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 "util/u_inlines.h"
  29 #include "pipe/p_state.h"
  30
  31 #include "svga_context.h"
  32 #include "svga_swtnl.h"
  33 #include "svga_state.h"
  34
  35 #include "svga_swtnl_private.h"
  36
  37
  38 #define SVGA_POINT_ADJ_X -0.375
  39 #define SVGA_POINT_ADJ_Y -0.5
  40
  41 #define SVGA_LINE_ADJ_X -0.5
  42 #define SVGA_LINE_ADJ_Y -0.5
  43
  44 #define SVGA_TRIANGLE_ADJ_X -0.375
  45 #define SVGA_TRIANGLE_ADJ_Y -0.5
  46
  47
  48 static void set_draw_viewport( struct svga_context *svga )
  49 {
  50    struct pipe_viewport_state vp = svga->curr.viewport;
  51    float adjx = 0;
  52    float adjy = 0;
  53
  54    switch (svga->curr.reduced_prim) {
  55    case PIPE_PRIM_POINTS:
  56       adjx = SVGA_POINT_ADJ_X;
  57       adjy = SVGA_POINT_ADJ_Y;
  58       break;
  59    case PIPE_PRIM_LINES:
  60       /* XXX: This is to compensate for the fact that wide lines are
  61        * going to be drawn with triangles, but we're not catching all
  62        * cases where that will happen.
  63        */
  64       if (svga->curr.rast->templ.line_width > 1.0)
  65       {
  66          adjx = SVGA_LINE_ADJ_X + 0.175;
  67          adjy = SVGA_LINE_ADJ_Y - 0.175;
  68       }
  69       else {
  70          adjx = SVGA_LINE_ADJ_X;
  71          adjy = SVGA_LINE_ADJ_Y;
  72       }
  73       break;
  74    case PIPE_PRIM_TRIANGLES:
  75       adjx += SVGA_TRIANGLE_ADJ_X;
  76       adjy += SVGA_TRIANGLE_ADJ_Y;
  77       break;
  78    }
  79
  80    vp.translate[0] += adjx;
  81    vp.translate[1] += adjy;
  82
  83    draw_set_viewport_state(svga->swtnl.draw, &vp);
  84 }
  85
  86 static int update_swtnl_draw( struct svga_context *svga,
  87                               unsigned dirty )
  88 {
  89    draw_flush( svga->swtnl.draw );
  90
  91    if (dirty & SVGA_NEW_VS)
  92       draw_bind_vertex_shader(svga->swtnl.draw,
  93                               svga->curr.vs->draw_shader);
  94
  95    if (dirty & SVGA_NEW_VBUFFER)
  96       draw_set_vertex_buffers(svga->swtnl.draw,
  97                               svga->curr.num_vertex_buffers,
  98                               svga->curr.vb);
  99
 100    if (dirty & SVGA_NEW_VELEMENT)
 101       draw_set_vertex_elements(svga->swtnl.draw,
 102                                svga->curr.velems->count,
 103                                svga->curr.velems->velem );
 104
 105    if (dirty & SVGA_NEW_CLIP)
 106       draw_set_clip_state(svga->swtnl.draw,
 107                           &svga->curr.clip);
 108
 109    if (dirty & (SVGA_NEW_VIEWPORT |
 110                 SVGA_NEW_REDUCED_PRIMITIVE |
 111                 SVGA_NEW_RAST))
 112       set_draw_viewport( svga );
 113
 114    if (dirty & SVGA_NEW_RAST)
 115       draw_set_rasterizer_state(svga->swtnl.draw,
 116                                 &svga->curr.rast->templ);
 117
 118    if (dirty & SVGA_NEW_FRAME_BUFFER)
 119       draw_set_mrd(svga->swtnl.draw,
 120                    svga->curr.depthscale);
 121
 122    return 0;
 123 }
 124
 125
 126 struct svga_tracked_state svga_update_swtnl_draw =
 127 {
 128    "update draw module state",
 129    (SVGA_NEW_VS |
 130     SVGA_NEW_VBUFFER |
 131     SVGA_NEW_VELEMENT |
 132     SVGA_NEW_CLIP |
 133     SVGA_NEW_VIEWPORT |
 134     SVGA_NEW_RAST |
 135     SVGA_NEW_FRAME_BUFFER |
 136     SVGA_NEW_REDUCED_PRIMITIVE),
 137    update_swtnl_draw
 138 };
 139
 140
 141 int svga_swtnl_update_vdecl( struct svga_context *svga )
 142 {
 143    struct svga_vbuf_render *svga_render = svga_vbuf_render(svga->swtnl.backend);
 144    struct draw_context *draw = svga->swtnl.draw;
 145    struct vertex_info *vinfo = &svga_render->vertex_info;
 146    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 147    const enum interp_mode colorInterp =
 148       svga->curr.rast->templ.flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 149    const struct svga_fragment_shader *fs = svga->curr.fs;
 150    int offset = 0;
 151    int nr_decls = 0;
 152    int src, i;
 153
 154    memset(vinfo, 0, sizeof(*vinfo));
 155    memset(vdecl, 0, sizeof(vdecl));
 156
 157    /* always add position */
 158    src = draw_find_shader_output(draw, TGSI_SEMANTIC_POSITION, 0);
 159    draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_LINEAR, src);
 160    vinfo->attrib[0].emit = EMIT_4F;
 161    vdecl[0].array.offset = offset;
 162    vdecl[0].identity.type = SVGA3D_DECLTYPE_FLOAT4;
 163    vdecl[0].identity.usage = SVGA3D_DECLUSAGE_POSITIONT;
 164    vdecl[0].identity.usageIndex = 0;
 165    offset += 16;
 166    nr_decls++;
 167
 168    for (i = 0; i < fs->base.info.num_inputs; i++) {
 169       unsigned name = fs->base.info.input_semantic_name[i];
 170       unsigned index = fs->base.info.input_semantic_index[i];
 171       src = draw_find_shader_output(draw, name, index);
 172       vdecl[nr_decls].array.offset = offset;
 173       vdecl[nr_decls].identity.usageIndex = fs->base.info.input_semantic_index[i];
 174
 175       switch (name) {
 176       case TGSI_SEMANTIC_COLOR:
 177          draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
 178          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_COLOR;
 179          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
 180          offset += 16;
 181          nr_decls++;
 182          break;
 183       case TGSI_SEMANTIC_GENERIC:
 184          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
 185          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
 186          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
 187          vdecl[nr_decls].identity.usageIndex += 1;
 188          offset += 16;
 189          nr_decls++;
 190          break;
 191       case TGSI_SEMANTIC_FOG:
 192          draw_emit_vertex_attr(vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
 193          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
 194          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT1;
 195          assert(vdecl[nr_decls].identity.usageIndex == 0);
 196          offset += 4;
 197          nr_decls++;
 198          break;
 199       case TGSI_SEMANTIC_POSITION:
 200          /* generated internally, not a vertex shader output */
 201          break;
 202       default:
 203          assert(0);
 204       }
 205    }
 206
 207    draw_compute_vertex_size(vinfo);
 208
 209    svga_render->vdecl_count = nr_decls;
 210    for (i = 0; i < svga_render->vdecl_count; i++)
 211       vdecl[i].array.stride = offset;
 212
 213    if (memcmp(svga_render->vdecl, vdecl, sizeof(vdecl)) == 0)
 214       return 0;
 215
 216    memcpy(svga_render->vdecl, vdecl, sizeof(vdecl));
 217    svga->swtnl.new_vdecl = TRUE;
 218
 219    return 0;
 220 }
 221
 222
 223 static int update_swtnl_vdecl( struct svga_context *svga,
 224                                unsigned dirty )
 225 {
 226    return svga_swtnl_update_vdecl( svga );
 227 }
 228
 229
 230 struct svga_tracked_state svga_update_swtnl_vdecl =
 231 {
 232    "update draw module vdecl",
 233    (SVGA_NEW_VS |
 234     SVGA_NEW_FS),
 235    update_swtnl_vdecl
 236 };