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      1
  58 #define HAVE_LINES       1
  59 #define HAVE_LINE_STRIPS 1
  60 #define HAVE_TRIANGLES   1
  61 #define HAVE_TRI_STRIPS  1
  62 #define HAVE_TRI_FANS    1
  63 #define HAVE_POLYGONS    1
  64
  65 #define HAVE_ELTS        0
  66
  67 static const uint32_t hw_prim[GL_POLYGON + 1] = {
  68    [GL_POINTS] = PRIM3D_POINTLIST,
  69    [GL_LINES ] = PRIM3D_LINELIST,
  70    [GL_LINE_LOOP] = PRIM3D_LINESTRIP,
  71    [GL_LINE_STRIP] = PRIM3D_LINESTRIP,
  72    [GL_TRIANGLES] = PRIM3D_TRILIST,
  73    [GL_TRIANGLE_STRIP] = PRIM3D_TRISTRIP,
  74    [GL_TRIANGLE_FAN] = PRIM3D_TRIFAN,
  75    [GL_QUADS] = 0,
  76    [GL_QUAD_STRIP] = 0,
  77    [GL_POLYGON] = PRIM3D_POLY,
  78 };
  79
  80 static const GLenum reduced_prim[GL_POLYGON + 1] = {
  81    [GL_POINTS] = GL_POINTS,
  82    [GL_LINES] = GL_LINES,
  83    [GL_LINE_LOOP] = GL_LINES,
  84    [GL_LINE_STRIP] = GL_LINES,
  85    [GL_TRIANGLES] = GL_TRIANGLES,
  86    [GL_TRIANGLE_STRIP] = GL_TRIANGLES,
  87    [GL_TRIANGLE_FAN] = GL_TRIANGLES,
  88    [GL_QUADS] = GL_TRIANGLES,
  89    [GL_QUAD_STRIP] = GL_TRIANGLES,
  90    [GL_POLYGON] = GL_TRIANGLES,
  91 };
  92
  93 static const int scale_prim[GL_POLYGON + 1] = {
  94    [GL_POINTS] = 1,
  95    [GL_LINES] = 1,
  96    [GL_LINE_LOOP] = 2,
  97    [GL_LINE_STRIP] = 2,
  98    [GL_TRIANGLES] = 1,
  99    [GL_TRIANGLE_STRIP] = 3,
 100    [GL_TRIANGLE_FAN] = 3,
 101    [GL_QUADS] = 0,              /* fallback case */
 102    [GL_QUAD_STRIP] = 0,         /* fallback case */
 103    [GL_POLYGON] = 3,
 104 };
 105
 106
 107 static void
 108 intelDmaPrimitive(struct intel_context *intel, GLenum prim)
 109 {
 110    if (0)
 111       fprintf(stderr, "%s %s\n", __func__, _mesa_enum_to_string(prim));
 112    INTEL_FIREVERTICES(intel);
 113    intel->vtbl.reduced_primitive_state(intel, reduced_prim[prim]);
 114    intel_set_prim(intel, hw_prim[prim]);
 115 }
 116
 117 #define INTEL_NO_VBO_STATE_RESERVED 1500
 118
 119 static inline GLuint intel_get_vb_max(struct intel_context *intel)
 120 {
 121    GLuint ret;
 122
 123    if (intel->intelScreen->no_vbo) {
 124       ret = intel->batch.bo->size - INTEL_NO_VBO_STATE_RESERVED;
 125    } else
 126       ret = INTEL_VB_SIZE;
 127    ret /= (intel->vertex_size * 4);
 128    return ret;
 129 }
 130
 131 static inline GLuint intel_get_current_max(struct intel_context *intel)
 132 {
 133    GLuint ret;
 134
 135    if (intel->intelScreen->no_vbo) {
 136       ret = intel_batchbuffer_space(intel);
 137       ret = ret <= INTEL_NO_VBO_STATE_RESERVED ? 0 : ret - INTEL_NO_VBO_STATE_RESERVED;
 138    } else
 139       ret = (INTEL_VB_SIZE - intel->prim.current_offset);
 140
 141    return ret / (intel->vertex_size * 4);
 142 }
 143
 144 #define LOCAL_VARS struct intel_context *intel = intel_context(ctx)
 145 #define INIT( prim )                            \
 146 do {                                            \
 147    intelDmaPrimitive( intel, prim );            \
 148 } while (0)
 149
 150 #define FLUSH() INTEL_FIREVERTICES(intel)
 151
 152 #define GET_SUBSEQUENT_VB_MAX_VERTS() intel_get_vb_max(intel)
 153 #define GET_CURRENT_VB_MAX_VERTS() intel_get_current_max(intel)
 154
 155 #define ALLOC_VERTS(nr) intel_get_prim_space(intel, nr)
 156
 157 #define EMIT_VERTS( ctx, j, nr, buf ) \
 158   _tnl_emit_vertices_to_buffer(ctx, j, (j)+(nr), buf )
 159
 160 #define TAG(x) intel_##x
 161 #include "tnl_dd/t_dd_dmatmp.h"
 162
 163
 164 /**********************************************************************/
 165 /*                          Render pipeline stage                     */
 166 /**********************************************************************/
 167
 168 /* Heuristic to choose between the two render paths:
 169  */
 170 static bool
 171 choose_render(struct intel_context *intel, struct vertex_buffer *VB)
 172 {
 173    int vertsz = intel->vertex_size;
 174    int cost_render = 0;
 175    int cost_fallback = 0;
 176    int nr_prims = 0;
 177    int nr_rprims = 0;
 178    int nr_rverts = 0;
 179    int rprim = intel->reduced_primitive;
 180    int i = 0;
 181
 182    for (i = 0; i < VB->PrimitiveCount; i++) {
 183       GLuint prim = VB->Primitive[i].mode;
 184       GLuint length = VB->Primitive[i].count;
 185
 186       if (!length)
 187          continue;
 188
 189       nr_prims++;
 190       nr_rverts += length * scale_prim[prim & PRIM_MODE_MASK];
 191
 192       if (reduced_prim[prim & PRIM_MODE_MASK] != rprim) {
 193          nr_rprims++;
 194          rprim = reduced_prim[prim & PRIM_MODE_MASK];
 195       }
 196    }
 197
 198    /* One point for each generated primitive:
 199     */
 200    cost_render = nr_prims;
 201    cost_fallback = nr_rprims;
 202
 203    /* One point for every 1024 dwords (4k) of dma:
 204     */
 205    cost_render += (vertsz * i) / 1024;
 206    cost_fallback += (vertsz * nr_rverts) / 1024;
 207
 208    if (0)
 209       fprintf(stderr, "cost render: %d fallback: %d\n",
 210               cost_render, cost_fallback);
 211
 212    if (cost_render > cost_fallback)
 213       return false;
 214
 215    return true;
 216 }
 217
 218
 219 static GLboolean
 220 intel_run_render(struct gl_context * ctx, struct tnl_pipeline_stage *stage)
 221 {
 222    struct intel_context *intel = intel_context(ctx);
 223    TNLcontext *tnl = TNL_CONTEXT(ctx);
 224    struct vertex_buffer *VB = &tnl->vb;
 225    GLuint i;
 226
 227    intel->vtbl.render_prevalidate( intel );
 228
 229    /* Don't handle clipping or indexed vertices.
 230     */
 231    if (intel->RenderIndex != 0 ||
 232        !intel_validate_render(ctx, VB) || !choose_render(intel, VB)) {
 233       return true;
 234    }
 235
 236    tnl->clipspace.new_inputs |= VERT_BIT_POS;
 237
 238    tnl->Driver.Render.Start(ctx);
 239
 240    for (i = 0; i < VB->PrimitiveCount; i++) {
 241       GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
 242       GLuint start = VB->Primitive[i].start;
 243       GLuint length = VB->Primitive[i].count;
 244
 245       if (!length)
 246          continue;
 247
 248       intel_render_tab_verts[prim & PRIM_MODE_MASK] (ctx, start,
 249                                                      length, prim);
 250    }
 251
 252    tnl->Driver.Render.Finish(ctx);
 253
 254    INTEL_FIREVERTICES(intel);
 255
 256    return false;             /* finished the pipe */
 257 }
 258
 259 static const struct tnl_pipeline_stage _intel_render_stage = {
 260    "intel render",
 261    NULL,
 262    NULL,
 263    NULL,
 264    NULL,
 265    intel_run_render             /* run */
 266 };
 267
 268 const struct tnl_pipeline_stage *intel_pipeline[] = {
 269    &_tnl_vertex_transform_stage,
 270    &_tnl_normal_transform_stage,
 271    &_tnl_lighting_stage,
 272    &_tnl_fog_coordinate_stage,
 273    &_tnl_texgen_stage,
 274    &_tnl_texture_transform_stage,
 275    &_tnl_point_attenuation_stage,
 276    &_tnl_vertex_program_stage,
 277 #if 1
 278    &_intel_render_stage,        /* ADD: unclipped rastersetup-to-dma */
 279 #endif
 280    &_tnl_render_stage,
 281    0,
 282 };