i830_vtbl.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/**************************************************************************
 * 
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

#include "glapi.h"

#include "i830_context.h"
#include "i830_reg.h"
#include "intel_batchbuffer.h"
#include "intel_regions.h"
#include "tnl/t_context.h"
#include "tnl/t_vertex.h"

#define FILE_DEBUG_FLAG DEBUG_STATE

static GLboolean i830_check_vertex_size(struct intel_context *intel,
                                        GLuint expected);

#define SZ_TO_HW(sz)  ((sz-2)&0x3)
#define EMIT_SZ(sz)   (EMIT_1F + (sz) - 1)
#define EMIT_ATTR( ATTR, STYLE, V0 )					\
do {									\
   intel->vertex_attrs[intel->vertex_attr_count].attrib = (ATTR);	\
   intel->vertex_attrs[intel->vertex_attr_count].format = (STYLE);	\
   intel->vertex_attr_count++;						\
   v0 |= V0;								\
} while (0)

#define EMIT_PAD( N )							\
do {									\
   intel->vertex_attrs[intel->vertex_attr_count].attrib = 0;		\
   intel->vertex_attrs[intel->vertex_attr_count].format = EMIT_PAD;	\
   intel->vertex_attrs[intel->vertex_attr_count].offset = (N);		\
   intel->vertex_attr_count++;						\
} while (0)


#define VRTX_TEX_SET_FMT(n, x)          ((x)<<((n)*2))
#define TEXBIND_SET(n, x) 		((x)<<((n)*4))

static void
i830_render_prevalidate(struct intel_context *intel)
{
}

static void
i830_render_start(struct intel_context *intel)
{
   GLcontext *ctx = &intel->ctx;
   struct i830_context *i830 = i830_context(ctx);
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   struct vertex_buffer *VB = &tnl->vb;
   DECLARE_RENDERINPUTS(index_bitset);
   GLuint v0 = _3DSTATE_VFT0_CMD;
   GLuint v2 = _3DSTATE_VFT1_CMD;
   GLuint mcsb1 = 0;

   RENDERINPUTS_COPY(index_bitset, tnl->render_inputs_bitset);

   /* Important:
    */
   VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
   intel->vertex_attr_count = 0;

   /* EMIT_ATTR's must be in order as they tell t_vertex.c how to
    * build up a hardware vertex.
    */
   if (RENDERINPUTS_TEST_RANGE(index_bitset, _TNL_FIRST_TEX, _TNL_LAST_TEX)) {
      EMIT_ATTR(_TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, VFT0_XYZW);
      intel->coloroffset = 4;
   }
   else {
      EMIT_ATTR(_TNL_ATTRIB_POS, EMIT_3F_VIEWPORT, VFT0_XYZ);
      intel->coloroffset = 3;
   }

   if (RENDERINPUTS_TEST(index_bitset, _TNL_ATTRIB_POINTSIZE)) {
      EMIT_ATTR(_TNL_ATTRIB_POINTSIZE, EMIT_1F, VFT0_POINT_WIDTH);
   }

   EMIT_ATTR(_TNL_ATTRIB_COLOR0, EMIT_4UB_4F_BGRA, VFT0_DIFFUSE);

   intel->specoffset = 0;
   if (RENDERINPUTS_TEST(index_bitset, _TNL_ATTRIB_COLOR1) ||
       RENDERINPUTS_TEST(index_bitset, _TNL_ATTRIB_FOG)) {
      if (RENDERINPUTS_TEST(index_bitset, _TNL_ATTRIB_COLOR1)) {
         intel->specoffset = intel->coloroffset + 1;
         EMIT_ATTR(_TNL_ATTRIB_COLOR1, EMIT_3UB_3F_BGR, VFT0_SPEC);
      }
      else
         EMIT_PAD(3);

      if (RENDERINPUTS_TEST(index_bitset, _TNL_ATTRIB_FOG))
         EMIT_ATTR(_TNL_ATTRIB_FOG, EMIT_1UB_1F, VFT0_SPEC);
      else
         EMIT_PAD(1);
   }

   if (RENDERINPUTS_TEST_RANGE(index_bitset, _TNL_FIRST_TEX, _TNL_LAST_TEX)) {
      int i, count = 0;

      for (i = 0; i < I830_TEX_UNITS; i++) {
         if (RENDERINPUTS_TEST(index_bitset, _TNL_ATTRIB_TEX(i))) {
            GLuint sz = VB->TexCoordPtr[i]->size;
            GLuint emit;
            GLuint mcs = (i830->state.Tex[i][I830_TEXREG_MCS] &
                          ~TEXCOORDTYPE_MASK);

            switch (sz) {
            case 1:
            case 2:
               emit = EMIT_2F;
               sz = 2;
               mcs |= TEXCOORDTYPE_CARTESIAN;
               break;
            case 3:
               emit = EMIT_3F;
               sz = 3;
               mcs |= TEXCOORDTYPE_VECTOR;
               break;
            case 4:
               emit = EMIT_3F_XYW;
               sz = 3;
               mcs |= TEXCOORDTYPE_HOMOGENEOUS;
               break;
            default:
               continue;
            };


            EMIT_ATTR(_TNL_ATTRIB_TEX0 + i, emit, 0);
            v2 |= VRTX_TEX_SET_FMT(count, SZ_TO_HW(sz));
            mcsb1 |= (count + 8) << (i * 4);

            if (mcs != i830->state.Tex[i][I830_TEXREG_MCS]) {
               I830_STATECHANGE(i830, I830_UPLOAD_TEX(i));
               i830->state.Tex[i][I830_TEXREG_MCS] = mcs;
            }

            count++;
         }
      }

      v0 |= VFT0_TEX_COUNT(count);
   }

   /* Only need to change the vertex emit code if there has been a
    * statechange to a new hardware vertex format:
    */
   if (v0 != i830->state.Ctx[I830_CTXREG_VF] ||
       v2 != i830->state.Ctx[I830_CTXREG_VF2] ||
       mcsb1 != i830->state.Ctx[I830_CTXREG_MCSB1] ||
       !RENDERINPUTS_EQUAL(index_bitset, i830->last_index_bitset)) {
      int k;

      I830_STATECHANGE(i830, I830_UPLOAD_CTX);

      /* Must do this *after* statechange, so as not to affect
       * buffered vertices reliant on the old state:
       */
      intel->vertex_size =
         _tnl_install_attrs(ctx,
                            intel->vertex_attrs,
                            intel->vertex_attr_count,
                            intel->ViewportMatrix.m, 0);

      intel->vertex_size >>= 2;

      i830->state.Ctx[I830_CTXREG_VF] = v0;
      i830->state.Ctx[I830_CTXREG_VF2] = v2;
      i830->state.Ctx[I830_CTXREG_MCSB1] = mcsb1;
      RENDERINPUTS_COPY(i830->last_index_bitset, index_bitset);

      k = i830_check_vertex_size(intel, intel->vertex_size);
      assert(k);
   }
}

static void
i830_reduced_primitive_state(struct intel_context *intel, GLenum rprim)
{
   struct i830_context *i830 = i830_context(&intel->ctx);
   GLuint st1 = i830->state.Stipple[I830_STPREG_ST1];

   st1 &= ~ST1_ENABLE;

   switch (rprim) {
   case GL_TRIANGLES:
      if (intel->ctx.Polygon.StippleFlag && intel->hw_stipple)
         st1 |= ST1_ENABLE;
      break;
   case GL_LINES:
   case GL_POINTS:
   default:
      break;
   }

   i830->intel.reduced_primitive = rprim;

   if (st1 != i830->state.Stipple[I830_STPREG_ST1]) {
      INTEL_FIREVERTICES(intel);

      I830_STATECHANGE(i830, I830_UPLOAD_STIPPLE);
      i830->state.Stipple[I830_STPREG_ST1] = st1;
   }
}

/* Pull apart the vertex format registers and figure out how large a
 * vertex is supposed to be. 
 */
static GLboolean
i830_check_vertex_size(struct intel_context *intel, GLuint expected)
{
   struct i830_context *i830 = i830_context(&intel->ctx);
   int vft0 = i830->current->Ctx[I830_CTXREG_VF];
   int vft1 = i830->current->Ctx[I830_CTXREG_VF2];
   int nrtex = (vft0 & VFT0_TEX_COUNT_MASK) >> VFT0_TEX_COUNT_SHIFT;
   int i, sz = 0;

   switch (vft0 & VFT0_XYZW_MASK) {
   case VFT0_XY:
      sz = 2;
      break;
   case VFT0_XYZ:
      sz = 3;
      break;
   case VFT0_XYW:
      sz = 3;
      break;
   case VFT0_XYZW:
      sz = 4;
      break;
   default:
      fprintf(stderr, "no xyzw specified\n");
      return 0;
   }

   if (vft0 & VFT0_SPEC)
      sz++;
   if (vft0 & VFT0_DIFFUSE)
      sz++;
   if (vft0 & VFT0_DEPTH_OFFSET)
      sz++;
   if (vft0 & VFT0_POINT_WIDTH)
      sz++;

   for (i = 0; i < nrtex; i++) {
      switch (vft1 & VFT1_TEX0_MASK) {
      case TEXCOORDFMT_2D:
         sz += 2;
         break;
      case TEXCOORDFMT_3D:
         sz += 3;
         break;
      case TEXCOORDFMT_4D:
         sz += 4;
         break;
      case TEXCOORDFMT_1D:
         sz += 1;
         break;
      }
      vft1 >>= VFT1_TEX1_SHIFT;
   }

   if (sz != expected)
      fprintf(stderr, "vertex size mismatch %d/%d\n", sz, expected);

   return sz == expected;
}

static void
i830_emit_invarient_state(struct intel_context *intel)
{
   BATCH_LOCALS;

   BEGIN_BATCH(40, IGNORE_CLIPRECTS);

   OUT_BATCH(_3DSTATE_DFLT_DIFFUSE_CMD);
   OUT_BATCH(0);

   OUT_BATCH(_3DSTATE_DFLT_SPEC_CMD);
   OUT_BATCH(0);

   OUT_BATCH(_3DSTATE_DFLT_Z_CMD);
   OUT_BATCH(0);

   OUT_BATCH(_3DSTATE_FOG_MODE_CMD);
   OUT_BATCH(FOGFUNC_ENABLE |
             FOG_LINEAR_CONST | FOGSRC_INDEX_Z | ENABLE_FOG_DENSITY);
   OUT_BATCH(0);
   OUT_BATCH(0);


   OUT_BATCH(_3DSTATE_MAP_TEX_STREAM_CMD |
             MAP_UNIT(0) |
             DISABLE_TEX_STREAM_BUMP |
             ENABLE_TEX_STREAM_COORD_SET |
             TEX_STREAM_COORD_SET(0) |
             ENABLE_TEX_STREAM_MAP_IDX | TEX_STREAM_MAP_IDX(0));
   OUT_BATCH(_3DSTATE_MAP_TEX_STREAM_CMD |
             MAP_UNIT(1) |
             DISABLE_TEX_STREAM_BUMP |
             ENABLE_TEX_STREAM_COORD_SET |
             TEX_STREAM_COORD_SET(1) |
             ENABLE_TEX_STREAM_MAP_IDX | TEX_STREAM_MAP_IDX(1));
   OUT_BATCH(_3DSTATE_MAP_TEX_STREAM_CMD |
             MAP_UNIT(2) |
             DISABLE_TEX_STREAM_BUMP |
             ENABLE_TEX_STREAM_COORD_SET |
             TEX_STREAM_COORD_SET(2) |
             ENABLE_TEX_STREAM_MAP_IDX | TEX_STREAM_MAP_IDX(2));
   OUT_BATCH(_3DSTATE_MAP_TEX_STREAM_CMD |
             MAP_UNIT(3) |
             DISABLE_TEX_STREAM_BUMP |
             ENABLE_TEX_STREAM_COORD_SET |
             TEX_STREAM_COORD_SET(3) |
             ENABLE_TEX_STREAM_MAP_IDX | TEX_STREAM_MAP_IDX(3));

   OUT_BATCH(_3DSTATE_MAP_COORD_TRANSFORM);
   OUT_BATCH(DISABLE_TEX_TRANSFORM | TEXTURE_SET(0));
   OUT_BATCH(_3DSTATE_MAP_COORD_TRANSFORM);
   OUT_BATCH(DISABLE_TEX_TRANSFORM | TEXTURE_SET(1));
   OUT_BATCH(_3DSTATE_MAP_COORD_TRANSFORM);
   OUT_BATCH(DISABLE_TEX_TRANSFORM | TEXTURE_SET(2));
   OUT_BATCH(_3DSTATE_MAP_COORD_TRANSFORM);
   OUT_BATCH(DISABLE_TEX_TRANSFORM | TEXTURE_SET(3));

   OUT_BATCH(_3DSTATE_RASTER_RULES_CMD |
             ENABLE_POINT_RASTER_RULE |
             OGL_POINT_RASTER_RULE |
             ENABLE_LINE_STRIP_PROVOKE_VRTX |
             ENABLE_TRI_FAN_PROVOKE_VRTX |
             ENABLE_TRI_STRIP_PROVOKE_VRTX |
             LINE_STRIP_PROVOKE_VRTX(1) |
             TRI_FAN_PROVOKE_VRTX(2) | TRI_STRIP_PROVOKE_VRTX(2));

   OUT_BATCH(_3DSTATE_VERTEX_TRANSFORM);
   OUT_BATCH(DISABLE_VIEWPORT_TRANSFORM | DISABLE_PERSPECTIVE_DIVIDE);