/************************************************************************** * * 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_compiler.h" #include "pipe/p_state.h" #include "util/u_debug.h" #include "util/u_memory.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, /**< is RGBA like the rest */ EMIT_4UB_BGRA }; /** * 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_OUTPUTS]; }; 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??? */ int src_index) { const uint n = vinfo->num_attribs; assert(n < Elements(vinfo->attrib)); 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 enum pipe_format draw_translate_vinfo_format(enum attrib_emit emit) { switch (emit) { case EMIT_OMIT: return PIPE_FORMAT_NONE; 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; case EMIT_4UB_BGRA: return PIPE_FORMAT_B8G8R8A8_UNORM; default: assert(!"unexpected format"); return PIPE_FORMAT_NONE; } } static INLINE unsigned draw_translate_vinfo_size(enum attrib_emit emit) { switch (emit) { case EMIT_OMIT: return 0; case EMIT_1F: case EMIT_1F_PSIZE: return 1 * sizeof(float); case EMIT_2F: return 2 * sizeof(float); case EMIT_3F: return 3 * sizeof(float); case EMIT_4F: return 4 * sizeof(float); case EMIT_4UB: return 4 * sizeof(unsigned char); case EMIT_4UB_BGRA: return 4 * sizeof(unsigned char); default: assert(!"unexpected format"); return 0; } } #endif /* DRAW_VERTEX_H */