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