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 VMWARE 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 "tgsi/tgsi_exec.h" 33 #include "tgsi/tgsi_scan.h" 34 #include "draw_private.h" 35 36 #define MAX_TGSI_PRIMITIVES 4 37 38 struct draw_context; 39 40 #if DRAW_LLVM_AVAILABLE 41 struct draw_gs_jit_context; 42 struct draw_gs_llvm_variant; 43 44 /** 45 * Structure holding the inputs to the geometry shader. It uses SOA layout. 46 * The dimensions are as follows: 47 * - maximum number of vertices for a geometry shader input primitive 48 * (6 for triangle_adjacency) 49 * - maximum number of attributes for each vertex 50 * - four channels per each attribute (x,y,z,w) 51 * - number of input primitives equal to the SOA vector length 52 */ 53 struct draw_gs_inputs { 54 float data[6][PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS][TGSI_NUM_CHANNELS]; 55 }; 56 #endif 57 58 /** 59 * Private version of the compiled geometry shader 60 */ 61 struct draw_vertex_stream { 62 unsigned *primitive_lengths; 63 unsigned emitted_vertices; 64 unsigned emitted_primitives; 65 float (*tmp_output)[4]; 66 }; 67 68 struct draw_geometry_shader { 69 struct draw_context *draw; 70 71 struct tgsi_exec_machine *machine; 72 73 /* This member will disappear shortly:*/ 74 struct pipe_shader_state state; 75 76 struct tgsi_shader_info info; 77 unsigned position_output; 78 unsigned viewport_index_output; 79 unsigned clipvertex_output; 80 unsigned ccdistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT]; 81 82 unsigned max_output_vertices; 83 unsigned primitive_boundary; 84 unsigned input_primitive; 85 unsigned output_primitive; 86 unsigned vertex_size; 87 88 struct draw_vertex_stream stream[TGSI_MAX_VERTEX_STREAMS]; 89 unsigned num_vertex_streams; 90 91 unsigned in_prim_idx; 92 unsigned input_vertex_stride; 93 unsigned fetched_prim_count; 94 const float (*input)[4]; 95 const struct tgsi_shader_info *input_info; 96 unsigned vector_length; 97 unsigned max_out_prims; 98 99 unsigned num_invocations; 100 unsigned invocation_id; 101 #if DRAW_LLVM_AVAILABLE 102 struct draw_gs_inputs *gs_input; 103 struct draw_gs_jit_context *jit_context; 104 struct lp_jit_resources *jit_resources; 105 struct draw_gs_llvm_variant *current_variant; 106 struct vertex_header *gs_output[PIPE_MAX_VERTEX_STREAMS]; 107 108 int **llvm_prim_lengths; 109 int *llvm_emitted_primitives; 110 int *llvm_emitted_vertices; 111 int *llvm_prim_ids; 112 #endif 113 114 void (*fetch_inputs)(struct draw_geometry_shader *shader, 115 unsigned *indices, 116 unsigned num_vertices, 117 unsigned prim_idx); 118 void (*fetch_outputs)(struct draw_geometry_shader *shader, 119 unsigned vertex_stream, 120 unsigned num_primitives, 121 float (**p_output)[4]); 122 123 void (*prepare)(struct draw_geometry_shader *shader, 124 const struct draw_buffer_info *constants); 125 void (*run)(struct draw_geometry_shader *shader, 126 unsigned input_primitives, unsigned *out_prims); 127 }; 128 129 130 void 131 draw_geometry_shader_new_instance(struct draw_geometry_shader *gs); 132 133 134 /* 135 * Returns the number of vertices emitted. 136 * The vertex shader can emit any number of vertices as long as it's 137 * smaller than the GS_MAX_OUTPUT_VERTICES shader property. 138 */ 139 void 140 draw_geometry_shader_run(struct draw_geometry_shader *shader, 141 const struct draw_buffer_info *constants, 142 const struct draw_vertex_info *input_verts, 143 const struct draw_prim_info *input_prim, 144 const struct tgsi_shader_info *input_info, 145 struct draw_vertex_info *output_verts, 146 struct draw_prim_info *output_prims ); 147 148 void 149 draw_geometry_shader_prepare(struct draw_geometry_shader *shader, 150 struct draw_context *draw); 151 152 int 153 draw_gs_max_output_vertices(struct draw_geometry_shader *shader, 154 unsigned pipe_prim); 155 156 #if DRAW_LLVM_AVAILABLE 157 void 158 draw_gs_set_current_variant(struct draw_geometry_shader *shader, 159 struct draw_gs_llvm_variant *variant); 160 #endif 161 162 #endif 163