src/mesa/drivers/dri/i810/i810render.c

   1 /*
   2  * Intel i810 DRI driver for Mesa 3.5
   3  *
   4  * Copyright (C) 1999-2000  Keith Whitwell   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 "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NONINFRINGEMENT.  IN NO EVENT SHALL KEITH WHITWELL BE LIABLE FOR
  20  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  21  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Author:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28
  29 /*
  30  * Render unclipped vertex buffers by emitting vertices directly to
  31  * dma buffers.  Use strip/fan hardware acceleration where possible.
  32  *
  33  */
  34 #include "glheader.h"
  35 #include "context.h"
  36 #include "macros.h"
  37 #include "imports.h"
  38 #include "mtypes.h"
  39
  40 #include "tnl/t_context.h"
  41
  42 #include "i810screen.h"
  43 #include "i810_dri.h"
  44
  45 #include "i810context.h"
  46 #include "i810tris.h"
  47 #include "i810state.h"
  48 #include "i810vb.h"
  49 #include "i810ioctl.h"
  50
  51 /*
  52  * Render unclipped vertex buffers by emitting vertices directly to
  53  * dma buffers.  Use strip/fan hardware primitives where possible.
  54  * Try to simulate missing primitives with indexed vertices.
  55  */
  56 #define HAVE_POINTS      0
  57 #define HAVE_LINES       1
  58 #define HAVE_LINE_STRIPS 1
  59 #define HAVE_TRIANGLES   1
  60 #define HAVE_TRI_STRIPS  1
  61 #define HAVE_TRI_STRIP_1 0      /* has it, template can't use it yet */
  62 #define HAVE_TRI_FANS    1
  63 #define HAVE_POLYGONS    1
  64 #define HAVE_QUADS       0
  65 #define HAVE_QUAD_STRIPS 0
  66
  67 #define HAVE_ELTS        0
  68
  69
  70 static GLuint hw_prim[GL_POLYGON+1] = {
  71    0,
  72    PR_LINES,
  73    0,
  74    PR_LINESTRIP,
  75    PR_TRIANGLES,
  76    PR_TRISTRIP_0,
  77    PR_TRIFAN,
  78    0,
  79    0,
  80    PR_POLYGON
  81 };
  82
  83 static const GLenum reduced_prim[GL_POLYGON+1] = {
  84    GL_POINTS,
  85    GL_LINES,
  86    GL_LINES,
  87    GL_LINES,
  88    GL_TRIANGLES,
  89    GL_TRIANGLES,
  90    GL_TRIANGLES,
  91    GL_TRIANGLES,
  92    GL_TRIANGLES,
  93    GL_TRIANGLES
  94 };
  95
  96 /* Fallback to normal rendering.
  97  */
  98 static void VERT_FALLBACK( GLcontext *ctx,
  99                            GLuint start,
 100                            GLuint count,
 101                            GLuint flags )
 102 {
 103    TNLcontext *tnl = TNL_CONTEXT(ctx);
 104    tnl->Driver.Render.PrimitiveNotify( ctx, flags & PRIM_MODE_MASK );
 105    tnl->Driver.Render.BuildVertices( ctx, start, count, ~0 );
 106    tnl->Driver.Render.PrimTabVerts[flags&PRIM_MODE_MASK]( ctx, start,
 107                                                           count, flags );
 108    I810_CONTEXT(ctx)->SetupNewInputs = VERT_BIT_POS;
 109 }
 110
 111
 112
 113 #define LOCAL_VARS i810ContextPtr imesa = I810_CONTEXT(ctx)
 114 #define INIT( prim ) do {                                               \
 115    I810_STATECHANGE(imesa, 0);                                          \
 116    i810RasterPrimitive( ctx, reduced_prim[prim], hw_prim[prim] );       \
 117 } while (0)
 118 #define NEW_PRIMITIVE()  I810_STATECHANGE( imesa, 0 )
 119 #define NEW_BUFFER()  I810_FIREVERTICES( imesa )
 120 #define GET_CURRENT_VB_MAX_VERTS() \
 121   (((int)imesa->vertex_high - (int)imesa->vertex_low) / (imesa->vertex_size*4))
 122 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
 123   (I810_DMA_BUF_SZ-4) / (imesa->vertex_size * 4)
 124
 125
 126 #define EMIT_VERTS( ctx, j, nr ) \
 127   i810_emit_contiguous_verts(ctx, j, (j)+(nr))
 128
 129
 130 #define TAG(x) i810_##x
 131 #include "tnl_dd/t_dd_dmatmp.h"
 132
 133
 134 /**********************************************************************/
 135 /*                          Render pipeline stage                     */
 136 /**********************************************************************/
 137
 138
 139 static GLboolean i810_run_render( GLcontext *ctx,
 140                                   struct tnl_pipeline_stage *stage )
 141 {
 142    i810ContextPtr imesa = I810_CONTEXT(ctx);
 143    TNLcontext *tnl = TNL_CONTEXT(ctx);
 144    struct vertex_buffer *VB = &tnl->vb;
 145    GLuint i;
 146
 147    /* Don't handle clipping or indexed vertices.
 148     */
 149    if (VB->ClipOrMask || imesa->RenderIndex != 0 || VB->Elts) {
 150       return GL_TRUE;
 151    }
 152
 153    imesa->SetupNewInputs = VERT_BIT_POS;
 154
 155    tnl->Driver.Render.Start( ctx );
 156
 157    for (i = 0 ; i < VB->PrimitiveCount ; i++)
 158    {
 159       GLuint prim = VB->Primitive[i].mode;
 160       GLuint start = VB->Primitive[i].start;
 161       GLuint length = VB->Primitive[i].count;
 162
 163       if (!length)
 164          continue;
 165
 166       i810_render_tab_verts[prim & PRIM_MODE_MASK]( ctx, start, start + length,
 167                                                     prim );
 168    }
 169
 170    tnl->Driver.Render.Finish( ctx );
 171
 172    return GL_FALSE;             /* finished the pipe */
 173 }
 174
 175
 176 static void i810_check_render( GLcontext *ctx, struct tnl_pipeline_stage *stage )
 177 {
 178    GLuint inputs = VERT_BIT_POS | VERT_BIT_COLOR0;
 179
 180    if (ctx->RenderMode == GL_RENDER) {
 181       if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR)
 182          inputs |= VERT_BIT_COLOR1;
 183
 184       if (ctx->Texture.Unit[0]._ReallyEnabled)
 185          inputs |= VERT_BIT_TEX0;
 186
 187       if (ctx->Texture.Unit[1]._ReallyEnabled)
 188          inputs |= VERT_BIT_TEX1;
 189
 190       if (ctx->Fog.Enabled)
 191          inputs |= VERT_BIT_FOG;
 192    }
 193
 194    stage->inputs = inputs;
 195 }
 196
 197
 198 static void dtr( struct tnl_pipeline_stage *stage )
 199 {
 200    (void)stage;
 201 }
 202
 203
 204 const struct tnl_pipeline_stage _i810_render_stage =
 205 {
 206    "i810 render",
 207    (_DD_NEW_SEPARATE_SPECULAR |
 208     _NEW_TEXTURE|
 209     _NEW_FOG|
 210     _NEW_RENDERMODE),           /* re-check (new inputs) */
 211    0,                           /* re-run (always runs) */
 212    GL_TRUE,                     /* active */
 213    0, 0,                        /* inputs (set in check_render), outputs */
 214    0, 0,                        /* changed_inputs, private */
 215    dtr,                         /* destructor */
 216    i810_check_render,           /* check - initially set to alloc data */
 217    i810_run_render              /* run */
 218 };