src/mesa/state_tracker/st_cb_clear.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  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.
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  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "st_context.h"
  35 #include "glheader.h"
  36 #include "macros.h"
  37 #include "enums.h"
  38 #include "st_context.h"
  39 #include "st_atom.h"
  40 #include "pipe/p_context.h"
  41
  42
  43
  44 /* XXX: doesn't pick up the differences between front/back/left/right
  45  * clears.  Need to sort that out...
  46  */
  47 static void st_clear(GLcontext *ctx, GLbitfield mask)
  48 {
  49    struct st_context *st = ctx->st;
  50    GLboolean color = (mask & BUFFER_BITS_COLOR) ? GL_TRUE : GL_FALSE;
  51    GLboolean depth = (mask & BUFFER_BIT_DEPTH) ? GL_TRUE : GL_FALSE;
  52    GLboolean stencil = (mask & BUFFER_BIT_STENCIL) ? GL_TRUE : GL_FALSE;
  53    GLboolean accum = (mask & BUFFER_BIT_ACCUM) ? GL_TRUE : GL_FALSE;
  54    GLboolean fullscreen = 1;    /* :-) */
  55
  56    /* This makes sure the softpipe has the latest scissor, etc values */
  57    st_validate_state( st );
  58
  59    if (fullscreen) {
  60       /* pipe->clear() should clear a particular surface, so that we
  61        * can iterate over render buffers at this level and clear the
  62        * ones GL is asking for.
  63        *
  64        * Will probably need something like pipe->clear_z_stencil() to
  65        * cope with the special case of paired and unpaired z/stencil
  66        * buffers, though could perhaps deal with them explicitly at
  67        * this level.
  68        */
  69       st->pipe->clear(st->pipe, color, depth, stencil, accum);
  70    }
  71    else {
  72       /* Convert to geometry, etc:
  73        */
  74    }
  75 }
  76
  77
  78 void st_init_cb_clear( struct st_context *st )
  79 {
  80    struct dd_function_table *functions = &st->ctx->Driver;
  81
  82    functions->Clear = st_clear;
  83 }
  84
  85
  86 void st_destroy_cb_clear( struct st_context *st )
  87 {
  88 }
  89