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 "main/glheader.h"
  35 #include "main/context.h"
  36 #include "main/macros.h"
  37 #include "main/imports.h"
  38 #include "main/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 "i810vb.h"
  48 #include "i810ioctl.h"
  49
  50 /*
  51  * Render unclipped vertex buffers by emitting vertices directly to
  52  * dma buffers.  Use strip/fan hardware primitives where possible.
  53  * Try to simulate missing primitives with indexed vertices.
  54  */
  55 #define HAVE_POINTS      0
  56 #define HAVE_LINES       1
  57 #define HAVE_LINE_STRIPS 1
  58 #define HAVE_TRIANGLES   1
  59 #define HAVE_TRI_STRIPS  1
  60 #define HAVE_TRI_STRIP_1 0      /* has it, template can't use it yet */
  61 #define HAVE_TRI_FANS    1
  62 #define HAVE_POLYGONS    1
  63 #define HAVE_QUADS       0
  64 #define HAVE_QUAD_STRIPS 0
  65
  66 #define HAVE_ELTS        0
  67
  68
  69 static GLuint hw_prim[GL_POLYGON+1] = {
  70    0,
  71    PR_LINES,
  72    0,
  73    PR_LINESTRIP,
  74    PR_TRIANGLES,
  75    PR_TRISTRIP_0,
  76    PR_TRIFAN,
  77    0,
  78    0,
  79    PR_POLYGON
  80 };
  81
  82 static const GLenum reduced_prim[GL_POLYGON+1] = {
  83    GL_POINTS,
  84    GL_LINES,
  85    GL_LINES,
  86    GL_LINES,
  87    GL_TRIANGLES,
  88    GL_TRIANGLES,
  89    GL_TRIANGLES,
  90    GL_TRIANGLES,
  91    GL_TRIANGLES,
  92    GL_TRIANGLES
  93 };
  94
  95
  96
  97
  98 #define LOCAL_VARS i810ContextPtr imesa = I810_CONTEXT(ctx)
  99 #define INIT( prim ) do {                                               \
 100    I810_STATECHANGE(imesa, 0);                                          \
 101    i810RasterPrimitive( ctx, reduced_prim[prim], hw_prim[prim] );       \
 102 } while (0)
 103 #define GET_CURRENT_VB_MAX_VERTS() \
 104   (((int)imesa->vertex_high - (int)imesa->vertex_low) / (imesa->vertex_size*4))
 105 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
 106   (I810_DMA_BUF_SZ-4) / (imesa->vertex_size * 4)
 107
 108 #define ALLOC_VERTS( nr ) \
 109   i810AllocDmaLow( imesa, (nr) * imesa->vertex_size * 4)
 110 #define EMIT_VERTS( ctx, j, nr, buf ) \
 111   i810_emit_contiguous_verts(ctx, j, (j)+(nr), buf)
 112
 113 #define FLUSH()  I810_FIREVERTICES( imesa )
 114
 115
 116 #define TAG(x) i810_##x
 117 #include "tnl_dd/t_dd_dmatmp.h"
 118
 119
 120 /**********************************************************************/
 121 /*                          Render pipeline stage                     */
 122 /**********************************************************************/
 123
 124
 125 static GLboolean i810_run_render( GLcontext *ctx,
 126                                   struct tnl_pipeline_stage *stage )
 127 {
 128    i810ContextPtr imesa = I810_CONTEXT(ctx);
 129    TNLcontext *tnl = TNL_CONTEXT(ctx);
 130    struct vertex_buffer *VB = &tnl->vb;
 131    GLuint i;
 132
 133    /* Don't handle clipping or indexed vertices.
 134     */
 135    if (imesa->RenderIndex != 0 ||
 136        !i810_validate_render( ctx, VB )) {
 137       return GL_TRUE;
 138    }
 139
 140    imesa->SetupNewInputs = VERT_BIT_POS;
 141
 142    tnl->Driver.Render.Start( ctx );
 143
 144    for (i = 0 ; i < VB->PrimitiveCount ; i++)
 145    {
 146       GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
 147       GLuint start = VB->Primitive[i].start;
 148       GLuint length = VB->Primitive[i].count;
 149
 150       if (!length)
 151          continue;
 152
 153       i810_render_tab_verts[prim & PRIM_MODE_MASK]( ctx, start, start + length,
 154                                                     prim );
 155    }
 156
 157    tnl->Driver.Render.Finish( ctx );
 158
 159    return GL_FALSE;             /* finished the pipe */
 160 }
 161
 162
 163
 164 const struct tnl_pipeline_stage _i810_render_stage =
 165 {
 166    "i810 render",
 167    NULL,
 168    NULL,
 169    NULL,
 170    NULL,
 171    i810_run_render              /* run */
 172 };