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 "glheader.h"
  32 #include "context.h"
  33 #include "macros.h"
  34 #include "mtypes.h"
  35
  36 #include "tnl/t_context.h"
  37
  38 #include "via_context.h"
  39 #include "via_tris.h"
  40 #include "via_state.h"
  41 #include "via_vb.h"
  42 #include "via_ioctl.h"
  43
  44 /*
  45  * Render unclipped vertex buffers by emitting vertices directly to
  46  * dma buffers.  Use strip/fan hardware primitives where possible.
  47  * Try to simulate missing primitives with indexed vertices.
  48  */
  49 #define HAVE_POINTS      1
  50 #define HAVE_LINES       1
  51 #define HAVE_LINE_STRIPS 1
  52 #define HAVE_LINE_LOOP   1
  53 #define HAVE_TRIANGLES   1
  54 #define HAVE_TRI_STRIPS  1
  55 #define HAVE_TRI_STRIP_1 0      /* has it, template can't use it yet */
  56 #define HAVE_TRI_FANS    1
  57 #define HAVE_POLYGONS    1
  58 #define HAVE_QUADS       0
  59 #define HAVE_QUAD_STRIPS 0
  60
  61 #define HAVE_ELTS        0
  62
  63 #define LOCAL_VARS viaContextPtr vmesa = VIA_CONTEXT(ctx)
  64 #define INIT(prim) do {                                 \
  65    viaRasterPrimitive(ctx, prim, prim); \
  66 } while (0)
  67 #define GET_CURRENT_VB_MAX_VERTS() \
  68     ((VIA_DMA_BUF_SZ - (512 + (int)vmesa->dmaLow)) / (vmesa->vertexSize * 4))
  69 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
  70     (VIA_DMA_BUF_SZ - 512) / (vmesa->vertexSize * 4)
  71
  72 #define ALLOC_VERTS( nr ) \
  73     viaExtendPrimitive( vmesa, (nr) * vmesa->vertexSize * 4)
  74
  75 #define EMIT_VERTS(ctx, j, nr, buf) \
  76     via_emit_contiguous_verts(ctx, j, (j) + (nr), buf)
  77
  78 #define FLUSH() VIA_FINISH_PRIM( vmesa )
  79
  80 #define TAG(x) via_fast##x
  81 #include "tnl_dd/t_dd_dmatmp.h"
  82 #undef TAG
  83 #undef LOCAL_VARS
  84 #undef INIT
  85
  86 /**********************************************************************/
  87 /*                          Fast Render pipeline stage                */
  88 /**********************************************************************/
  89 static GLboolean via_run_fastrender(GLcontext *ctx,
  90                                     struct tnl_pipeline_stage *stage)
  91 {
  92     viaContextPtr vmesa = VIA_CONTEXT(ctx);
  93     TNLcontext *tnl = TNL_CONTEXT(ctx);
  94     struct vertex_buffer *VB = &tnl->vb;
  95     GLuint i;
  96
  97     /* Don't handle clipping or indexed vertices.
  98      */
  99     if (VB->ClipOrMask ||
 100         vmesa->renderIndex != 0 ||
 101         !via_fastvalidate_render( ctx, VB )) {
 102         if (VIA_DEBUG) {
 103             fprintf(stderr, "slow path\n");
 104             fprintf(stderr, "ClipOrMask = %08x\n", VB->ClipOrMask);
 105             fprintf(stderr, "renderIndex = %08x\n", vmesa->renderIndex);
 106             fprintf(stderr, "Elts = %08x\n", (GLuint)VB->Elts);
 107         }
 108         return GL_TRUE;
 109     }
 110     if (VIA_DEBUG) fprintf(stderr, "%s - in\n", __FUNCTION__);
 111     vmesa->setupNewInputs = VERT_BIT_CLIP;
 112
 113     tnl->Driver.Render.Start(ctx);
 114
 115     for (i = 0; i < VB->PrimitiveCount; ++i) {
 116         GLuint mode = VB->Primitive[i].mode;
 117         GLuint start = VB->Primitive[i].start;
 118         GLuint length = VB->Primitive[i].count;
 119         if (length)
 120             via_fastrender_tab_verts[mode & PRIM_MODE_MASK](ctx, start, start+length, mode);
 121     }
 122
 123     tnl->Driver.Render.Finish(ctx);
 124
 125     if (VIA_DEBUG) fprintf(stderr, "%s - out\n", __FUNCTION__);
 126     return GL_FALSE;            /* finished the pipe */
 127 }
 128
 129
 130 static void via_check_fastrender(GLcontext *ctx, struct tnl_pipeline_stage *stage)
 131 {
 132     GLuint inputs = VERT_BIT_CLIP | VERT_BIT_COLOR0;
 133
 134     if (ctx->RenderMode == GL_RENDER) {
 135         if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR)
 136             inputs |= VERT_BIT_COLOR1;
 137
 138         if (ctx->Texture.Unit[0]._ReallyEnabled)
 139             inputs |= VERT_BIT_TEX0;
 140
 141         if (ctx->Texture.Unit[1]._ReallyEnabled)
 142             inputs |= VERT_BIT_TEX1;
 143
 144         if (ctx->Fog.Enabled)
 145             inputs |= VERT_BIT_FOG;
 146     }
 147
 148     stage->inputs = inputs;
 149 }
 150
 151
 152 static void fastdtr(struct tnl_pipeline_stage *stage)
 153 {
 154     (void)stage;
 155 }
 156
 157
 158 const struct tnl_pipeline_stage _via_fastrender_stage =
 159 {
 160     "via fast render",
 161     (_DD_NEW_SEPARATE_SPECULAR |
 162      _NEW_TEXTURE|
 163      _NEW_FOG|
 164      _NEW_RENDERMODE),           /* re-check (new inputs) */
 165     0,                           /* re-run (always runs) */
 166     GL_TRUE,                     /* active */
 167     0, 0,                        /* inputs (set in check_render), outputs */
 168     0, 0,                        /* changed_inputs, private */
 169     fastdtr,                     /* destructor */
 170     via_check_fastrender,        /* check - initially set to alloc data */
 171     via_run_fastrender           /* run */
 172 };
 173
 174