1 /************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 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 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. 25 * 26 **************************************************************************/ 27 28 /** 29 * \file 30 * Vertex buffer drawing stage. 31 * 32 * \author Keith Whitwell <keith@tungstengraphics.com> 33 * \author Jose Fonseca <jrfonsec@tungstengraphics.com> 34 */ 35 36 #ifndef DRAW_VBUF_H_ 37 #define DRAW_VBUF_H_ 38 39 40 #include "pipe/p_compiler.h" 41 42 43 struct pipe_rasterizer_state; 44 struct draw_context; 45 struct vertex_info; 46 47 48 /** 49 * Interface for hardware vertex buffer rendering. 50 */ 51 struct vbuf_render { 52 53 /** 54 * Driver limits. May be tuned lower to improve cache hits on 55 * index list. 56 */ 57 unsigned max_indices; 58 unsigned max_vertex_buffer_bytes; 59 60 /** 61 * Query if the hardware driver needs assistance for a particular 62 * combination of rasterizer state and primitive. 63 * 64 * Currently optional. 65 */ 66 boolean (*need_pipeline)(const struct vbuf_render *render, 67 const struct pipe_rasterizer_state *rasterizer, 68 unsigned int prim ); 69 70 71 /** 72 * Get the hardware vertex format. 73 * 74 * XXX: have this in draw_context instead? 75 */ 76 const struct vertex_info *(*get_vertex_info)( struct vbuf_render * ); 77 78 /** 79 * Request a destination for vertices. 80 * Hardware renderers will use ttm memory, others will just malloc 81 * something. 82 */ 83 boolean (*allocate_vertices)( struct vbuf_render *, 84 ushort vertex_size, 85 ushort nr_vertices ); 86 87 void *(*map_vertices)( struct vbuf_render * ); 88 void (*unmap_vertices)( struct vbuf_render *, 89 ushort min_index, 90 ushort max_index ); 91 92 /** 93 * Notify the renderer of the current primitive when it changes. 94 * Must succeed for TRIANGLES, LINES and POINTS. Other prims at 95 * the discretion of the driver, for the benefit of the passthrough 96 * path. 97 */ 98 void (*set_primitive)( struct vbuf_render *, unsigned prim ); 99 100 /** 101 * Draw indexed primitives. Note that indices are ushort. The driver 102 * must complete this call, if necessary splitting the index list itself. 103 */ 104 void (*draw_elements)( struct vbuf_render *, 105 const ushort *indices, 106 uint nr_indices ); 107 108 /* Draw non-indexed primitives. 109 */ 110 void (*draw_arrays)( struct vbuf_render *, 111 unsigned start, 112 uint nr ); 113 114 /** 115 * Called when vbuf is done with this set of vertices: 116 */ 117 void (*release_vertices)( struct vbuf_render * ); 118 119 void (*destroy)( struct vbuf_render * ); 120 121 122 /** 123 * Called after writing data to the stream out buffers 124 */ 125 void (*set_stream_output_info)( struct vbuf_render *vbufr, 126 unsigned primitive_count, 127 unsigned vertices_count, 128 unsigned primitive_generated ); 129 }; 130 131 132 133 struct draw_stage * 134 draw_vbuf_stage( struct draw_context *draw, 135 struct vbuf_render *render ); 136 137 138 #endif /*DRAW_VBUF_H_*/ 139