src/gallium/drivers/softpipe/sp_quad_output.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 "pipe/p_util.h"
  29 #include "sp_context.h"
  30 #include "sp_headers.h"
  31 #include "sp_surface.h"
  32 #include "sp_quad.h"
  33 #include "sp_tile_cache.h"
  34
  35
  36 /**
  37  * Write quad to framebuffer, taking mask into account.
  38  *
  39  * Note that surfaces support only full quad reads and writes.
  40  */
  41 static void
  42 output_quad(struct quad_stage *qs, struct quad_header *quad)
  43 {
  44    struct softpipe_context *softpipe = qs->softpipe;
  45    struct softpipe_cached_tile *tile
  46       = sp_get_cached_tile(softpipe,
  47                            softpipe->cbuf_cache[softpipe->current_cbuf],
  48                            quad->x0, quad->y0);
  49    /* in-tile pos: */
  50    const int itx = quad->x0 % TILE_SIZE;
  51    const int ity = quad->y0 % TILE_SIZE;
  52    float (*quadColor)[4] = quad->outputs.color;
  53    int i, j;
  54
  55    /* get/swizzle dest colors */
  56    for (j = 0; j < QUAD_SIZE; j++) {
  57       if (quad->mask & (1 << j)) {
  58          int x = itx + (j & 1);
  59          int y = ity + (j >> 1);
  60          for (i = 0; i < 4; i++) { /* loop over color chans */
  61             tile->data.color[y][x][i] = quadColor[i][j];
  62          }
  63       }
  64    }
  65 }
  66
  67
  68 static void output_begin(struct quad_stage *qs)
  69 {
  70    assert(qs->next == NULL);
  71 }
  72
  73
  74 static void output_destroy(struct quad_stage *qs)
  75 {
  76    FREE( qs );
  77 }
  78
  79
  80 struct quad_stage *sp_quad_output_stage( struct softpipe_context *softpipe )
  81 {
  82    struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
  83
  84    stage->softpipe = softpipe;
  85    stage->begin = output_begin;
  86    stage->run = output_quad;
  87    stage->destroy = output_destroy;
  88
  89    return stage;
  90 }