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 HAVE_LLVM 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_geometry_shader { 61 struct draw_context *draw; 62 63 struct tgsi_exec_machine *machine; 64 65 /* This member will disappear shortly:*/ 66 struct pipe_shader_state state; 67 68 struct tgsi_shader_info info; 69 unsigned position_output; 70 unsigned viewport_index_output; 71 unsigned ccdistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT]; 72 73 unsigned max_output_vertices; 74 unsigned primitive_boundary; 75 unsigned input_primitive; 76 unsigned output_primitive; 77 78 unsigned *primitive_lengths; 79 unsigned emitted_vertices; 80 unsigned emitted_primitives; 81 82 float (*tmp_output)[4]; 83 unsigned vertex_size; 84 85 unsigned in_prim_idx; 86 unsigned input_vertex_stride; 87 unsigned fetched_prim_count; 88 const float (*input)[4]; 89 const struct tgsi_shader_info *input_info; 90 unsigned vector_length; 91 unsigned max_out_prims; 92 93 unsigned num_invocations; 94 unsigned invocation_id; 95 #ifdef HAVE_LLVM 96 struct draw_gs_inputs *gs_input; 97 struct draw_gs_jit_context *jit_context; 98 struct draw_gs_llvm_variant *current_variant; 99 struct vertex_header *gs_output; 100 101 int **llvm_prim_lengths; 102 int *llvm_emitted_primitives; 103 int *llvm_emitted_vertices; 104 int *llvm_prim_ids; 105 #endif 106 107 void (*fetch_inputs)(struct draw_geometry_shader *shader, 108 unsigned *indices, 109 unsigned num_vertices, 110 unsigned prim_idx); 111 void (*fetch_outputs)(struct draw_geometry_shader *shader, 112 unsigned num_primitives, 113 float (**p_output)[4]); 114 115 void (*prepare)(struct draw_geometry_shader *shader, 116 const void *constants[PIPE_MAX_CONSTANT_BUFFERS], 117 const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS]); 118 unsigned (*run)(struct draw_geometry_shader *shader, 119 unsigned input_primitives); 120 }; 121 122 void draw_geometry_shader_new_instance(struct draw_geometry_shader *gs); 123 124 /* 125 * Returns the number of vertices emitted. 126 * The vertex shader can emit any number of vertices as long as it's 127 * smaller than the GS_MAX_OUTPUT_VERTICES shader property. 128 */ 129 int draw_geometry_shader_run(struct draw_geometry_shader *shader, 130 const void *constants[PIPE_MAX_CONSTANT_BUFFERS], 131 const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS], 132 const struct draw_vertex_info *input_verts, 133 const struct draw_prim_info *input_prim, 134 const struct tgsi_shader_info *input_info, 135 struct draw_vertex_info *output_verts, 136 struct draw_prim_info *output_prims ); 137 138 void draw_geometry_shader_prepare(struct draw_geometry_shader *shader, 139 struct draw_context *draw); 140 141 int draw_gs_max_output_vertices(struct draw_geometry_shader *shader, 142 unsigned pipe_prim); 143 144 #ifdef HAVE_LLVM 145 void draw_gs_set_current_variant(struct draw_geometry_shader *shader, 146 struct draw_gs_llvm_variant *variant); 147 #endif 148 149 #endif 150
