src/mesa/drivers/dri/mga/mgarender.c

   1 /**************************************************************************
   2
   3 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
   4                      VA Linux Systems Inc., Fremont, California.
   5
   6 All Rights Reserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining a
   9 copy of this software and associated documentation files (the "Software"),
  10 to deal in the Software without restriction, including without limitation
  11 on the rights to use, copy, modify, merge, publish, distribute, sub
  12 license, and/or sell copies of the Software, and to permit persons to whom
  13 the Software is furnished to do so, subject to the following conditions:
  14
  15 The above copyright notice and this permission notice (including the next
  16 paragraph) shall be included in all copies or substantial portions of the
  17 Software.
  18
  19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  22 ATI, VA LINUX SYSTEMS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  23 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  24 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  25 USE OR OTHER DEALINGS IN THE SOFTWARE.
  26
  27 **************************************************************************/
  28
  29 /*
  30  * Authors:
  31  *   Keith Whitwell <keith@tungstengraphics.com>
  32  *
  33  */
  34
  35
  36 /*
  37  * Render unclipped vertex buffers by emitting vertices directly to
  38  * dma buffers.  Use strip/fan hardware primitives where possible.
  39  * Simulate missing primitives with indexed vertices.
  40  */
  41 #include "main/glheader.h"
  42 #include "main/context.h"
  43 #include "main/macros.h"
  44 #include "main/imports.h"
  45 #include "main/mtypes.h"
  46
  47 #include "tnl/t_context.h"
  48
  49 #include "mgacontext.h"
  50 #include "mgatris.h"
  51 #include "mgaioctl.h"
  52 #include "mgavb.h"
  53
  54 #define HAVE_POINTS      0
  55 #define HAVE_LINES       0
  56 #define HAVE_LINE_STRIPS 0
  57 #define HAVE_TRIANGLES   1
  58 #define HAVE_TRI_STRIPS  1
  59 #define HAVE_TRI_STRIP_1 0
  60 #define HAVE_TRI_FANS    1
  61 #define HAVE_POLYGONS    0
  62 #define HAVE_QUADS       0
  63 #define HAVE_QUAD_STRIPS 0
  64
  65 #define HAVE_ELTS        0      /* for now */
  66
  67 static void mgaDmaPrimitive( GLcontext *ctx, GLenum prim )
  68 {
  69    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
  70    GLuint hwprim;
  71
  72    switch (prim) {
  73    case GL_TRIANGLES:
  74       hwprim = MGA_WA_TRIANGLES;
  75       break;
  76    case GL_TRIANGLE_STRIP:
  77       if (mmesa->vertex_size == 8)
  78          hwprim = MGA_WA_TRISTRIP_T0;
  79       else
  80          hwprim = MGA_WA_TRISTRIP_T0T1;
  81       break;
  82    case GL_TRIANGLE_FAN:
  83       if (mmesa->vertex_size == 8)
  84          hwprim = MGA_WA_TRIFAN_T0;
  85       else
  86          hwprim = MGA_WA_TRIFAN_T0T1;
  87       break;
  88    default:
  89       return;
  90    }
  91
  92    mgaRasterPrimitive( ctx, GL_TRIANGLES, hwprim );
  93 }
  94
  95
  96 #define LOCAL_VARS mgaContextPtr mmesa = MGA_CONTEXT(ctx)
  97 #define INIT( prim ) do {                       \
  98    if (0) fprintf(stderr, "%s\n", __FUNCTION__);        \
  99    FLUSH_BATCH(mmesa);                          \
 100    mgaDmaPrimitive( ctx, prim );                \
 101 } while (0)
 102 #define FLUSH()  FLUSH_BATCH( mmesa )
 103 #define GET_CURRENT_VB_MAX_VERTS() \
 104    0 /* fix me */
 105 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
 106    MGA_BUFFER_SIZE / (mmesa->vertex_size * 4)
 107
 108
 109 #define ALLOC_VERTS( nr ) \
 110   mgaAllocDmaLow( mmesa, (nr) * mmesa->vertex_size * 4)
 111 #define EMIT_VERTS( ctx, j, nr, buf ) \
 112    mga_emit_contiguous_verts(ctx, j, (j)+(nr), buf)
 113
 114
 115 #define TAG(x) mga_##x
 116 #include "tnl_dd/t_dd_dmatmp.h"
 117
 118
 119
 120 /**********************************************************************/
 121 /*                          Render pipeline stage                     */
 122 /**********************************************************************/
 123
 124
 125 static GLboolean mga_run_render( GLcontext *ctx,
 126                                   struct tnl_pipeline_stage *stage )
 127 {
 128    mgaContextPtr mmesa = MGA_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 or vertex manipulations.
 134     */
 135    if (mmesa->RenderIndex != 0 ||
 136        !mga_validate_render( ctx, VB )) {
 137       return GL_TRUE;
 138    }
 139
 140    tnl->Driver.Render.Start( ctx );
 141    mmesa->SetupNewInputs = ~0;
 142
 143    for (i = 0 ; i < VB->PrimitiveCount ; i++)
 144    {
 145       GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
 146       GLuint start = VB->Primitive[i].start;
 147       GLuint length = VB->Primitive[i].count;
 148
 149       if (!length)
 150          continue;
 151
 152       mga_render_tab_verts[prim & PRIM_MODE_MASK]( ctx, start, start + length,
 153                                                    prim);
 154    }
 155
 156    tnl->Driver.Render.Finish( ctx );
 157
 158    return GL_FALSE;             /* finished the pipe */
 159 }
 160
 161
 162 const struct tnl_pipeline_stage _mga_render_stage =
 163 {
 164    "mga render",
 165    NULL,
 166    NULL,
 167    NULL,
 168    NULL,
 169    mga_run_render               /* run */
 170 };