src/gallium/drivers/svga/svga_draw_private.h

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  25
  26 #ifndef SVGA_DRAW_H_
  27 #define SVGA_DRAW_H_
  28
  29 #include "pipe/p_compiler.h"
  30 #include "pipe/p_defines.h"
  31 #include "indices/u_indices.h"
  32 #include "util/u_prim.h"
  33 #include "svga_context.h"
  34 #include "svga_hw_reg.h"
  35 #include "svga3d_shaderdefs.h"
  36
  37 struct svga_context;
  38 struct u_upload_mgr;
  39
  40 /**
  41  * Mask indicating which types of gallium primitives are actually
  42  * handled by the svga device.  Other types will be converted to
  43  * these types by the index/translation code.
  44  */
  45 static const unsigned svga_hw_prims =
  46    ((1 << PIPE_PRIM_POINTS) |
  47     (1 << PIPE_PRIM_LINES) |
  48     (1 << PIPE_PRIM_LINE_STRIP) |
  49     (1 << PIPE_PRIM_TRIANGLES) |
  50     (1 << PIPE_PRIM_TRIANGLE_STRIP) |
  51     (1 << PIPE_PRIM_TRIANGLE_FAN) |
  52     (1 << PIPE_PRIM_LINES_ADJACENCY) |
  53     (1 << PIPE_PRIM_LINE_STRIP_ADJACENCY) |
  54     (1 << PIPE_PRIM_TRIANGLES_ADJACENCY) |
  55     (1 << PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY));
  56
  57
  58 /**
  59  * Translate a gallium PIPE_PRIM_x value to an SVGA3D_PRIMITIVE_x value.
  60  * Also, compute the number of primitives that'll be drawn given a
  61  * vertex count.
  62  * Note that this function doesn't have to handle PIPE_PRIM_LINE_LOOP,
  63  * PIPE_PRIM_QUADS, PIPE_PRIM_QUAD_STRIP or PIPE_PRIM_POLYGON.  We convert
  64  * those to other types of primitives with index/translation code.
  65  */
  66 static inline SVGA3dPrimitiveType
  67 svga_translate_prim(unsigned mode, unsigned vcount, unsigned *prim_count)
  68 {
  69    switch (mode) {
  70    case PIPE_PRIM_POINTS:
  71       *prim_count = vcount;
  72       return SVGA3D_PRIMITIVE_POINTLIST;
  73
  74    case PIPE_PRIM_LINES:
  75       *prim_count = vcount / 2;
  76       return SVGA3D_PRIMITIVE_LINELIST;
  77
  78    case PIPE_PRIM_LINE_STRIP:
  79       *prim_count = vcount - 1;
  80       return SVGA3D_PRIMITIVE_LINESTRIP;
  81
  82    case PIPE_PRIM_TRIANGLES:
  83       *prim_count = vcount / 3;
  84       return SVGA3D_PRIMITIVE_TRIANGLELIST;
  85
  86    case PIPE_PRIM_TRIANGLE_STRIP:
  87       *prim_count = vcount - 2;
  88       return SVGA3D_PRIMITIVE_TRIANGLESTRIP;
  89
  90    case PIPE_PRIM_TRIANGLE_FAN:
  91       *prim_count = vcount - 2;
  92       return SVGA3D_PRIMITIVE_TRIANGLEFAN;
  93
  94    case PIPE_PRIM_LINES_ADJACENCY:
  95       *prim_count = vcount / 4;
  96       return SVGA3D_PRIMITIVE_LINELIST_ADJ;
  97
  98    case PIPE_PRIM_LINE_STRIP_ADJACENCY:
  99       *prim_count = vcount - 3;
 100       return SVGA3D_PRIMITIVE_LINESTRIP_ADJ;
 101
 102    case PIPE_PRIM_TRIANGLES_ADJACENCY:
 103       *prim_count = vcount / 6;
 104       return SVGA3D_PRIMITIVE_TRIANGLELIST_ADJ;
 105
 106    case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY:
 107       *prim_count = vcount / 2 - 2 ;
 108       return SVGA3D_PRIMITIVE_TRIANGLESTRIP_ADJ;
 109
 110    default:
 111       assert(0);
 112       *prim_count = 0;
 113       return 0;
 114    }
 115 }
 116
 117
 118 struct index_cache {
 119    u_generate_func generate;
 120    unsigned gen_nr;
 121
 122    /* If non-null, this buffer is filled by calling
 123     *   generate(nr, map(buffer))
 124     */
 125    struct pipe_resource *buffer;
 126 };
 127
 128
 129 /** Max number of primitives per draw call */
 130 #define QSZ SVGA3D_MAX_DRAW_PRIMITIVE_RANGES
 131
 132 struct draw_cmd {
 133    struct svga_winsys_context *swc;
 134
 135    /* vertex layout info */
 136    SVGA3dVertexDecl vdecl[SVGA3D_INPUTREG_MAX];
 137    unsigned vdecl_count;
 138    SVGA3dElementLayoutId vdecl_layout_id;
 139    unsigned vdecl_buffer_index[SVGA3D_INPUTREG_MAX];
 140
 141    /* vertex buffer info */
 142    struct pipe_vertex_buffer vbufs[SVGA3D_INPUTREG_MAX];
 143    unsigned vbuf_count;
 144
 145    SVGA3dPrimitiveRange prim[QSZ];
 146    struct pipe_resource *prim_ib[QSZ];
 147    unsigned prim_count;   /**< number of primitives for this draw */
 148    unsigned min_index[QSZ];
 149    unsigned max_index[QSZ];
 150 };
 151
 152 #define IDX_CACHE_MAX  8
 153
 154 struct svga_hwtnl {
 155    struct svga_context *svga;
 156    struct u_upload_mgr *upload_ib;
 157
 158    /* Additional negative index bias due to partial buffer uploads
 159     * This is compensated for in the offset associated with all
 160     * vertex buffers.
 161     */
 162    int index_bias;
 163
 164    /* Provoking vertex information (for flat shading). */
 165    unsigned api_pv;  /**< app-requested PV mode (PV_FIRST or PV_LAST) */
 166    unsigned hw_pv;   /**< device-supported PV mode (PV_FIRST or PV_LAST) */
 167
 168    /* The triangle fillmode for the device (one of PIPE_POLYGON_MODE_{FILL,
 169     * LINE,POINT}).  If the polygon front mode matches the back mode,
 170     * api_fillmode will be that mode.  Otherwise, api_fillmode will be
 171     * PIPE_POLYGON_MODE_FILL.
 172     */
 173    unsigned api_fillmode;
 174
 175    /* Cache the results of running a particular generate func on each
 176     * primitive type.
 177     */
 178    struct index_cache index_cache[PIPE_PRIM_MAX][IDX_CACHE_MAX];
 179
 180    /* Try to build the maximal draw command packet before emitting:
 181     */
 182    struct draw_cmd cmd;
 183 };
 184
 185
 186
 187 /**
 188  * Do we need to use the gallium 'indices' helper to render unfilled
 189  * triangles?
 190  */
 191 static inline boolean
 192 svga_need_unfilled_fallback(const struct svga_hwtnl *hwtnl,
 193                             enum pipe_prim_type prim)
 194 {
 195    const struct svga_context *svga = hwtnl->svga;
 196
 197    if (u_reduced_prim(prim) != PIPE_PRIM_TRIANGLES) {
 198       /* if we're drawing points or lines, no fallback needed */
 199       return FALSE;
 200    }
 201
 202    if (svga_have_vgpu10(svga)) {
 203       /* vgpu10 supports polygon fill and line modes */
 204       if ((prim == PIPE_PRIM_QUADS ||
 205            prim == PIPE_PRIM_QUAD_STRIP ||
 206            prim == PIPE_PRIM_POLYGON) &&
 207           hwtnl->api_fillmode == PIPE_POLYGON_MODE_LINE) {
 208          /* VGPU10 doesn't directly render quads or polygons.  They're
 209           * converted to triangles.  If we let the device draw the triangle
 210           * outlines we'll get an extra, stray lines in the interiors.
 211           * So, to draw unfilled quads correctly, we need the fallback.
 212           */
 213          return true;
 214       }
 215       return hwtnl->api_fillmode == PIPE_POLYGON_MODE_POINT;
 216    } else {
 217       /* vgpu9 doesn't support line or point fill modes */
 218       return hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL;
 219    }
 220 }
 221
 222
 223 enum pipe_error
 224 svga_hwtnl_prim( struct svga_hwtnl *hwtnl,
 225                  const SVGA3dPrimitiveRange *range,
 226                  unsigned vcount,
 227                  unsigned min_index,
 228                  unsigned max_index,
 229                  struct pipe_resource *ib,
 230                  unsigned start_instance, unsigned instance_count);
 231
 232 enum pipe_error
 233 svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
 234                                        struct pipe_resource *indexBuffer,
 235                                        unsigned index_size,
 236                                        int index_bias,
 237                                        unsigned min_index,
 238                                        unsigned max_index,
 239                                        enum pipe_prim_type prim,
 240                                        unsigned start,
 241                                        unsigned count,
 242                                        unsigned start_instance,
 243                                        unsigned instance_count);
 244
 245
 246 #endif