workbench/libs/mesa/src/gallium/state_trackers/arosmesa/glacreatecontext.c

   1 /*
   2     Copyright 2009-2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include "arosmesa_funcs.h"
   7 #include "arosmesa_funcs_gallium.h"
   8 #include <proto/exec.h>
   9 #include <aros/debug.h>
  10 #include <proto/gallium.h>
  11 #include <gallium/gallium.h>
  12 #include <gallium/pipe/p_context.h>
  13 #include <gallium/pipe/p_screen.h>
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18
  19       GLAContext glACreateContext(
  20
  21 /*  SYNOPSIS */
  22       struct TagItem *tagList)
  23
  24 /*  FUNCTION
  25
  26         Crates a GL rendering context that can be later used in subsequent
  27         calls.
  28
  29     INPUTS
  30
  31         tagList - a pointer to tags to be used during creation.
  32
  33     TAGS
  34
  35         GLA_Left   - specifies the left rendering offset on the rastport.
  36                      Typically equals to window->BorderLeft.
  37
  38         GLA_Top    - specifies the top rendering offset on the rastport.
  39                      Typically equals to window->BorderTop.
  40
  41         GLA_Right  - specifies the right rendering offset on the rastport.
  42                      Typically equals to window->BorderRight.
  43
  44         GLA_Bottom - specifies the bottom rendering offset on the rastport.
  45                      Typically equals to window->BorderBottom.
  46
  47         GLA_Width  - specifies the width of the rendering area.
  48                      GLA_Width + GLA_Left + GLA_Right should equal the width of
  49                      the rastport. The GLA_Width is interchangable at cration
  50                      time with GLA_Right. Later durring window resizing, width
  51                      is calculated from scalled left, righ and window width.
  52
  53         GLA_Height - specifies the height of the rendering area.
  54                      GLA_Height + GLA_Top + GLA_Bottom should equal the height
  55                      of the rastport. The GLA_Height is interchangable at
  56                      cration time with GLA_Bottom. Later durring window resizing
  57                      , height is calculated from scalled top, bottom and window
  58                      height.
  59
  60         GLA_Screen - pointer to Screen onto which scene is to be rendered. When
  61                      selecting RastPort has lower priority than GLA_Window.
  62
  63         GLA_Window - pointer to Window onto which scene is to be rendered. Must
  64                      be provided.
  65
  66         GLA_RastPort - ignored. Use GLA_Window.
  67
  68         GLA_DoubleBuf - ignored. All rendering is always double buffered.
  69
  70         GLA_RGBMode - ignored. All rendering is done in RGB. Indexed modes are
  71                       not supported.
  72
  73         GLA_AlphaFlag - ignored. All rendering is done with alpha channel.
  74
  75         GLA_NoDepth - disables the depth/Z buffer. Depth buffer is enabled by
  76                       default and is 16 or 24 bit based on rendering
  77                       capabilities.
  78
  79         GLA_NoStencil - disables the stencil buffer. Stencil buffer is enabled
  80                         by default.
  81
  82         GLA_NoAccum - disables the accumulation buffer. Accumulation buffer is
  83                       enabled by default.
  84
  85     RESULT
  86
  87         A valid GL context or NULL of creation was not succesfull.
  88
  89     BUGS
  90
  91     INTERNALS
  92
  93     HISTORY
  94
  95 *****************************************************************************/
  96 {
  97     struct arosmesa_context * amesa = NULL;
  98     struct pipe_screen * pscreen = NULL;
  99     struct st_context_attribs attribs = {0};
 100
 101     /* Allocate arosmesa_context struct initialized to zeros */
 102     if (!(amesa = (struct arosmesa_context *)AllocVec(sizeof(struct arosmesa_context), MEMF_PUBLIC | MEMF_CLEAR)))
 103     {
 104         D(bug("[AROSMESA] AROSMesaCreateContext: ERROR - failed to allocate AROSMesaContext\n"));
 105         return NULL;
 106     }
 107
 108     AROSMesaSelectRastPort(amesa, tagList);
 109     if (!amesa->visible_rp)
 110     {
 111         D(bug("[AROSMESA] AROSMesaCreateContext: ERROR - failed to select visible rastport\n"));
 112         goto error_out;
 113     }
 114
 115     AROSMesaStandardInit(amesa, tagList);
 116
 117     pscreen = CreatePipeScreenV(NULL);
 118     if (!pscreen)
 119     {
 120         D(bug("[AROSMESA] AROSMesaCreateContext: ERROR -  failed to create gallium pipe screen\n"));
 121         goto error_out;
 122     }
 123
 124     if (!(amesa->stmanager = AROSMesaNewStManager(pscreen)))
 125     {
 126         D(bug("[AROSMESA] AROSMesaCreateContext: ERROR - failed to create ST Manager\n"));
 127         DestroyPipeScreen(pscreen);
 128         goto error_out;
 129     }
 130
 131     D(bug("[AROSMESA] AROSMesaCreateContext: Filling ST Visual \n"));
 132     if (!AROSMesaFillVisual(&amesa->stvis, amesa->stmanager->screen, amesa->BitsPerPixel, tagList))
 133     {
 134         D(bug("[AROSMESA] AROSMesaCreateContext: ERROR -  failed to fill ST Visual\n"));
 135         goto error_out;
 136     }
 137
 138     attribs.profile = ST_PROFILE_DEFAULT;
 139     attribs.visual = amesa->stvis;
 140
 141     amesa->st = glstapi->create_context(glstapi, amesa->stmanager, &attribs, NULL);
 142     if (!amesa->st)
 143     {
 144         D(bug("[AROSMESA] AROSMesaCreateContext: ERROR -  failed to create mesa state tracker context\n"));
 145         goto error_out;
 146     }
 147
 148     amesa->framebuffer = AROSMesaNewFrameBuffer(amesa, &amesa->stvis);
 149
 150     if (!amesa->framebuffer)
 151     {
 152         D(bug("[AROSMESA] AROSMesaCreateContext: ERROR -  failed to create frame buffer\n"));
 153         goto error_out;
 154     }
 155
 156     return amesa;
 157
 158 error_out:
 159     if (amesa->stmanager) AROSMesaFreeStManager(amesa->stmanager);
 160     if (amesa) AROSMesaFreeContext(amesa);
 161     return NULL;
 162 }