1 /************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 4 * 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 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 /** 29 * Post-transform vertex format info. The vertex_info struct is used by 30 * the draw_vbuf code to emit hardware-specific vertex layouts into hw 31 * vertex buffers. 32 * 33 * Author: 34 * Brian Paul 35 */ 36 37 38 #ifndef DRAW_VERTEX_H 39 #define DRAW_VERTEX_H 40 41 42 #include "pipe/p_compiler.h" 43 #include "pipe/p_state.h" 44 #include "util/u_debug.h" 45 #include "util/u_memory.h" 46 47 #define DRAW_ATTR_NONEXIST 255 48 49 /** 50 * Vertex attribute emit modes 51 */ 52 enum attrib_emit { 53 EMIT_OMIT, /**< don't emit the attribute */ 54 EMIT_1F, 55 EMIT_1F_PSIZE, /**< insert constant point size */ 56 EMIT_2F, 57 EMIT_3F, 58 EMIT_4F, 59 EMIT_4UB, /**< is RGBA like the rest */ 60 EMIT_4UB_BGRA 61 }; 62 63 64 /** 65 * Information about hardware/rasterization vertex layout. 66 */ 67 struct vertex_info 68 { 69 uint num_attribs; 70 uint hwfmt[4]; /**< hardware format info for this format */ 71 uint size; /**< total vertex size in dwords */ 72 73 /* Keep this small and at the end of the struct to allow quick 74 * memcmp() comparisons. 75 */ 76 struct { 77 unsigned emit:8; /**< EMIT_x */ 78 unsigned src_index:8; /**< map to post-xform attribs */ 79 } attrib[PIPE_MAX_SHADER_OUTPUTS]; 80 }; 81 82 static inline size_t 83 draw_vinfo_size( const struct vertex_info *a ) 84 { 85 return offsetof(const struct vertex_info, attrib[a->num_attribs]); 86 } 87 88 static inline int 89 draw_vinfo_compare( const struct vertex_info *a, 90 const struct vertex_info *b ) 91 { 92 size_t sizea = draw_vinfo_size( a ); 93 return memcmp( a, b, sizea ); 94 } 95 96 static inline void 97 draw_vinfo_copy( struct vertex_info *dst, 98 const struct vertex_info *src ) 99 { 100 size_t size = draw_vinfo_size( src ); 101 memcpy( dst, src, size ); 102 } 103 104 105 106 /** 107 * Add another attribute to the given vertex_info object. 108 * \param src_index indicates which post-transformed vertex attrib slot 109 * corresponds to this attribute. 110 * \return slot in which the attribute was added 111 */ 112 static inline uint 113 draw_emit_vertex_attr(struct vertex_info *vinfo, 114 enum attrib_emit emit, 115 int src_index) 116 { 117 const uint n = vinfo->num_attribs; 118 119 /* If the src_index is negative, meaning it hasn't been found 120 * we'll assign it all zeros later - set to DRAW_ATTR_NONEXIST */ 121 if (src_index < 0) { 122 src_index = DRAW_ATTR_NONEXIST; 123 } 124 125 assert(n < ARRAY_SIZE(vinfo->attrib)); 126 vinfo->attrib[n].emit = emit; 127 vinfo->attrib[n].src_index = src_index; 128 vinfo->num_attribs++; 129 return n; 130 } 131 132 133 extern void draw_compute_vertex_size(struct vertex_info *vinfo); 134 135 void draw_dump_emitted_vertex(const struct vertex_info *vinfo, 136 const uint8_t *data); 137 138 139 static inline enum pipe_format draw_translate_vinfo_format(enum attrib_emit emit) 140 { 141 switch (emit) { 142 case EMIT_OMIT: 143 return PIPE_FORMAT_NONE; 144 case EMIT_1F: 145 case EMIT_1F_PSIZE: 146 return PIPE_FORMAT_R32_FLOAT; 147 case EMIT_2F: 148 return PIPE_FORMAT_R32G32_FLOAT; 149 case EMIT_3F: 150 return PIPE_FORMAT_R32G32B32_FLOAT; 151 case EMIT_4F: 152 return PIPE_FORMAT_R32G32B32A32_FLOAT; 153 case EMIT_4UB: 154 return PIPE_FORMAT_R8G8B8A8_UNORM; 155 case EMIT_4UB_BGRA: 156 return PIPE_FORMAT_B8G8R8A8_UNORM; 157 default: 158 assert(!"unexpected format"); 159 return PIPE_FORMAT_NONE; 160 } 161 } 162 163 static inline unsigned draw_translate_vinfo_size(enum attrib_emit emit) 164 { 165 switch (emit) { 166 case EMIT_OMIT: 167 return 0; 168 case EMIT_1F: 169 case EMIT_1F_PSIZE: 170 return 1 * sizeof(float); 171 case EMIT_2F: 172 return 2 * sizeof(float); 173 case EMIT_3F: 174 return 3 * sizeof(float); 175 case EMIT_4F: 176 return 4 * sizeof(float); 177 case EMIT_4UB: 178 return 4 * sizeof(unsigned char); 179 case EMIT_4UB_BGRA: 180 return 4 * sizeof(unsigned char); 181 default: 182 assert(!"unexpected format"); 183 return 0; 184 } 185 } 186 187 #endif /* DRAW_VERTEX_H */ 188
