1 /************************************************************************** 2 * 3 * Copyright 2009 VMware, Inc. 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 #ifndef DRAW_GS_H 29 #define DRAW_GS_H 30 31 #include "draw_context.h" 32 #include "draw_private.h" 33 34 35 #define MAX_TGSI_PRIMITIVES 4 36 37 struct draw_context; 38 39 /** 40 * Private version of the compiled geometry shader 41 */ 42 struct draw_geometry_shader { 43 struct draw_context *draw; 44 45 struct tgsi_exec_machine *machine; 46 47 /* This member will disappear shortly:*/ 48 struct pipe_shader_state state; 49 50 struct tgsi_shader_info info; 51 unsigned position_output; 52 53 unsigned max_output_vertices; 54 unsigned input_primitive; 55 unsigned output_primitive; 56 57 unsigned *primitive_lengths; 58 unsigned emitted_vertices; 59 unsigned emitted_primitives; 60 61 float (*tmp_output)[4]; 62 unsigned vertex_size; 63 64 unsigned in_prim_idx; 65 unsigned input_vertex_stride; 66 const float (*input)[4]; 67 }; 68 69 /* 70 * Returns the number of vertices emitted. 71 * The vertex shader can emit any number of vertices as long as it's 72 * smaller than the GS_MAX_OUTPUT_VERTICES shader property. 73 */ 74 int draw_geometry_shader_run(struct draw_geometry_shader *shader, 75 const void *constants[PIPE_MAX_CONSTANT_BUFFERS], 76 const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS], 77 const struct draw_vertex_info *input_verts, 78 const struct draw_prim_info *input_prim, 79 struct draw_vertex_info *output_verts, 80 struct draw_prim_info *output_prims ); 81 82 void draw_geometry_shader_prepare(struct draw_geometry_shader *shader, 83 struct draw_context *draw); 84 85 void draw_geometry_shader_delete(struct draw_geometry_shader *shader); 86 87 int draw_gs_max_output_vertices(struct draw_geometry_shader *shader, 88 unsigned pipe_prim); 89 90 #endif 91