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 "math/m_xform.h"
  41
  42 #include "tnl/t_context.h"
  43
  44 #include "i810screen.h"
  45 #include "i810_dri.h"
  46
  47 #include "i810context.h"
  48 #include "i810tris.h"
  49 #include "i810vb.h"
  50 #include "i810ioctl.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
  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_STRIP_1 0      /* has it, template can't use it yet */
  63 #define HAVE_TRI_FANS    1
  64 #define HAVE_POLYGONS    1
  65 #define HAVE_QUADS       0
  66 #define HAVE_QUAD_STRIPS 0
  67
  68 #define HAVE_ELTS        0
  69
  70
  71 static GLuint hw_prim[GL_POLYGON+1] = {
  72    0,
  73    PR_LINES,
  74    0,
  75    PR_LINESTRIP,
  76    PR_TRIANGLES,
  77    PR_TRISTRIP_0,
  78    PR_TRIFAN,
  79    0,
  80    0,
  81    PR_POLYGON
  82 };
  83
  84 static const GLenum reduced_prim[GL_POLYGON+1] = {
  85    GL_POINTS,
  86    GL_LINES,
  87    GL_LINES,
  88    GL_LINES,
  89    GL_TRIANGLES,
  90    GL_TRIANGLES,
  91    GL_TRIANGLES,
  92    GL_TRIANGLES,
  93    GL_TRIANGLES,
  94    GL_TRIANGLES
  95 };
  96
  97
  98
  99
 100 #define LOCAL_VARS i810ContextPtr imesa = I810_CONTEXT(ctx)
 101 #define INIT( prim ) do {                                               \
 102    I810_STATECHANGE(imesa, 0);                                          \
 103    i810RasterPrimitive( ctx, reduced_prim[prim], hw_prim[prim] );       \
 104 } while (0)
 105 #define GET_CURRENT_VB_MAX_VERTS() \
 106   (((int)imesa->vertex_high - (int)imesa->vertex_low) / (imesa->vertex_size*4))
 107 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
 108   (I810_DMA_BUF_SZ-4) / (imesa->vertex_size * 4)
 109
 110 #define ALLOC_VERTS( nr ) \
 111   i810AllocDmaLow( imesa, (nr) * imesa->vertex_size * 4)
 112 #define EMIT_VERTS( ctx, j, nr, buf ) \
 113   i810_emit_contiguous_verts(ctx, j, (j)+(nr), buf)
 114
 115 #define FLUSH()  I810_FIREVERTICES( imesa )
 116
 117
 118 #define TAG(x) i810_##x
 119 #include "tnl_dd/t_dd_dmatmp.h"
 120
 121
 122 /**********************************************************************/
 123 /*                          Render pipeline stage                     */
 124 /**********************************************************************/
 125
 126
 127 static GLboolean i810_run_render( struct gl_context *ctx,
 128                                   struct tnl_pipeline_stage *stage )
 129 {
 130    i810ContextPtr imesa = I810_CONTEXT(ctx);
 131    TNLcontext *tnl = TNL_CONTEXT(ctx);
 132    struct vertex_buffer *VB = &tnl->vb;
 133    GLuint i;
 134
 135    /* Don't handle clipping or indexed vertices.
 136     */
 137    if (imesa->RenderIndex != 0 ||
 138        !i810_validate_render( ctx, VB )) {
 139       return GL_TRUE;
 140    }
 141
 142    imesa->SetupNewInputs = VERT_BIT_POS;
 143
 144    tnl->Driver.Render.Start( ctx );
 145
 146    for (i = 0 ; i < VB->PrimitiveCount ; i++)
 147    {
 148       GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
 149       GLuint start = VB->Primitive[i].start;
 150       GLuint length = VB->Primitive[i].count;
 151
 152       if (!length)
 153          continue;
 154
 155       i810_render_tab_verts[prim & PRIM_MODE_MASK]( ctx, start, start + length,
 156                                                     prim );
 157    }
 158
 159    tnl->Driver.Render.Finish( ctx );
 160
 161    return GL_FALSE;             /* finished the pipe */
 162 }
 163
 164
 165
 166 const struct tnl_pipeline_stage _i810_render_stage =
 167 {
 168    "i810 render",
 169    NULL,
 170    NULL,
 171    NULL,
 172    NULL,
 173    i810_run_render              /* run */
 174 };