src/gallium/drivers/svga/svga_swtnl_state.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "draw/draw_context.h"
  27 #include "draw/draw_vbuf.h"
  28 #include "pipe/p_inlines.h"
  29 #include "pipe/p_state.h"
  30 #include "util/u_memory.h"
  31
  32 #include "svga_context.h"
  33 #include "svga_swtnl.h"
  34 #include "svga_state.h"
  35
  36 #include "svga_swtnl_private.h"
  37
  38
  39 #define SVGA_POINT_ADJ_X -0.375
  40 #define SVGA_POINT_ADJ_Y -0.5
  41
  42 #define SVGA_LINE_ADJ_X -0.5
  43 #define SVGA_LINE_ADJ_Y -0.5
  44
  45 #define SVGA_TRIANGLE_ADJ_X -0.375
  46 #define SVGA_TRIANGLE_ADJ_Y -0.5
  47
  48
  49 static void set_draw_viewport( struct svga_context *svga )
  50 {
  51    struct pipe_viewport_state vp = svga->curr.viewport;
  52    float adjx = 0;
  53    float adjy = 0;
  54
  55    switch (svga->curr.reduced_prim) {
  56    case PIPE_PRIM_POINTS:
  57       adjx = SVGA_POINT_ADJ_X;
  58       adjy = SVGA_POINT_ADJ_Y;
  59       break;
  60    case PIPE_PRIM_LINES:
  61       /* XXX: This is to compensate for the fact that wide lines are
  62        * going to be drawn with triangles, but we're not catching all
  63        * cases where that will happen.
  64        */
  65       if (svga->curr.rast->templ.line_width > 1.0)
  66       {
  67          adjx = SVGA_LINE_ADJ_X + 0.175;
  68          adjy = SVGA_LINE_ADJ_Y - 0.175;
  69       }
  70       else {
  71          adjx = SVGA_LINE_ADJ_X;
  72          adjy = SVGA_LINE_ADJ_Y;
  73       }
  74       break;
  75    case PIPE_PRIM_TRIANGLES:
  76       adjx += SVGA_TRIANGLE_ADJ_X;
  77       adjy += SVGA_TRIANGLE_ADJ_Y;
  78       break;
  79    }
  80
  81    vp.translate[0] += adjx;
  82    vp.translate[1] += adjy;
  83
  84    draw_set_viewport_state(svga->swtnl.draw, &vp);
  85 }
  86
  87 static int update_swtnl_draw( struct svga_context *svga,
  88                               unsigned dirty )
  89 {
  90    draw_flush( svga->swtnl.draw );
  91
  92    if (dirty & SVGA_NEW_VS)
  93       draw_bind_vertex_shader(svga->swtnl.draw,
  94                               svga->curr.vs->draw_shader);
  95
  96    if (dirty & SVGA_NEW_VBUFFER)
  97       draw_set_vertex_buffers(svga->swtnl.draw,
  98                               svga->curr.num_vertex_buffers,
  99                               svga->curr.vb);
 100
 101    if (dirty & SVGA_NEW_VELEMENT)
 102       draw_set_vertex_elements(svga->swtnl.draw,
 103                                svga->curr.num_vertex_elements,
 104                                svga->curr.ve );
 105
 106    if (dirty & SVGA_NEW_CLIP)
 107       draw_set_clip_state(svga->swtnl.draw,
 108                           &svga->curr.clip);
 109
 110    if (dirty & (SVGA_NEW_VIEWPORT |
 111                 SVGA_NEW_REDUCED_PRIMITIVE |
 112                 SVGA_NEW_RAST))
 113       set_draw_viewport( svga );
 114
 115    if (dirty & SVGA_NEW_RAST)
 116       draw_set_rasterizer_state(svga->swtnl.draw,
 117                                 &svga->curr.rast->templ);
 118
 119    if (dirty & SVGA_NEW_FRAME_BUFFER)
 120       draw_set_mrd(svga->swtnl.draw,
 121                    svga->curr.depthscale);
 122
 123    if (dirty & SVGA_NEW_EDGEFLAGS)
 124       draw_set_edgeflags( svga->swtnl.draw,
 125                           svga->curr.edgeflags );
 126
 127    return 0;
 128 }
 129
 130
 131 struct svga_tracked_state svga_update_swtnl_draw =
 132 {
 133    "update draw module state",
 134    (SVGA_NEW_VS |
 135     SVGA_NEW_VBUFFER |
 136     SVGA_NEW_VELEMENT |
 137     SVGA_NEW_CLIP |
 138     SVGA_NEW_VIEWPORT |
 139     SVGA_NEW_RAST |
 140     SVGA_NEW_FRAME_BUFFER |
 141     SVGA_NEW_REDUCED_PRIMITIVE |
 142     SVGA_NEW_EDGEFLAGS),
 143    update_swtnl_draw
 144 };
 145
 146
 147 int svga_swtnl_update_vdecl( struct svga_context *svga )
 148 {
 149    struct svga_vbuf_render *svga_render = svga_vbuf_render(svga->swtnl.backend);
 150    struct draw_context *draw = svga->swtnl.draw;
 151    struct vertex_info *vinfo = &svga_render->vertex_info;
 152    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 153    const enum interp_mode colorInterp =
 154       svga->curr.rast->templ.flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 155    const struct svga_fragment_shader *fs = svga->curr.fs;
 156    int offset = 0;
 157    int nr_decls = 0;
 158    int src, i;
 159
 160    memset(vinfo, 0, sizeof(*vinfo));
 161    memset(vdecl, 0, sizeof(vdecl));
 162
 163    /* always add position */
 164    src = draw_find_vs_output(draw, TGSI_SEMANTIC_POSITION, 0);
 165    draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_LINEAR, src);
 166    vinfo->attrib[0].emit = EMIT_4F;
 167    vdecl[0].array.offset = offset;
 168    vdecl[0].identity.type = SVGA3D_DECLTYPE_FLOAT4;
 169    vdecl[0].identity.usage = SVGA3D_DECLUSAGE_POSITIONT;
 170    vdecl[0].identity.usageIndex = 0;
 171    offset += 16;
 172    nr_decls++;
 173
 174    for (i = 0; i < fs->base.info.num_inputs; i++) {
 175       unsigned name = fs->base.info.input_semantic_name[i];
 176       unsigned index = fs->base.info.input_semantic_index[i];
 177       src = draw_find_vs_output(draw, name, index);
 178       vdecl[nr_decls].array.offset = offset;
 179       vdecl[nr_decls].identity.usageIndex = fs->base.info.input_semantic_index[i];
 180
 181       switch (name) {
 182       case TGSI_SEMANTIC_COLOR:
 183          draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
 184          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_COLOR;
 185          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
 186          offset += 16;
 187          nr_decls++;
 188          break;
 189       case TGSI_SEMANTIC_GENERIC:
 190          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
 191          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
 192          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
 193          vdecl[nr_decls].identity.usageIndex += 1;
 194          offset += 16;
 195          nr_decls++;
 196          break;
 197       case TGSI_SEMANTIC_FOG:
 198          draw_emit_vertex_attr(vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
 199          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
 200          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT1;
 201          assert(vdecl[nr_decls].identity.usageIndex == 0);
 202          offset += 4;
 203          nr_decls++;
 204          break;
 205       case TGSI_SEMANTIC_POSITION:
 206          /* generated internally, not a vertex shader output */
 207          break;
 208       default:
 209          assert(0);
 210       }
 211    }
 212
 213    draw_compute_vertex_size(vinfo);
 214
 215    svga_render->vdecl_count = nr_decls;
 216    for (i = 0; i < svga_render->vdecl_count; i++)
 217       vdecl[i].array.stride = offset;
 218
 219    if (memcmp(svga_render->vdecl, vdecl, sizeof(vdecl)) == 0)
 220       return 0;
 221
 222    memcpy(svga_render->vdecl, vdecl, sizeof(vdecl));
 223    svga->swtnl.new_vdecl = TRUE;
 224
 225    return 0;
 226 }
 227
 228
 229 static int update_swtnl_vdecl( struct svga_context *svga,
 230                                unsigned dirty )
 231 {
 232    return svga_swtnl_update_vdecl( svga );
 233 }
 234
 235
 236 struct svga_tracked_state svga_update_swtnl_vdecl =
 237 {
 238    "update draw module vdecl",
 239    (SVGA_NEW_VS |
 240     SVGA_NEW_FS),
 241    update_swtnl_vdecl
 242 };