src/gallium/drivers/llvmpipe/lp_rast.h

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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  16  * of the Software.
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  27
  28 /**
  29  * The rast code is concerned with rasterization of command bins.
  30  * Each screen tile has a bin associated with it.  To render the
  31  * scene we iterate over the tile bins and execute the commands
  32  * in each bin.
  33  * We'll do that with multiple threads...
  34  */
  35
  36
  37 #ifndef LP_RAST_H
  38 #define LP_RAST_H
  39
  40 #include "pipe/p_compiler.h"
  41 #include "lp_jit.h"
  42
  43
  44 struct lp_rasterizer;
  45 struct lp_scene;
  46 struct lp_scene_queue;
  47 struct lp_fence;
  48 struct cmd_bin;
  49 struct pipe_screen;
  50
  51 /** For sub-pixel positioning */
  52 #define FIXED_ORDER 4
  53 #define FIXED_ONE (1<<FIXED_ORDER)
  54
  55
  56 /**
  57  * Rasterization state.
  58  * Objects of this type are put into the shared data bin and pointed
  59  * to by commands in the per-tile bins.
  60  */
  61 struct lp_rast_state {
  62    /* State for the shader.  This also contains state which feeds into
  63     * the fragment shader, such as blend color and alpha ref value.
  64     */
  65    struct lp_jit_context jit_context;
  66
  67    /* The shader itself.  Probably we also need to pass a pointer to
  68     * the tile color/z/stencil data somehow:
  69     */
  70    lp_jit_frag_func jit_function;
  71
  72    boolean opaque;
  73 };
  74
  75
  76 /**
  77  * Coefficients necessary to run the shader at a given location.
  78  * First coefficient is position.
  79  * These pointers point into the bin data buffer.
  80  */
  81 struct lp_rast_shader_inputs {
  82    float (*a0)[4];
  83    float (*dadx)[4];
  84    float (*dady)[4];
  85
  86    /* edge/step info for 3 edges and 4x4 block of pixels */
  87    int ALIGN16_ATTRIB step[3][16];
  88 };
  89
  90
  91 /**
  92  * Rasterization information for a triangle known to be in this bin,
  93  * plus inputs to run the shader:
  94  * These fields are tile- and bin-independent.
  95  * Objects of this type are put into the setup_context::data buffer.
  96  */
  97 struct lp_rast_triangle {
  98    /* bounding box of tri (in pixels) */
  99    int minx;
 100    int maxx;
 101    int miny;
 102    int maxy;
 103
 104    /* one-pixel sized trivial accept offsets for each plane */
 105    int ei1;
 106    int ei2;
 107    int ei3;
 108
 109    /* one-pixel sized trivial reject offsets for each plane */
 110    int eo1;
 111    int eo2;
 112    int eo3;
 113
 114    /* y deltas for vertex pairs (in fixed pt) */
 115    int dy12;
 116    int dy23;
 117    int dy31;
 118
 119    /* x deltas for vertex pairs (in fixed pt) */
 120    int dx12;
 121    int dx23;
 122    int dx31;
 123
 124    /* edge function values at minx,miny ?? */
 125    int c1, c2, c3;
 126
 127    /* inputs for the shader */
 128    struct lp_rast_shader_inputs ALIGN16_ATTRIB inputs;
 129 };
 130
 131
 132
 133 struct lp_rasterizer *lp_rast_create( struct pipe_screen *screen,
 134                                       struct lp_scene_queue *empty );
 135
 136 void lp_rast_destroy( struct lp_rasterizer * );
 137
 138 unsigned lp_rast_get_num_threads( struct lp_rasterizer * );
 139
 140 void lp_rasterize_scene( struct lp_rasterizer *rast,
 141                          struct lp_scene *scene,
 142                          const struct pipe_framebuffer_state *fb,
 143                          bool write_depth );
 144
 145
 146
 147 union lp_rast_cmd_arg {
 148    const struct lp_rast_shader_inputs *shade_tile;
 149    const struct lp_rast_triangle *triangle;
 150    const struct lp_rast_state *set_state;
 151    uint8_t clear_color[4];
 152    unsigned clear_zstencil;
 153    struct lp_fence *fence;
 154 };
 155
 156
 157 /* Cast wrappers.  Hopefully these compile to noops!
 158  */
 159 static INLINE const union lp_rast_cmd_arg
 160 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 161 {
 162    union lp_rast_cmd_arg arg;
 163    arg.shade_tile = shade_tile;
 164    return arg;
 165 }
 166
 167 static INLINE const union lp_rast_cmd_arg
 168 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle )
 169 {
 170    union lp_rast_cmd_arg arg;
 171    arg.triangle = triangle;
 172    return arg;
 173 }
 174
 175 static INLINE const union lp_rast_cmd_arg
 176 lp_rast_arg_state( const struct lp_rast_state *state )
 177 {
 178    union lp_rast_cmd_arg arg;
 179    arg.set_state = state;
 180    return arg;
 181 }
 182
 183 static INLINE const union lp_rast_cmd_arg
 184 lp_rast_arg_fence( struct lp_fence *fence )
 185 {
 186    union lp_rast_cmd_arg arg;
 187    arg.fence = fence;
 188    return arg;
 189 }
 190
 191
 192 static INLINE const union lp_rast_cmd_arg
 193 lp_rast_arg_null( void )
 194 {
 195    union lp_rast_cmd_arg arg;
 196    arg.set_state = NULL;
 197    return arg;
 198 }
 199
 200
 201
 202 /**
 203  * Binnable Commands.
 204  * These get put into bins by the setup code and are called when
 205  * the bins are executed.
 206  */
 207
 208 void lp_rast_clear_color( struct lp_rasterizer *,
 209                           unsigned thread_index,
 210                           const union lp_rast_cmd_arg );
 211
 212 void lp_rast_clear_zstencil( struct lp_rasterizer *,
 213                              unsigned thread_index,
 214                              const union lp_rast_cmd_arg );
 215
 216 void lp_rast_load_color( struct lp_rasterizer *,
 217                          unsigned thread_index,
 218                          const union lp_rast_cmd_arg );
 219
 220 void lp_rast_load_zstencil( struct lp_rasterizer *,
 221                             unsigned thread_index,
 222                             const union lp_rast_cmd_arg );
 223
 224 void lp_rast_set_state( struct lp_rasterizer *,
 225                         unsigned thread_index,
 226                         const union lp_rast_cmd_arg );
 227
 228 void lp_rast_triangle( struct lp_rasterizer *,
 229                        unsigned thread_index,
 230                        const union lp_rast_cmd_arg );
 231
 232 void lp_rast_shade_tile( struct lp_rasterizer *,
 233                          unsigned thread_index,
 234                          const union lp_rast_cmd_arg );
 235
 236 void lp_rast_fence( struct lp_rasterizer *,
 237                     unsigned thread_index,
 238                     const union lp_rast_cmd_arg );
 239
 240 #endif