src/mesa/pipe/softpipe/sp_state_derived.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "main/glheader.h"
  29 #include "main/macros.h"
  30 #include "main/enums.h"
  31 #include "shader/program.h"
  32
  33 #include "vf/vf.h"
  34 #include "pipe/draw/draw_context.h"
  35 #include "sp_context.h"
  36 #include "sp_state.h"
  37
  38
  39 #define EMIT_ATTR( ATTR, FRAG_ATTR, INTERP )                    \
  40 do {                                                    \
  41    slot_to_vf_attr[softpipe->nr_attrs] = ATTR;  \
  42    softpipe->vf_attr_to_slot[ATTR] = softpipe->nr_attrs;        \
  43    softpipe->fp_attr_to_slot[FRAG_ATTR] = softpipe->nr_attrs;   \
  44    softpipe->interp[softpipe->nr_attrs] = INTERP;       \
  45    softpipe->nr_attrs++;        \
  46    attr_mask |= (1<<ATTR);      \
  47 } while (0)
  48
  49
  50 static GLuint frag_to_vf[FRAG_ATTRIB_MAX] =
  51 {
  52    VF_ATTRIB_POS,
  53    VF_ATTRIB_COLOR0,
  54    VF_ATTRIB_COLOR1,
  55    VF_ATTRIB_FOG,
  56    VF_ATTRIB_TEX0,
  57    VF_ATTRIB_TEX1,
  58    VF_ATTRIB_TEX2,
  59    VF_ATTRIB_TEX3,
  60    VF_ATTRIB_TEX4,
  61    VF_ATTRIB_TEX5,
  62    VF_ATTRIB_TEX6,
  63    VF_ATTRIB_TEX7,
  64 };
  65
  66
  67 /* Derived from:  fs, setup states.
  68  */
  69 static void calculate_vertex_layout( struct softpipe_context *softpipe )
  70 {
  71    struct gl_fragment_program *fp = softpipe->fs.fp;
  72    const GLuint inputsRead = fp->Base.InputsRead;
  73    GLuint slot_to_vf_attr[VF_ATTRIB_MAX];
  74    GLuint attr_mask = 0;
  75    GLuint i;
  76
  77    softpipe->nr_attrs = 0;
  78    memset(slot_to_vf_attr, 0, sizeof(slot_to_vf_attr));
  79
  80    memset(softpipe->fp_attr_to_slot, 0, sizeof(softpipe->fp_attr_to_slot));
  81    memset(softpipe->vf_attr_to_slot, 0, sizeof(softpipe->vf_attr_to_slot));
  82
  83    /* TODO - Figure out if we need to do perspective divide, etc.
  84     */
  85    EMIT_ATTR(VF_ATTRIB_POS, FRAG_ATTRIB_WPOS, INTERP_LINEAR);
  86
  87    /* Pull in the rest of the attributes.  They are all in float4
  88     * format.  Future optimizations could be to keep some attributes
  89     * as fixed point or ubyte format.
  90     */
  91    for (i = 1; i < FRAG_ATTRIB_TEX0; i++) {
  92       if (inputsRead & (i << i)) {
  93          EMIT_ATTR(frag_to_vf[i], i, INTERP_LINEAR);
  94       }
  95    }
  96
  97    for (i = FRAG_ATTRIB_TEX0; i < FRAG_ATTRIB_MAX; i++) {
  98       if (inputsRead & (i << i)) {
  99          EMIT_ATTR(frag_to_vf[i], i, INTERP_PERSPECTIVE);
 100       }
 101    }
 102
 103    softpipe->nr_frag_attrs = softpipe->nr_attrs;
 104
 105    /* Additional attributes required for setup: Just twosided
 106     * lighting.  Edgeflag is dealt with specially by setting bits in
 107     * the vertex header.
 108     */
 109    if (softpipe->setup.light_twoside) {
 110       if (inputsRead & FRAG_BIT_COL0) {
 111          EMIT_ATTR(VF_ATTRIB_BFC0, FRAG_ATTRIB_MAX, 0); /* XXX: mark as discarded after setup */
 112       }
 113
 114       if (inputsRead & FRAG_BIT_COL1) {
 115          EMIT_ATTR(VF_ATTRIB_BFC1, FRAG_ATTRIB_MAX, 0); /* XXX: discard after setup */
 116       }
 117    }
 118
 119    if (attr_mask != softpipe->attr_mask) {
 120       softpipe->attr_mask = attr_mask;
 121
 122       draw_set_vertex_attributes( softpipe->draw,
 123                                   slot_to_vf_attr,
 124                                   softpipe->nr_attrs );
 125    }
 126 }
 127
 128
 129 /* Hopefully this will remain quite simple, otherwise need to pull in
 130  * something like the state tracker mechanism.
 131  */
 132 void softpipe_update_derived( struct softpipe_context *softpipe )
 133 {
 134    if (softpipe->dirty & (SP_NEW_SETUP | SP_NEW_FS))
 135       calculate_vertex_layout( softpipe );
 136
 137    if (softpipe->dirty & (SP_NEW_BLEND | SP_NEW_DEPTH_TEST | SP_NEW_ALPHA_TEST | SP_NEW_FS))
 138       sp_build_quad_pipeline(softpipe);
 139
 140    softpipe->dirty = 0;
 141 }