workbench/libs/mesa/src/aros/mesa3dgl/mesa3dgl_glacreatecontext.c

   1 /*
   2     Copyright © 2009-2018, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #define DEBUG 0
   7 #include <aros/debug.h>
   8
   9 #include <proto/exec.h>
  10 #include <proto/gallium.h>
  11
  12 #include <gallium/gallium.h>
  13 #include <gallium/pipe/p_context.h>
  14 #include <gallium/pipe/p_screen.h>
  15
  16 #include "mesa3dgl_support.h"
  17 #include "mesa3dgl_gallium.h"
  18
  19 /*****************************************************************************
  20
  21     NAME */
  22
  23       GLAContext glACreateContext(
  24
  25 /*  SYNOPSIS */
  26       struct TagItem *tagList)
  27
  28 /*  FUNCTION
  29
  30         Creates a GL rendering context that can be later used in subsequent
  31         calls.
  32
  33     INPUTS
  34
  35         tagList - a pointer to tags to be used during creation.
  36
  37     TAGS
  38
  39         GLA_Left   - specifies the left rendering offset on the rastport.
  40                      Typically equals to window->BorderLeft.
  41
  42         GLA_Top    - specifies the top rendering offset on the rastport.
  43                      Typically equals to window->BorderTop.
  44
  45         GLA_Right  - specifies the right rendering offset on the rastport.
  46                      Typically equals to window->BorderRight.
  47
  48         GLA_Bottom - specifies the bottom rendering offset on the rastport.
  49                      Typically equals to window->BorderBottom.
  50
  51         GLA_Width  - specifies the width of the rendering area.
  52                      GLA_Width + GLA_Left + GLA_Right should equal the width of
  53                      the rastport. The GLA_Width is interchangable at cration
  54                      time with GLA_Right. Later durring window resizing, width
  55                      is calculated from scalled left, righ and window width.
  56
  57         GLA_Height - specifies the height of the rendering area.
  58                      GLA_Height + GLA_Top + GLA_Bottom should equal the height
  59                      of the rastport. The GLA_Height is interchangable at
  60                      cration time with GLA_Bottom. Later durring window resizing
  61                      , height is calculated from scalled top, bottom and window
  62                      height.
  63
  64         GLA_Screen - pointer to Screen onto which scene is to be rendered. When
  65                      selecting RastPort has lower priority than GLA_Window.
  66
  67         GLA_Window - pointer to Window onto which scene is to be rendered. Must
  68                      be provided.
  69
  70         GLA_RastPort - ignored. Use GLA_Window.
  71
  72         GLA_DoubleBuf - ignored. All rendering is always double buffered.
  73
  74         GLA_RGBMode - ignored. All rendering is done in RGB. Indexed modes are
  75                       not supported.
  76
  77         GLA_AlphaFlag - ignored. All rendering is done with alpha channel.
  78
  79         GLA_NoDepth - disables the depth/Z buffer. Depth buffer is enabled by
  80                       default and is 16 or 24 bit based on rendering
  81                       capabilities.
  82
  83         GLA_NoStencil - disables the stencil buffer. Stencil buffer is enabled
  84                         by default.
  85
  86         GLA_NoAccum - disables the accumulation buffer. Accumulation buffer is
  87                       enabled by default.
  88
  89     RESULT
  90
  91         A valid GL context or NULL if creation was not successful.
  92
  93     BUGS
  94
  95     INTERNALS
  96
  97     HISTORY
  98
  99 *****************************************************************************/
 100 {
 101     struct mesa3dgl_context * ctx = NULL;
 102     struct TagItem pscreen_tags[] =
 103     {
 104             { CPS_PipeFriendBitMap,     0       },
 105             { CPS_PipeScreenDriver,     0       },
 106             { TAG_DONE,                 0       }
 107     };
 108     struct pipe_screen * pscreen = NULL;
 109     struct st_context_attribs attribs = {0};
 110
 111     D(bug("[MESA3DGL] %s()\n", __func__));
 112
 113     /* Allocate MESA3DGL context */
 114     if (!(ctx = (struct mesa3dgl_context *)AllocVec(sizeof(struct mesa3dgl_context), MEMF_PUBLIC | MEMF_CLEAR)))
 115     {
 116         bug("%s: ERROR - failed to allocate GLAContext\n", __func__);
 117         return NULL;
 118     }
 119     pscreen_tags[1].ti_Data = (IPTR)&ctx->driver;
 120
 121     D(bug("[MESA3DGL] %s: ctx @ 0x%p\n", __func__, ctx));
 122
 123     MESA3DGLSelectRastPort(ctx, tagList);
 124     if (!ctx->visible_rp)
 125     {
 126         bug("%s: ERROR - failed to select visible rastport\n", __func__);
 127         goto error_out;
 128     }
 129
 130     D(bug("[MESA3DGL] %s: visible_rp @ 0x%p\n", __func__, ctx->visible_rp));
 131     pscreen_tags[0].ti_Data = (IPTR)ctx->visible_rp->BitMap;
 132     D(bug("[MESA3DGL] %s:   _bmap @ 0x%p\n", __func__, pscreen_tags[0].ti_Data));
 133
 134     MESA3DGLStandardInit(ctx, tagList);
 135
 136     if (CreatePipeV(pscreen_tags))
 137     {
 138         pscreen = CreatePipeScreen(ctx->driver);
 139         if (!pscreen)
 140         {
 141             bug("%s: ERROR -  failed to create gallium pipe screen\n", __func__);
 142             goto error_out;
 143         }
 144     }
 145     else
 146     {
 147         bug("%s: ERROR -  failed to create gallium pipe\n", __func__);
 148         goto error_out;
 149     }
 150
 151     D(bug("[MESA3DGL] %s: pipe screen @ 0x%p\n", __func__, pscreen));
 152     D(bug("[MESA3DGL] %s: pipe driver @ 0x%p\n", __func__, ctx->driver));
 153
 154     if (!(ctx->stmanager = MESA3DGLNewStManager(pscreen)))
 155     {
 156         bug("%s: ERROR - failed to create ST Manager\n");
 157         DestroyPipeScreen(ctx->driver, pscreen);
 158         goto error_out;
 159     }
 160
 161     D(bug("[MESA3DGL] %s: ST Manager @ 0x%p \n", __func__, ctx->stmanager));
 162
 163     if (!MESA3DGLFillVisual(&ctx->stvis, ctx->stmanager->screen, ctx->BitsPerPixel, tagList))
 164     {
 165         bug("%s: ERROR -  failed to fill ST Visual\n", __func__);
 166         goto error_out;
 167     }
 168
 169     attribs.profile = ST_PROFILE_DEFAULT;
 170     attribs.visual = ctx->stvis;
 171
 172     ctx->st = glstapi->create_context(glstapi, ctx->stmanager, &attribs, NULL);
 173     if (!ctx->st)
 174     {
 175         bug("%s: ERROR -  failed to create mesa state tracker context\n", __func__);
 176         goto error_out;
 177     }
 178
 179     ctx->framebuffer = MESA3DGLNewFrameBuffer(ctx, &ctx->stvis);
 180
 181     if (!ctx->framebuffer)
 182     {
 183         bug("%s: ERROR -  failed to create frame buffer\n", __func__);
 184         goto error_out;
 185     }
 186
 187     return (GLAContext)ctx;
 188
 189 error_out:
 190     if (ctx->stmanager) MESA3DGLFreeStManager(ctx->driver, ctx->stmanager);
 191     if (ctx) MESA3DGLFreeContext(ctx);
 192     return (GLAContext)NULL;
 193 }