155 lines
5.4 KiB
C
155 lines
5.4 KiB
C
/**************************************************************************
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*
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* Copyright 2009 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef DRAW_GS_H
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#define DRAW_GS_H
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#include "draw_context.h"
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#include "tgsi/tgsi_exec.h"
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#include "draw_private.h"
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#define MAX_TGSI_PRIMITIVES 4
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struct draw_context;
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#ifdef DRAW_LLVM_AVAILABLE
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struct draw_gs_jit_context;
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struct draw_gs_llvm_variant;
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/**
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* Structure holding the inputs to the geometry shader. It uses SOA layout.
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* The dimensions are as follows:
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* - maximum number of vertices for a geometry shader input primitive
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* (6 for triangle_adjacency)
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* - maximum number of attributes for each vertex
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* - four channels per each attribute (x,y,z,w)
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* - number of input primitives equal to the SOA vector length
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*/
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struct draw_gs_inputs {
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float data[6][PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS][TGSI_NUM_CHANNELS];
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};
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#endif
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/**
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* Private version of the compiled geometry shader
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*/
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struct draw_vertex_stream {
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unsigned *primitive_lengths;
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unsigned emitted_vertices;
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unsigned emitted_primitives;
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float (*tmp_output)[4];
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};
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struct draw_geometry_shader {
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struct draw_context *draw;
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struct tgsi_exec_machine *machine;
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/* This member will disappear shortly:*/
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struct pipe_shader_state state;
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struct tgsi_shader_info info;
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unsigned position_output;
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unsigned viewport_index_output;
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unsigned ccdistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT];
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unsigned max_output_vertices;
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unsigned primitive_boundary;
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unsigned input_primitive;
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unsigned output_primitive;
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unsigned vertex_size;
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struct draw_vertex_stream stream[TGSI_MAX_VERTEX_STREAMS];
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unsigned num_vertex_streams;
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unsigned in_prim_idx;
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unsigned input_vertex_stride;
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unsigned fetched_prim_count;
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const float (*input)[4];
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const struct tgsi_shader_info *input_info;
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unsigned vector_length;
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unsigned max_out_prims;
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unsigned num_invocations;
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unsigned invocation_id;
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#ifdef DRAW_LLVM_AVAILABLE
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struct draw_gs_inputs *gs_input;
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struct draw_gs_jit_context *jit_context;
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struct draw_gs_llvm_variant *current_variant;
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struct vertex_header *gs_output[PIPE_MAX_VERTEX_STREAMS];
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int **llvm_prim_lengths;
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int *llvm_emitted_primitives;
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int *llvm_emitted_vertices;
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int *llvm_prim_ids;
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#endif
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void (*fetch_inputs)(struct draw_geometry_shader *shader,
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unsigned *indices,
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unsigned num_vertices,
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unsigned prim_idx);
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void (*fetch_outputs)(struct draw_geometry_shader *shader,
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unsigned vertex_stream,
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unsigned num_primitives,
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float (**p_output)[4]);
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void (*prepare)(struct draw_geometry_shader *shader,
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const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
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const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS]);
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void (*run)(struct draw_geometry_shader *shader,
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unsigned input_primitives, unsigned *out_prims);
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};
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void draw_geometry_shader_new_instance(struct draw_geometry_shader *gs);
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/*
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* Returns the number of vertices emitted.
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* The vertex shader can emit any number of vertices as long as it's
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* smaller than the GS_MAX_OUTPUT_VERTICES shader property.
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*/
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int draw_geometry_shader_run(struct draw_geometry_shader *shader,
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const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
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const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS],
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const struct draw_vertex_info *input_verts,
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const struct draw_prim_info *input_prim,
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const struct tgsi_shader_info *input_info,
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struct draw_vertex_info *output_verts,
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struct draw_prim_info *output_prims );
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void draw_geometry_shader_prepare(struct draw_geometry_shader *shader,
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struct draw_context *draw);
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int draw_gs_max_output_vertices(struct draw_geometry_shader *shader,
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unsigned pipe_prim);
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#ifdef DRAW_LLVM_AVAILABLE
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void draw_gs_set_current_variant(struct draw_geometry_shader *shader,
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struct draw_gs_llvm_variant *variant);
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#endif
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#endif
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