src/mesa/drivers/dri/unichrome/via_render.c

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /*
  27  * Render unclipped vertex buffers by emitting vertices directly to
  28  * dma buffers.  Use strip/fan hardware acceleration where possible.
  29  *
  30  */
  31 #include "main/glheader.h"
  32 #include "main/context.h"
  33 #include "main/macros.h"
  34 #include "main/mtypes.h"
  35
  36 #include "tnl/t_context.h"
  37
  38 #include "via_context.h"
  39 #include "via_tris.h"
  40 #include "via_ioctl.h"
  41
  42 /*
  43  * Render unclipped vertex buffers by emitting vertices directly to
  44  * dma buffers.  Use strip/fan hardware primitives where possible.
  45  * Try to simulate missing primitives with indexed vertices.
  46  */
  47 #define HAVE_POINTS      1
  48 #define HAVE_LINES       1
  49 #define HAVE_LINE_STRIPS 1
  50 #define HAVE_LINE_LOOP   1
  51 #define HAVE_TRIANGLES   1
  52 #define HAVE_TRI_STRIPS  1
  53 #define HAVE_TRI_STRIP_1 0
  54 #define HAVE_TRI_FANS    1
  55 #define HAVE_POLYGONS    1
  56 #define HAVE_QUADS       0
  57 #define HAVE_QUAD_STRIPS 0
  58
  59 #define HAVE_ELTS        0
  60
  61 #define LOCAL_VARS struct via_context *vmesa = VIA_CONTEXT(ctx)
  62 #define INIT(prim) do {                                 \
  63    viaRasterPrimitive(ctx, prim, prim); \
  64 } while (0)
  65 #define GET_CURRENT_VB_MAX_VERTS() \
  66     ((VIA_DMA_BUF_SZ - (512 + (int)vmesa->dmaLow)) / (vmesa->vertexSize * 4))
  67 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
  68     (VIA_DMA_BUF_SZ - 512) / (vmesa->vertexSize * 4)
  69
  70 #define ALLOC_VERTS( nr ) \
  71     viaExtendPrimitive( vmesa, (nr) * vmesa->vertexSize * 4)
  72
  73 #define EMIT_VERTS(ctx, j, nr, buf) \
  74     _tnl_emit_vertices_to_buffer(ctx, j, (j)+(nr), buf )
  75
  76 #define FLUSH() VIA_FINISH_PRIM( vmesa )
  77
  78 #define TAG(x) via_fast##x
  79 #include "tnl_dd/t_dd_dmatmp.h"
  80 #undef TAG
  81 #undef LOCAL_VARS
  82 #undef INIT
  83
  84 /**********************************************************************/
  85 /*                          Fast Render pipeline stage                */
  86 /**********************************************************************/
  87 static GLboolean via_run_fastrender(GLcontext *ctx,
  88                                     struct tnl_pipeline_stage *stage)
  89 {
  90     struct via_context *vmesa = VIA_CONTEXT(ctx);
  91     TNLcontext *tnl = TNL_CONTEXT(ctx);
  92     struct vertex_buffer *VB = &tnl->vb;
  93     GLuint i;
  94
  95
  96     tnl->Driver.Render.Start(ctx);
  97
  98     if (VB->ClipOrMask ||
  99         vmesa->renderIndex != 0 ||
 100         !via_fastvalidate_render( ctx, VB )) {
 101         tnl->Driver.Render.Finish(ctx);
 102         return GL_TRUE;
 103     }
 104
 105     tnl->clipspace.new_inputs |= VERT_BIT_POS;
 106
 107     for (i = 0; i < VB->PrimitiveCount; ++i) {
 108         GLuint mode = _tnl_translate_prim(&VB->Primitive[i]);
 109         GLuint start = VB->Primitive[i].start;
 110         GLuint length = VB->Primitive[i].count;
 111         if (length)
 112             via_fastrender_tab_verts[mode & PRIM_MODE_MASK](ctx, start, start+length, mode);
 113     }
 114
 115     tnl->Driver.Render.Finish(ctx);
 116
 117     return GL_FALSE;            /* finished the pipe */
 118 }
 119
 120 const struct tnl_pipeline_stage _via_fastrender_stage =
 121 {
 122     "via fast render",
 123     NULL,
 124     NULL,
 125     NULL,
 126     NULL,
 127     via_run_fastrender           /* run */
 128 };
 129
 130