src/mesa/drivers/dri/i915/intel_render.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 /*
  29  * Render unclipped vertex buffers by emitting vertices directly to
  30  * dma buffers.  Use strip/fan hardware acceleration where possible.
  31  *
  32  */
  33 #include "main/glheader.h"
  34 #include "main/context.h"
  35 #include "main/macros.h"
  36 #include "main/imports.h"
  37 #include "main/mtypes.h"
  38 #include "main/enums.h"
  39
  40 #include "math/m_xform.h"
  41
  42 #include "tnl/t_context.h"
  43 #include "tnl/t_vertex.h"
  44 #include "tnl/t_pipeline.h"
  45
  46 #include "intel_screen.h"
  47 #include "intel_context.h"
  48 #include "intel_tris.h"
  49 #include "intel_batchbuffer.h"
  50 #include "intel_reg.h"
  51
  52 /*
  53  * Render unclipped vertex buffers by emitting vertices directly to
  54  * dma buffers.  Use strip/fan hardware primitives where possible.
  55  * Try to simulate missing primitives with indexed vertices.
  56  */
  57 #define HAVE_POINTS      0      /* Has it, but can't use because subpixel has to
  58                                  * be adjusted for points on the INTEL/I845G
  59                                  */
  60 #define HAVE_LINES       1
  61 #define HAVE_LINE_STRIPS 1
  62 #define HAVE_TRIANGLES   1
  63 #define HAVE_TRI_STRIPS  1
  64 #define HAVE_TRI_STRIP_1 0      /* has it, template can't use it yet */
  65 #define HAVE_TRI_FANS    1
  66 #define HAVE_POLYGONS    1
  67 #define HAVE_QUADS       0
  68 #define HAVE_QUAD_STRIPS 0
  69
  70 #define HAVE_ELTS        0
  71
  72 static uint32_t hw_prim[GL_POLYGON + 1] = {
  73    0,
  74    PRIM3D_LINELIST,
  75    PRIM3D_LINESTRIP,
  76    PRIM3D_LINESTRIP,
  77    PRIM3D_TRILIST,
  78    PRIM3D_TRISTRIP,
  79    PRIM3D_TRIFAN,
  80    0,
  81    0,
  82    PRIM3D_POLY
  83 };
  84
  85 static const GLenum reduced_prim[GL_POLYGON + 1] = {
  86    GL_POINTS,
  87    GL_LINES,
  88    GL_LINES,
  89    GL_LINES,
  90    GL_TRIANGLES,
  91    GL_TRIANGLES,
  92    GL_TRIANGLES,
  93    GL_TRIANGLES,
  94    GL_TRIANGLES,
  95    GL_TRIANGLES
  96 };
  97
  98 static const int scale_prim[GL_POLYGON + 1] = {
  99    0,                           /* fallback case */
 100    1,
 101    2,
 102    2,
 103    1,
 104    3,
 105    3,
 106    0,                           /* fallback case */
 107    0,                           /* fallback case */
 108    3
 109 };
 110
 111
 112 static void
 113 intelDmaPrimitive(struct intel_context *intel, GLenum prim)
 114 {
 115    if (0)
 116       fprintf(stderr, "%s %s\n", __func__, _mesa_enum_to_string(prim));
 117    INTEL_FIREVERTICES(intel);
 118    intel->vtbl.reduced_primitive_state(intel, reduced_prim[prim]);
 119    intel_set_prim(intel, hw_prim[prim]);
 120 }
 121
 122 #define INTEL_NO_VBO_STATE_RESERVED 1500
 123
 124 static inline GLuint intel_get_vb_max(struct intel_context *intel)
 125 {
 126    GLuint ret;
 127
 128    if (intel->intelScreen->no_vbo) {
 129       ret = intel->batch.bo->size - INTEL_NO_VBO_STATE_RESERVED;
 130    } else
 131       ret = INTEL_VB_SIZE;
 132    ret /= (intel->vertex_size * 4);
 133    return ret;
 134 }
 135
 136 static inline GLuint intel_get_current_max(struct intel_context *intel)
 137 {
 138    GLuint ret;
 139
 140    if (intel->intelScreen->no_vbo) {
 141       ret = intel_batchbuffer_space(intel);
 142       ret = ret <= INTEL_NO_VBO_STATE_RESERVED ? 0 : ret - INTEL_NO_VBO_STATE_RESERVED;
 143    } else
 144       ret = (INTEL_VB_SIZE - intel->prim.current_offset);
 145
 146    return ret / (intel->vertex_size * 4);
 147 }
 148
 149 #define LOCAL_VARS struct intel_context *intel = intel_context(ctx)
 150 #define INIT( prim )                            \
 151 do {                                            \
 152    intelDmaPrimitive( intel, prim );            \
 153 } while (0)
 154
 155 #define FLUSH() INTEL_FIREVERTICES(intel)
 156
 157 #define GET_SUBSEQUENT_VB_MAX_VERTS() intel_get_vb_max(intel)
 158 #define GET_CURRENT_VB_MAX_VERTS() intel_get_current_max(intel)
 159
 160 #define ALLOC_VERTS(nr) intel_get_prim_space(intel, nr)
 161
 162 #define EMIT_VERTS( ctx, j, nr, buf ) \
 163   _tnl_emit_vertices_to_buffer(ctx, j, (j)+(nr), buf )
 164
 165 #define TAG(x) intel_##x
 166 #include "tnl_dd/t_dd_dmatmp.h"
 167
 168
 169 /**********************************************************************/
 170 /*                          Render pipeline stage                     */
 171 /**********************************************************************/
 172
 173 /* Heuristic to choose between the two render paths:
 174  */
 175 static bool
 176 choose_render(struct intel_context *intel, struct vertex_buffer *VB)
 177 {
 178    int vertsz = intel->vertex_size;
 179    int cost_render = 0;
 180    int cost_fallback = 0;
 181    int nr_prims = 0;
 182    int nr_rprims = 0;
 183    int nr_rverts = 0;
 184    int rprim = intel->reduced_primitive;
 185    int i = 0;
 186
 187    for (i = 0; i < VB->PrimitiveCount; i++) {
 188       GLuint prim = VB->Primitive[i].mode;
 189       GLuint length = VB->Primitive[i].count;
 190
 191       if (!length)
 192          continue;
 193
 194       nr_prims++;
 195       nr_rverts += length * scale_prim[prim & PRIM_MODE_MASK];
 196
 197       if (reduced_prim[prim & PRIM_MODE_MASK] != rprim) {
 198          nr_rprims++;
 199          rprim = reduced_prim[prim & PRIM_MODE_MASK];
 200       }
 201    }
 202
 203    /* One point for each generated primitive:
 204     */
 205    cost_render = nr_prims;
 206    cost_fallback = nr_rprims;
 207
 208    /* One point for every 1024 dwords (4k) of dma:
 209     */
 210    cost_render += (vertsz * i) / 1024;
 211    cost_fallback += (vertsz * nr_rverts) / 1024;
 212
 213    if (0)
 214       fprintf(stderr, "cost render: %d fallback: %d\n",
 215               cost_render, cost_fallback);
 216
 217    if (cost_render > cost_fallback)
 218       return false;
 219
 220    return true;
 221 }
 222
 223
 224 static GLboolean
 225 intel_run_render(struct gl_context * ctx, struct tnl_pipeline_stage *stage)
 226 {
 227    struct intel_context *intel = intel_context(ctx);
 228    TNLcontext *tnl = TNL_CONTEXT(ctx);
 229    struct vertex_buffer *VB = &tnl->vb;
 230    GLuint i;
 231
 232    intel->vtbl.render_prevalidate( intel );
 233
 234    /* Don't handle clipping or indexed vertices.
 235     */
 236    if (intel->RenderIndex != 0 ||
 237        !intel_validate_render(ctx, VB) || !choose_render(intel, VB)) {
 238       return true;
 239    }
 240
 241    tnl->clipspace.new_inputs |= VERT_BIT_POS;
 242
 243    tnl->Driver.Render.Start(ctx);
 244
 245    for (i = 0; i < VB->PrimitiveCount; i++) {
 246       GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
 247       GLuint start = VB->Primitive[i].start;
 248       GLuint length = VB->Primitive[i].count;
 249
 250       if (!length)
 251          continue;
 252
 253       intel_render_tab_verts[prim & PRIM_MODE_MASK] (ctx, start,
 254                                                      length, prim);
 255    }
 256
 257    tnl->Driver.Render.Finish(ctx);
 258
 259    INTEL_FIREVERTICES(intel);
 260
 261    return false;             /* finished the pipe */
 262 }
 263
 264 static const struct tnl_pipeline_stage _intel_render_stage = {
 265    "intel render",
 266    NULL,
 267    NULL,
 268    NULL,
 269    NULL,
 270    intel_run_render             /* run */
 271 };
 272
 273 const struct tnl_pipeline_stage *intel_pipeline[] = {
 274    &_tnl_vertex_transform_stage,
 275    &_tnl_normal_transform_stage,
 276    &_tnl_lighting_stage,
 277    &_tnl_fog_coordinate_stage,
 278    &_tnl_texgen_stage,
 279    &_tnl_texture_transform_stage,
 280    &_tnl_point_attenuation_stage,
 281    &_tnl_vertex_program_stage,
 282 #if 1
 283    &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
 284 #endif
 285    &_tnl_render_stage,
 286    0,
 287 };