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Diffstat (limited to 'src/gallium/auxiliary/draw/draw_vertex.h')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_vertex.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_vertex.h b/src/gallium/auxiliary/draw/draw_vertex.h new file mode 100644 index 0000000000..554f4ac3c1 --- /dev/null +++ b/src/gallium/auxiliary/draw/draw_vertex.h @@ -0,0 +1,162 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * 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, sub license, 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. + * + **************************************************************************/ + +/** + * Post-transform vertex format info. The vertex_info struct is used by + * the draw_vbuf code to emit hardware-specific vertex layouts into hw + * vertex buffers. + * + * Author: + * Brian Paul + */ + + +#ifndef DRAW_VERTEX_H +#define DRAW_VERTEX_H + + +#include "pipe/p_state.h" + + +/** + * Vertex attribute emit modes + */ +enum attrib_emit { + EMIT_OMIT, /**< don't emit the attribute */ + EMIT_1F, + EMIT_1F_PSIZE, /**< insert constant point size */ + EMIT_2F, + EMIT_3F, + EMIT_4F, + EMIT_4UB /**< XXX may need variations for RGBA vs BGRA, etc */ +}; + + +/** + * Attribute interpolation mode + */ +enum interp_mode { + INTERP_NONE, /**< never interpolate vertex header info */ + INTERP_POS, /**< special case for frag position */ + INTERP_CONSTANT, + INTERP_LINEAR, + INTERP_PERSPECTIVE +}; + + +/** + * Information about hardware/rasterization vertex layout. + */ +struct vertex_info +{ + uint num_attribs; + uint hwfmt[4]; /**< hardware format info for this format */ + uint size; /**< total vertex size in dwords */ + + /* Keep this small and at the end of the struct to allow quick + * memcmp() comparisons. + */ + struct { + unsigned interp_mode:4; /**< INTERP_x */ + unsigned emit:4; /**< EMIT_x */ + unsigned src_index:8; /**< map to post-xform attribs */ + } attrib[PIPE_MAX_SHADER_INPUTS]; +}; + +static INLINE size_t +draw_vinfo_size( const struct vertex_info *a ) +{ + return offsetof(const struct vertex_info, attrib[a->num_attribs]); +} + +static INLINE int +draw_vinfo_compare( const struct vertex_info *a, + const struct vertex_info *b ) +{ + size_t sizea = draw_vinfo_size( a ); + return memcmp( a, b, sizea ); +} + +static INLINE void +draw_vinfo_copy( struct vertex_info *dst, + const struct vertex_info *src ) +{ + size_t size = draw_vinfo_size( src ); + memcpy( dst, src, size ); +} + + + +/** + * Add another attribute to the given vertex_info object. + * \param src_index indicates which post-transformed vertex attrib slot + * corresponds to this attribute. + * \return slot in which the attribute was added + */ +static INLINE uint +draw_emit_vertex_attr(struct vertex_info *vinfo, + enum attrib_emit emit, + enum interp_mode interp, /* only used by softpipe??? */ + uint src_index) +{ + const uint n = vinfo->num_attribs; + assert(n < PIPE_MAX_SHADER_INPUTS); + vinfo->attrib[n].emit = emit; + vinfo->attrib[n].interp_mode = interp; + vinfo->attrib[n].src_index = src_index; + vinfo->num_attribs++; + return n; +} + + +extern void draw_compute_vertex_size(struct vertex_info *vinfo); + +void draw_dump_emitted_vertex(const struct vertex_info *vinfo, + const uint8_t *data); + + +static INLINE unsigned draw_translate_vinfo_format(unsigned format ) +{ + switch (format) { + case EMIT_1F: + case EMIT_1F_PSIZE: + return PIPE_FORMAT_R32_FLOAT; + case EMIT_2F: + return PIPE_FORMAT_R32G32_FLOAT; + case EMIT_3F: + return PIPE_FORMAT_R32G32B32_FLOAT; + case EMIT_4F: + return PIPE_FORMAT_R32G32B32A32_FLOAT; + case EMIT_4UB: + return PIPE_FORMAT_R8G8B8A8_UNORM; + default: + return PIPE_FORMAT_NONE; + } +} + + +#endif /* DRAW_VERTEX_H */ |