1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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 TUNGSTEN GRAPHICS 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.
26 **************************************************************************/
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
42 #include "pipe/p_compiler.h"
43 #include "pipe/p_state.h"
44 #include "util/u_debug.h"
48 * Vertex attribute emit modes
51 EMIT_OMIT, /**< don't emit the attribute */
53 EMIT_1F_PSIZE, /**< insert constant point size */
57 EMIT_4UB, /**< is RGBA like the rest */
63 * Attribute interpolation mode
66 INTERP_NONE, /**< never interpolate vertex header info */
67 INTERP_POS, /**< special case for frag position */
75 * Information about hardware/rasterization vertex layout.
80 uint hwfmt[4]; /**< hardware format info for this format */
81 uint size; /**< total vertex size in dwords */
83 /* Keep this small and at the end of the struct to allow quick
84 * memcmp() comparisons.
87 unsigned interp_mode:4; /**< INTERP_x */
88 unsigned emit:4; /**< EMIT_x */
89 unsigned src_index:8; /**< map to post-xform attribs */
90 } attrib[PIPE_MAX_SHADER_INPUTS];
94 draw_vinfo_size( const struct vertex_info *a )
96 return offsetof(const struct vertex_info, attrib[a->num_attribs]);
100 draw_vinfo_compare( const struct vertex_info *a,
101 const struct vertex_info *b )
103 size_t sizea = draw_vinfo_size( a );
104 return memcmp( a, b, sizea );
108 draw_vinfo_copy( struct vertex_info *dst,
109 const struct vertex_info *src )
111 size_t size = draw_vinfo_size( src );
112 memcpy( dst, src, size );
118 * Add another attribute to the given vertex_info object.
119 * \param src_index indicates which post-transformed vertex attrib slot
120 * corresponds to this attribute.
121 * \return slot in which the attribute was added
124 draw_emit_vertex_attr(struct vertex_info *vinfo,
125 enum attrib_emit emit,
126 enum interp_mode interp, /* only used by softpipe??? */
129 const uint n = vinfo->num_attribs;
130 assert(n < PIPE_MAX_SHADER_INPUTS);
131 vinfo->attrib[n].emit = emit;
132 vinfo->attrib[n].interp_mode = interp;
133 vinfo->attrib[n].src_index = src_index;
134 vinfo->num_attribs++;
139 extern void draw_compute_vertex_size(struct vertex_info *vinfo);
141 void draw_dump_emitted_vertex(const struct vertex_info *vinfo,
142 const uint8_t *data);
145 static INLINE enum pipe_format draw_translate_vinfo_format(enum attrib_emit emit)
149 return PIPE_FORMAT_NONE;
152 return PIPE_FORMAT_R32_FLOAT;
154 return PIPE_FORMAT_R32G32_FLOAT;
156 return PIPE_FORMAT_R32G32B32_FLOAT;
158 return PIPE_FORMAT_R32G32B32A32_FLOAT;
160 return PIPE_FORMAT_R8G8B8A8_UNORM;
162 return PIPE_FORMAT_B8G8R8A8_UNORM;
164 assert(!"unexpected format");
165 return PIPE_FORMAT_NONE;
169 static INLINE unsigned draw_translate_vinfo_size(enum attrib_emit emit)
176 return 1 * sizeof(float);
178 return 2 * sizeof(float);
180 return 3 * sizeof(float);
182 return 4 * sizeof(float);
184 return 4 * sizeof(unsigned char);
186 return 4 * sizeof(unsigned char);
188 assert(!"unexpected format");
193 #endif /* DRAW_VERTEX_H */