets just redirect it to the first output slot */ |
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| 134 | if (src_index < 0) { |
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| 135 | src_index = 0; |
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| 136 | } |
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| 137 | |||
| 138 | assert(n < Elements(vinfo->attrib)); |
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| 139 | vinfo->attrib[n].emit = emit; |
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| 140 | vinfo->attrib[n].interp_mode = interp; |
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| 141 | vinfo->attrib[n].src_index = src_index; |
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| 142 | vinfo->num_attribs++; |
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| 143 | return n; |
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| 144 | } |
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| 145 | |||
| 146 | |||
| 147 | extern void draw_compute_vertex_size(struct vertex_info *vinfo); |
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| 148 | |||
| 149 | void draw_dump_emitted_vertex(const struct vertex_info *vinfo, |
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| 150 | const uint8_t *data); |
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| 151 | |||
| 152 | |||
| 153 | static INLINE enum pipe_format draw_translate_vinfo_format(enum attrib_emit emit) |
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| 154 | { |
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| 155 | switch (emit) { |
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| 156 | case EMIT_OMIT: |
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| 157 | return PIPE_FORMAT_NONE; |
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| 158 | case EMIT_1F: |
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| 159 | case EMIT_1F_PSIZE: |
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| 160 | return PIPE_FORMAT_R32_FLOAT; |
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| 161 | case EMIT_2F: |
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| 162 | return PIPE_FORMAT_R32G32_FLOAT; |
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| 163 | case EMIT_3F: |
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| 164 | return PIPE_FORMAT_R32G32B32_FLOAT; |
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| 165 | case EMIT_4F: |
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| 166 | return PIPE_FORMAT_R32G32B32A32_FLOAT; |
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| 167 | case EMIT_4UB: |
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| 168 | return PIPE_FORMAT_R8G8B8A8_UNORM; |
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| 169 | case EMIT_4UB_BGRA: |
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| 170 | return PIPE_FORMAT_B8G8R8A8_UNORM; |
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| 171 | default: |
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| 172 | assert(!"unexpected format"); |
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| 173 | return PIPE_FORMAT_NONE; |
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| 174 | } |
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| 175 | } |
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| 176 | |||
| 177 | static INLINE unsigned draw_translate_vinfo_size(enum attrib_emit emit) |
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| 178 | { |
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| 179 | switch (emit) { |
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| 180 | case EMIT_OMIT: |
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| 181 | return 0; |
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| 182 | case EMIT_1F: |
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| 183 | case EMIT_1F_PSIZE: |
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| 184 | return 1 * sizeof(float); |
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| 185 | case EMIT_2F: |
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| 186 | return 2 * sizeof(float); |
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| 187 | case EMIT_3F: |
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| 188 | return 3 * sizeof(float); |
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| 189 | case EMIT_4F: |
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| 190 | return 4 * sizeof(float); |
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| 191 | case EMIT_4UB: |
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| 192 | return 4 * sizeof(unsigned char); |
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| 193 | case EMIT_4UB_BGRA: |
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| 194 | return 4 * sizeof(unsigned char); |
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| 195 | default: |
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| 196 | assert(!"unexpected format"); |
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| 197 | return 0; |
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| 198 | } |
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| 199 | } |
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| 200 | |||
| 201 | #endif /* DRAW_VERTEX_H */ |