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

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgarender.c,v 1.4 2002/10/30 12:51:36 alanh Exp $ */
   2 /**************************************************************************
   3
   4 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
   5                      VA Linux Systems Inc., Fremont, California.
   6
   7 All Rights Reserved.
   8
   9 Permission is hereby granted, free of charge, to any person obtaining a
  10 copy of this software and associated documentation files (the "Software"),
  11 to deal in the Software without restriction, including without limitation
  12 on the rights to use, copy, modify, merge, publish, distribute, sub
  13 license, and/or sell copies of the Software, and to permit persons to whom
  14 the Software is furnished to do so, subject to the following conditions:
  15
  16 The above copyright notice and this permission notice (including the next
  17 paragraph) shall be included in all copies or substantial portions of the
  18 Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  23 ATI, VA LINUX SYSTEMS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  24 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  25 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  26 USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 **************************************************************************/
  29
  30 /*
  31  * Authors:
  32  *   Keith Whitwell <keith@tungstengraphics.com>
  33  *
  34  */
  35
  36
  37 /*
  38  * Render unclipped vertex buffers by emitting vertices directly to
  39  * dma buffers.  Use strip/fan hardware primitives where possible.
  40  * Simulate missing primitives with indexed vertices.
  41  */
  42 #include "glheader.h"
  43 #include "context.h"
  44 #include "macros.h"
  45 #include "imports.h"
  46 #include "mtypes.h"
  47
  48 #include "tnl/t_context.h"
  49
  50 #include "mgacontext.h"
  51 #include "mgatris.h"
  52 #include "mgastate.h"
  53 #include "mgaioctl.h"
  54 #include "mgavb.h"
  55
  56 #define HAVE_POINTS      0
  57 #define HAVE_LINES       0
  58 #define HAVE_LINE_STRIPS 0
  59 #define HAVE_TRIANGLES   1
  60 #define HAVE_TRI_STRIPS  1
  61 #define HAVE_TRI_STRIP_1 0
  62 #define HAVE_TRI_FANS    1
  63 #define HAVE_POLYGONS    0
  64 #define HAVE_QUADS       0
  65 #define HAVE_QUAD_STRIPS 0
  66
  67 #define HAVE_ELTS        0      /* for now */
  68
  69 static void mgaDmaPrimitive( GLcontext *ctx, GLenum prim )
  70 {
  71    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
  72    GLuint hwprim;
  73
  74    switch (prim) {
  75    case GL_TRIANGLES:
  76       hwprim = MGA_WA_TRIANGLES;
  77       break;
  78    case GL_TRIANGLE_STRIP:
  79       if (mmesa->vertex_size == 8)
  80          hwprim = MGA_WA_TRISTRIP_T0;
  81       else
  82          hwprim = MGA_WA_TRISTRIP_T0T1;
  83       break;
  84    case GL_TRIANGLE_FAN:
  85       if (mmesa->vertex_size == 8)
  86          hwprim = MGA_WA_TRIFAN_T0;
  87       else
  88          hwprim = MGA_WA_TRIFAN_T0T1;
  89       break;
  90    default:
  91       return;
  92    }
  93
  94    mgaRasterPrimitive( ctx, GL_TRIANGLES, hwprim );
  95 }
  96
  97
  98 #define LOCAL_VARS mgaContextPtr mmesa = MGA_CONTEXT(ctx)
  99 #define INIT( prim ) do {                       \
 100    if (0) fprintf(stderr, "%s\n", __FUNCTION__);        \
 101    FLUSH_BATCH(mmesa);                          \
 102    mgaDmaPrimitive( ctx, prim );                \
 103 } while (0)
 104 #define FLUSH()  FLUSH_BATCH( mmesa )
 105 #define GET_CURRENT_VB_MAX_VERTS() \
 106    0 /* fix me */
 107 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
 108    MGA_BUFFER_SIZE / (mmesa->vertex_size * 4)
 109
 110
 111 #define ALLOC_VERTS( nr ) \
 112    mgaAllocDmaLow( mmesa, nr * mmesa->vertex_size * 4)
 113 #define EMIT_VERTS( ctx, j, nr, buf ) \
 114    mga_emit_contiguous_verts(ctx, j, (j)+(nr), buf)
 115
 116
 117 #define TAG(x) mga_##x
 118 #include "tnl_dd/t_dd_dmatmp.h"
 119
 120
 121
 122 /**********************************************************************/
 123 /*                          Render pipeline stage                     */
 124 /**********************************************************************/
 125
 126
 127 static GLboolean mga_run_render( GLcontext *ctx,
 128                                   struct tnl_pipeline_stage *stage )
 129 {
 130    mgaContextPtr mmesa = MGA_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 or vertex manipulations.
 136     */
 137    if (mmesa->RenderIndex != 0 ||
 138        !mga_validate_render( ctx, VB )) {
 139       return GL_TRUE;
 140    }
 141
 142    tnl->Driver.Render.Start( ctx );
 143    mmesa->SetupNewInputs = ~0;
 144
 145    for (i = 0 ; i < VB->PrimitiveCount ; i++)
 146    {
 147       GLuint prim = VB->Primitive[i].mode;
 148       GLuint start = VB->Primitive[i].start;
 149       GLuint length = VB->Primitive[i].count;
 150
 151       if (!length)
 152          continue;
 153
 154       mga_render_tab_verts[prim & PRIM_MODE_MASK]( ctx, start, start + length,
 155                                                    prim);
 156    }
 157
 158    tnl->Driver.Render.Finish( ctx );
 159
 160    return GL_FALSE;             /* finished the pipe */
 161 }
 162
 163
 164 static void mga_check_render( GLcontext *ctx, struct tnl_pipeline_stage *stage )
 165 {
 166    stage->inputs = TNL_CONTEXT(ctx)->render_inputs;
 167 }
 168
 169
 170 static void dtr( struct tnl_pipeline_stage *stage )
 171 {
 172    (void)stage;
 173 }
 174
 175
 176 const struct tnl_pipeline_stage _mga_render_stage =
 177 {
 178    "mga render",
 179    (_DD_NEW_SEPARATE_SPECULAR |
 180     _NEW_TEXTURE|
 181     _NEW_FOG|
 182     _NEW_RENDERMODE),           /* re-check (new inputs) */
 183    0,                           /* re-run (always runs) */
 184    GL_TRUE,                     /* active */
 185    0, 0,                        /* inputs (set in check_render), outputs */
 186    0, 0,                        /* changed_inputs, private */
 187    dtr,                         /* destructor */
 188    mga_check_render,            /* check - initially set to alloc data */
 189    mga_run_render               /* run */
 190 };