workbench/libs/mesa/mesa3dgl_glagetconfig.c

   1 /*
   2     Copyright © 2011-2019, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/debug.h>
   7
   8 #include <proto/exec.h>
   9
  10 #include "mesa3dgl_types.h"
  11 #include "mesa3dgl_support.h"
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16
  17       void glAGetConfig(
  18
  19 /*  SYNOPSIS */
  20       GLAContext ctx,
  21       GLenum pname,
  22       GLint * params)
  23
  24 /*  FUNCTION
  25
  26         Gets value of selected parameter
  27
  28     INPUTS
  29
  30         pname - enum value of parameter
  31
  32         params - pointer to integer where the value is to be put
  33
  34     RESULT
  35
  36         None
  37
  38     BUGS
  39
  40     INTERNALS
  41
  42     HISTORY
  43
  44 *****************************************************************************/
  45 {
  46     LONG depthbits, stencilbits, accumbits, rbbits, gbits, abits;
  47     struct mesa3dgl_context *_ctx = (struct mesa3dgl_context *)ctx;
  48
  49     D(bug("[MESA3DGL] %s()\n", __func__));
  50
  51     switch(_ctx->stvis.depth_stencil_format)
  52     {
  53         case(PIPE_FORMAT_S8_UINT_Z24_UNORM): depthbits = 24; stencilbits = 8; break;
  54         case(PIPE_FORMAT_X8Z24_UNORM): depthbits = 24; stencilbits = 0; break;
  55         case(PIPE_FORMAT_Z24X8_UNORM): depthbits = 24; stencilbits = 0; break;
  56         case(PIPE_FORMAT_Z16_UNORM): depthbits = 16; stencilbits = 0; break;
  57         default: depthbits = -1; stencilbits = -1;
  58     }
  59
  60     switch(_ctx->stvis.accum_format)
  61     {
  62         case(PIPE_FORMAT_R16G16B16A16_SNORM): accumbits = 16; break;
  63         default: accumbits = -1;
  64     }
  65
  66     switch(_ctx->stvis.color_format)
  67     {
  68         case(PIPE_FORMAT_B5G6R5_UNORM): rbbits = 5; gbits = 6; abits = 0; break;
  69         case(PIPE_FORMAT_B8G8R8A8_UNORM): rbbits = 8; gbits = 8; abits = 8; break;
  70         default: rbbits = -1; gbits = -1; abits = 1;
  71     }
  72
  73     if (_ctx)
  74     {
  75         switch(pname)
  76         {
  77             case GL_RED_BITS:
  78                 *params = rbbits;
  79                 break;
  80             case GL_GREEN_BITS:
  81                 *params = gbits;
  82                 break;
  83             case GL_BLUE_BITS:
  84                 *params = rbbits;
  85                 break;
  86             case GL_ALPHA_BITS:
  87                 *params = abits;
  88                 break;
  89             case GL_DOUBLEBUFFER:
  90                 *params = 1;
  91                 break;
  92             case GL_DEPTH_BITS:
  93                 *params = depthbits;
  94                 break;
  95             case GL_STENCIL_BITS:
  96                 *params = stencilbits;
  97                 break;
  98             case GL_ACCUM_RED_BITS:
  99                 *params = accumbits;
 100                 break;
 101             case GL_ACCUM_GREEN_BITS:
 102                 *params = accumbits;
 103                 break;
 104             case GL_ACCUM_BLUE_BITS:
 105                 *params = accumbits;
 106                 break;
 107             case GL_ACCUM_ALPHA_BITS:
 108                 *params = accumbits;
 109                 break;
 110             case GL_STEREO:
 111                 *params = 0;
 112                 break;
 113             default:
 114                 *params = -1;
 115         }
 116     }
 117 }
 118