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Diffstat (limited to 'src/mesa/pipe/draw/draw_private.h')
| -rw-r--r-- | src/mesa/pipe/draw/draw_private.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/mesa/pipe/draw/draw_private.h b/src/mesa/pipe/draw/draw_private.h new file mode 100644 index 0000000000..573b5bf588 --- /dev/null +++ b/src/mesa/pipe/draw/draw_private.h @@ -0,0 +1,182 @@ +/************************************************************************** + * + * 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. + * + **************************************************************************/ + +/** + * Private data structures, etc for the draw module. + */ + + +/** + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + * Brian Paul + */ + + +#ifndef DRAW_PRIVATE_H +#define DRAW_PRIVATE_H + + +#include "main/glheader.h" +#include "pipe/p_state.h" +#include "pipe/p_defines.h" +#include "vf/vf.h" + + +/** + * Basic vertex info. + * Carry some useful information around with the vertices in the prim pipe. + */ +struct vertex_header { + GLuint clipmask:12; + GLuint edgeflag:1; + GLuint pad:19; + + GLfloat clip[4]; + + GLfloat data[][4]; /* Note variable size */ +}; + + +/** + * Basic info for a point/line/triangle primitive. + */ +struct prim_header { + GLfloat det; /**< front/back face determinant */ + struct vertex_header *v[3]; /**< 1 to 3 vertex pointers */ +}; + + + +struct draw_context; + +/** + * Base class for all primitive drawing stages. + */ +struct draw_stage +{ + struct draw_context *draw; /**< parent context */ + + struct draw_stage *next; /**< next stage in pipeline */ + + struct vertex_header **tmp; + GLuint nr_tmps; + + void (*begin)( struct draw_stage * ); + + void (*point)( struct draw_stage *, + struct prim_header * ); + + void (*line)( struct draw_stage *, + struct prim_header * ); + + void (*tri)( struct draw_stage *, + struct prim_header * ); + + void (*end)( struct draw_stage * ); +}; + + +/** + * Private context for the drawing module. + */ +struct draw_context +{ + struct { + struct draw_stage *first; /**< one of the following */ + + /* stages (in logical order) */ + struct draw_stage *flatshade; + struct draw_stage *clip; + struct draw_stage *cull; + struct draw_stage *twoside; + struct draw_stage *offset; + struct draw_stage *unfilled; + struct draw_stage *setup; /* aka render/rasterize */ + } pipeline; + + /* pipe state that we need: */ + struct pipe_setup_state setup; + struct pipe_viewport_state viewport; + + /* Clip derived state: + */ + GLfloat plane[12][4]; + GLuint nr_planes; + + GLuint vf_attr_to_slot[PIPE_ATTRIB_MAX]; + + struct vf_attr_map attrs[VF_ATTRIB_MAX]; + GLuint nr_attrs; + GLuint vertex_size; /**< in bytes */ + struct vertex_fetch *vf; + + GLubyte *verts; + GLuint nr_vertices; + GLboolean in_vb; + + GLenum prim; /**< GL_POINTS, GL_LINE_STRIP, GL_QUADS, etc */ + + /* Helper for tnl: + */ + GLvector4f header; +}; + + + +extern struct draw_stage *draw_unfilled_stage( struct draw_context *context ); +extern struct draw_stage *draw_twoside_stage( struct draw_context *context ); +extern struct draw_stage *draw_offset_stage( struct draw_context *context ); +extern struct draw_stage *draw_clip_stage( struct draw_context *context ); +extern struct draw_stage *draw_flatshade_stage( struct draw_context *context ); +extern struct draw_stage *draw_cull_stage( struct draw_context *context ); + + +extern void draw_free_tmps( struct draw_stage *stage ); +extern void draw_alloc_tmps( struct draw_stage *stage, GLuint nr ); + + + +/** + * Get a writeable copy of a vertex. + * \param stage drawing stage info + * \param vert the vertex to copy (source) + * \param idx index into stage's tmp[] array to put the copy (dest) + * \return pointer to the copied vertex + */ +static INLINE struct vertex_header * +dup_vert( struct draw_stage *stage, + const struct vertex_header *vert, + GLuint idx ) +{ + struct vertex_header *tmp = stage->tmp[idx]; + memcpy(tmp, vert, stage->draw->vertex_size ); + return tmp; +} + + +#endif /* DRAW_PRIVATE_H */ |