workbench/libs/mesa/src/aros/mesa3dgl/mesa3dgl_support.c

   1 /*
   2     Copyright 2009-2015, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/debug.h>
   7
   8 #include <proto/utility.h>
   9 #include <proto/exec.h>
  10 #include <proto/graphics.h>
  11 #include <proto/cybergraphics.h>
  12
  13 #include <cybergraphx/cybergraphics.h>
  14 #include <graphics/rpattr.h>
  15
  16 #include "mesa3dgl_support.h"
  17
  18 VOID MESA3DGLSelectRastPort(struct mesa3dgl_context * ctx, struct TagItem * tagList)
  19 {
  20     ctx->Screen = (struct Screen *)GetTagData(GLA_Screen, 0, tagList);
  21     ctx->window = (struct Window *)GetTagData(GLA_Window, 0, tagList);
  22     ctx->visible_rp = (struct RastPort *)GetTagData(GLA_RastPort, 0, tagList);
  23
  24     if (ctx->Screen)
  25     {
  26         D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Screen @ %x\n", ctx->Screen));
  27         if (ctx->window)
  28         {
  29             D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Window @ %x\n", ctx->window));
  30             if (!(ctx->visible_rp))
  31             {
  32                 /* Use the windows rastport */
  33                 ctx->visible_rp = ctx->window->RPort;
  34                 D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Windows RastPort @ %x\n", ctx->visible_rp));
  35             }
  36         }
  37         else
  38         {
  39             if (!(ctx->visible_rp))
  40             {
  41                 /* Use the screens rastport */
  42                 ctx->visible_rp = &ctx->Screen->RastPort;
  43                 D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Screens RastPort @ %x\n", ctx->visible_rp));
  44             }
  45         }
  46     }
  47     else
  48     {
  49         /* Not passed a screen */
  50         if (ctx->window)
  51         {
  52             D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Window @ %x\n", ctx->window));
  53             /* Use the windows Screen */
  54             ctx->Screen = ctx->window->WScreen;
  55             D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Windows Screen @ %x\n", ctx->Screen));
  56
  57             if (!(ctx->visible_rp))
  58             {
  59                 /* Use the windows rastport */
  60                 ctx->visible_rp = ctx->window->RPort;
  61                 D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Windows RastPort @ %x\n", ctx->visible_rp));
  62             }
  63         }
  64         else
  65         {
  66             /* Only Passed A Rastport */
  67             D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Using RastPort only!\n"));
  68         }
  69     }
  70
  71     D(bug("[MESA3DGL] MESA3DGLSelectRastPort: Using RastPort @ %x\n", ctx->visible_rp));
  72 }
  73
  74 BOOL MESA3DGLStandardInit(struct mesa3dgl_context * ctx, struct TagItem *tagList)
  75 {
  76     LONG requestedwidth = 0, requestedheight = 0;
  77     LONG requestedright = 0, requestedbottom = 0;
  78     LONG defaultleft = 0, defaulttop = 0;
  79     LONG defaultright = 0, defaultbottom = 0;
  80
  81     /* Set the defaults based on window information */
  82     if (ctx->window)
  83     {
  84         if(!(ctx->window->Flags & WFLG_GIMMEZEROZERO))
  85         {
  86             defaultleft     = ctx->window->BorderLeft;
  87             defaulttop      = ctx->window->BorderTop;
  88             defaultright    = ctx->window->BorderRight;
  89             defaultbottom   = ctx->window->BorderBottom;
  90         }
  91     }
  92
  93     D(bug("[MESA3DGL] MESA3DGLStandardInit(ctx @ %x, taglist @ %x)\n", ctx, tagList));
  94     D(bug("[MESA3DGL] MESA3DGLStandardInit: Using RastPort @ %x\n", ctx->visible_rp));
  95
  96     ctx->visible_rp = CloneRastPort(ctx->visible_rp);
  97
  98     D(bug("[MESA3DGL] MESA3DGLStandardInit: Cloned RastPort @ %x\n", ctx->visible_rp));
  99
 100     /* We assume left and top are given or if there is a window, set to border left/top
 101        or if there is no window set to 0 */
 102     ctx->left = GetTagData(GLA_Left, defaultleft, tagList);
 103     ctx->top = GetTagData(GLA_Top, defaulttop, tagList);
 104
 105     requestedright = GetTagData(GLA_Right, -1, tagList);
 106     requestedbottom = GetTagData(GLA_Bottom, -1, tagList);
 107     requestedwidth = GetTagData(GLA_Width, -1 , tagList);
 108     requestedheight = GetTagData(GLA_Height, -1 , tagList);
 109
 110     /* Calculate rastport dimensions */
 111     ctx->visible_rp_width =
 112         ctx->visible_rp->Layer->bounds.MaxX - ctx->visible_rp->Layer->bounds.MinX + 1;
 113
 114     ctx->visible_rp_height =
 115         ctx->visible_rp->Layer->bounds.MaxY - ctx->visible_rp->Layer->bounds.MinY + 1;
 116
 117     /* right will be either passed or calculated from width or 0 */
 118     ctx->right = 0;
 119     if (requestedright < 0)
 120     {
 121         if (requestedwidth >= 0)
 122         {
 123             requestedright = ctx->visible_rp_width - ctx->left - requestedwidth;
 124             if (requestedright < 0) requestedright = 0;
 125         }
 126         else
 127             requestedright = defaultright; /* Set the default here, not in GetDataData */
 128     }
 129     ctx->right = requestedright;
 130
 131     /* bottom will be either passed or calculated from height or 0 */
 132     ctx->bottom = 0;
 133     if (requestedbottom < 0)
 134     {
 135         if (requestedheight >= 0)
 136         {
 137             requestedbottom = ctx->visible_rp_height - ctx->top - requestedheight;
 138             if (requestedbottom < 0) requestedbottom = 0;
 139         }
 140         else
 141             requestedbottom = defaultbottom; /* Set the default here, not in GetDataData */
 142     }
 143     ctx->bottom = requestedbottom;
 144
 145     /* Init screen information */
 146     if (ctx->Screen)
 147         ctx->BitsPerPixel  = GetCyberMapAttr(ctx->Screen->RastPort.BitMap, CYBRMATTR_BPPIX) * 8;
 148
 149     D(bug("[MESA3DGL] MESA3DGLStandardInit: Context Base dimensions set -:\n"));
 150     D(bug("[MESA3DGL] MESA3DGLStandardInit:    ctx->visible_rp_width        = %d\n", ctx->visible_rp_width));
 151     D(bug("[MESA3DGL] MESA3DGLStandardInit:    ctx->visible_rp_height       = %d\n", ctx->visible_rp_height));
 152     D(bug("[MESA3DGL] MESA3DGLStandardInit:    ctx->left                    = %d\n", ctx->left));
 153     D(bug("[MESA3DGL] MESA3DGLStandardInit:    ctx->right                   = %d\n", ctx->right));
 154     D(bug("[MESA3DGL] MESA3DGLStandardInit:    ctx->top                     = %d\n", ctx->top));
 155     D(bug("[MESA3DGL] MESA3DGLStandardInit:    ctx->bottom                  = %d\n", ctx->bottom));
 156
 157     return TRUE;
 158 }
 159
 160 VOID MESA3DGLRecalculateBufferWidthHeight(struct mesa3dgl_context * ctx)
 161 {
 162     ULONG newwidth = 0;
 163     ULONG newheight = 0;
 164
 165     D(bug("[MESA3DGL] MESA3DGLRecalculateBufferWidthHeight\n"));
 166
 167
 168     ctx->visible_rp_width =
 169         ctx->visible_rp->Layer->bounds.MaxX - ctx->visible_rp->Layer->bounds.MinX + 1;
 170
 171     ctx->visible_rp_height =
 172         ctx->visible_rp->Layer->bounds.MaxY - ctx->visible_rp->Layer->bounds.MinY + 1;
 173
 174
 175     newwidth = ctx->visible_rp_width - ctx->left - ctx->right;
 176     newheight = ctx->visible_rp_height - ctx->top - ctx->bottom;
 177
 178     if (newwidth < 0) newwidth = 0;
 179     if (newheight < 0) newheight = 0;
 180
 181
 182     if ((newwidth != ctx->framebuffer->width) || (newheight != ctx->framebuffer->height))
 183     {
 184         /* The drawing area size has changed. Buffer must change */
 185         D(bug("[MESA3DGL] MESA3DGLRecalculateBufferWidthHeight: current height    =   %d\n", ctx->framebuffer->height));
 186         D(bug("[MESA3DGL] MESA3DGLRecalculateBufferWidthHeight: current width     =   %d\n", ctx->framebuffer->width));
 187         D(bug("[MESA3DGL] MESA3DGLRecalculateBufferWidthHeight: new height        =   %d\n", newheight));
 188         D(bug("[MESA3DGL] MESA3DGLRecalculateBufferWidthHeight: new width         =   %d\n", newwidth));
 189
 190         ctx->framebuffer->width = newwidth;
 191         ctx->framebuffer->height = newheight;
 192         ctx->framebuffer->resized = TRUE;
 193
 194         if (ctx->window)
 195         {
 196             struct Rectangle rastcliprect;
 197             struct TagItem crptags[] =
 198             {
 199                 { RPTAG_ClipRectangle      , (IPTR)&rastcliprect },
 200                 { RPTAG_ClipRectangleFlags , (RPCRF_RELRIGHT | RPCRF_RELBOTTOM) },
 201                 { TAG_DONE }
 202             };
 203
 204             D(bug("[MESA3DGL] MESA3DGLRecalculateBufferWidthHeight: Clipping Rastport to Window's dimensions\n"));
 205
 206             /* Clip the rastport to the visible area */
 207             rastcliprect.MinX = ctx->left;
 208             rastcliprect.MinY = ctx->top;
 209             rastcliprect.MaxX = ctx->left + ctx->framebuffer->width;
 210             rastcliprect.MaxY = ctx->top + ctx->framebuffer->height;
 211             SetRPAttrsA(ctx->visible_rp, crptags);
 212         }
 213     }
 214 }
 215
 216 VOID MESA3DGLFreeContext(struct mesa3dgl_context * ctx)
 217 {
 218     if (ctx)
 219     {
 220         FreeVec(ctx);
 221     }
 222 }