src/gallium/auxiliary/draw/draw_private.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 /**
  29  * Private data structures, etc for the draw module.
  30  */
  31
  32
  33 /**
  34  * Authors:
  35  * Keith Whitwell <keith@tungstengraphics.com>
  36  * Brian Paul
  37  */
  38
  39
  40 #ifndef DRAW_PRIVATE_H
  41 #define DRAW_PRIVATE_H
  42
  43
  44 #include "pipe/p_state.h"
  45 #include "pipe/p_defines.h"
  46
  47 #include "tgsi/exec/tgsi_exec.h"
  48 #include "tgsi/util/tgsi_scan.h"
  49
  50
  51 struct pipe_context;
  52 struct gallivm_prog;
  53 struct gallivm_cpu_engine;
  54 struct draw_vertex_shader;
  55 struct draw_context;
  56 struct draw_stage;
  57 struct vbuf_render;
  58
  59
  60 /**
  61  * Basic vertex info.
  62  * Carry some useful information around with the vertices in the prim pipe.
  63  */
  64 struct vertex_header {
  65    unsigned clipmask:12;
  66    unsigned edgeflag:1;
  67    unsigned pad:3;
  68    unsigned vertex_id:16;
  69
  70    float clip[4];
  71
  72    /* This will probably become float (*data)[4] soon:
  73     */
  74    float data[][4];
  75 };
  76
  77 /* NOTE: It should match vertex_id size above */
  78 #define UNDEFINED_VERTEX_ID 0xffff
  79
  80
  81 /**
  82  * Basic info for a point/line/triangle primitive.
  83  */
  84 struct prim_header {
  85    float det;                 /**< front/back face determinant */
  86    unsigned reset_line_stipple:1;
  87    unsigned edgeflags:3;
  88    unsigned pad:28;
  89    struct vertex_header *v[3];  /**< 1 to 3 vertex pointers */
  90 };
  91
  92
  93
  94
  95 #define PT_SHADE      0x1
  96 #define PT_CLIPTEST   0x2
  97 #define PT_PIPELINE   0x4
  98 #define PT_MAX_MIDDLE 0x8
  99
 100 /**
 101  * Private context for the drawing module.
 102  */
 103 struct draw_context
 104 {
 105    /** Drawing/primitive pipeline stages */
 106    struct {
 107       struct draw_stage *first;  /**< one of the following */
 108
 109       struct draw_stage *validate;
 110
 111       /* stages (in logical order) */
 112       struct draw_stage *flatshade;
 113       struct draw_stage *clip;
 114       struct draw_stage *cull;
 115       struct draw_stage *twoside;
 116       struct draw_stage *offset;
 117       struct draw_stage *unfilled;
 118       struct draw_stage *stipple;
 119       struct draw_stage *aapoint;
 120       struct draw_stage *aaline;
 121       struct draw_stage *pstipple;
 122       struct draw_stage *wide_line;
 123       struct draw_stage *wide_point;
 124       struct draw_stage *rasterize;
 125
 126       float wide_point_threshold; /**< convert pnts to tris if larger than this */
 127       float wide_line_threshold;  /**< convert lines to tris if wider than this */
 128       boolean line_stipple;       /**< do line stipple? */
 129       boolean point_sprite;       /**< convert points to quads for sprites? */
 130
 131       /* Temporary storage while the pipeline is being run:
 132        */
 133       char *verts;
 134       unsigned vertex_stride;
 135       unsigned vertex_count;
 136    } pipeline;
 137
 138
 139    struct vbuf_render *render;
 140
 141    /* Support prototype passthrough path:
 142     */
 143    struct {
 144       struct {
 145          struct draw_pt_middle_end *fetch_emit;
 146          struct draw_pt_middle_end *general;
 147       } middle;
 148
 149       struct {
 150          struct draw_pt_front_end *vcache;
 151       } front;
 152    } pt;
 153
 154    boolean flushing;
 155
 156    /* pipe state that we need: */
 157    const struct pipe_rasterizer_state *rasterizer;
 158    struct pipe_viewport_state viewport;
 159
 160    struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
 161    unsigned nr_vertex_buffers;
 162
 163    struct pipe_vertex_element vertex_element[PIPE_MAX_ATTRIBS];
 164    unsigned nr_vertex_elements;
 165
 166    struct draw_vertex_shader *vertex_shader;
 167
 168    boolean identity_viewport;
 169
 170    uint num_vs_outputs;  /**< convenience, from vertex_shader */
 171
 172    /* user-space vertex data, buffers */
 173    struct {
 174       const unsigned *edgeflag;
 175
 176       /** vertex element/index buffer (ex: glDrawElements) */
 177       const void *elts;
 178       /** bytes per index (0, 1, 2 or 4) */
 179       unsigned eltSize;
 180
 181       /** vertex arrays */
 182       const void *vbuffer[PIPE_MAX_ATTRIBS];
 183
 184       /** constant buffer (for vertex shader) */
 185       const void *constants;
 186    } user;
 187
 188    /* Clip derived state:
 189     */
 190    float plane[12][4];
 191    unsigned nr_planes;
 192
 193    boolean use_sse;
 194
 195    /* If a prim stage introduces new vertex attributes, they'll be stored here
 196     */
 197    struct {
 198       uint semantic_name;
 199       uint semantic_index;
 200       int slot;
 201    } extra_vp_outputs;
 202
 203    unsigned reduced_prim;
 204
 205    /** TGSI program interpreter runtime state */
 206    struct tgsi_exec_machine machine;
 207
 208    /* This (and the tgsi_exec_machine struct) probably need to be moved somewhere private.
 209     */
 210    struct gallivm_cpu_engine *engine;
 211    void *driver_private;
 212 };
 213
 214
 215
 216
 217 extern void draw_reset_vertex_ids( struct draw_context *draw );
 218
 219
 220
 221 /*******************************************************************************
 222  * Vertex processing (was passthrough) code:
 223  */
 224 boolean draw_pt_init( struct draw_context *draw );
 225 void draw_pt_destroy( struct draw_context *draw );
 226 void draw_pt_reset_vertex_ids( struct draw_context *draw );
 227
 228
 229 /*******************************************************************************
 230  * Primitive processing (pipeline) code:
 231  */
 232
 233 boolean draw_pipeline_init( struct draw_context *draw );
 234 void draw_pipeline_destroy( struct draw_context *draw );
 235
 236 void draw_pipeline_run( struct draw_context *draw,
 237                         unsigned prim,
 238                         struct vertex_header *vertices,
 239                         unsigned vertex_count,
 240                         unsigned stride,
 241                         const ushort *elts,
 242                         unsigned count );
 243
 244 void draw_pipeline_flush( struct draw_context *draw,
 245                           unsigned flags );
 246
 247 boolean draw_need_pipeline(const struct draw_context *draw,
 248                            unsigned prim );
 249
 250
 251 /*******************************************************************************
 252  * Flushing
 253  */
 254
 255 #define DRAW_FLUSH_STATE_CHANGE              0x8
 256 #define DRAW_FLUSH_BACKEND                   0x10
 257
 258
 259 void draw_do_flush( struct draw_context *draw, unsigned flags );
 260
 261 boolean draw_get_edgeflag( struct draw_context *draw,
 262                            unsigned idx );
 263
 264
 265
 266
 267 #endif /* DRAW_PRIVATE_H */