[Openchrome-users] misplacement of GL viewport -- doubled coordinates

[Miguel Marte]

sorry for the non diff, only thing i have on my laptop right now is nano and
X.  Thomas can you check to see if its correct and up to mesa git for me?
Oh and if its correct you can take out that note about using drawXoff from
via_state.c.

via_ioctrl.c
change
         b.x1 = pbox[i].x1 - (vrb->drawX + vrb->drawXoff);
         b.x2 = pbox[i].x2 - (vrb->drawX + vrb->drawXoff);
         b.y1 = pbox[i].y1 - vrb->drawY;
         b.y2 = pbox[i].y2 - vrb->drawY;

to
     b.x1 = pbox[i].x1 - vrb->drawXoff;
     b.x2 = pbox[i].x2 - vrb->drawXoff;
     b.y1 = pbox[i].y1;
     b.y2 = pbox[i].y2;


via_context.c
change
   vmesa->front.orig = (vmesa->front.offset +
                        draw_buffer->drawY * vmesa->front.pitch +
                        draw_buffer->drawX * bytePerPixel);

   vmesa->front.origMap = (vmesa->front.map +
                           draw_buffer->drawY * vmesa->front.pitch +
                           draw_buffer->drawX * bytePerPixel);

   vmesa->back.orig = vmesa->back.offset;
   vmesa->depth.orig = vmesa->depth.offset;
   vmesa->back.origMap = vmesa->back.map;
   vmesa->depth.origMap = vmesa->depth.map;

to
   vmesa->front.orig = vmesa->front.orig;
   vmesa->front.origMap = vmesa->front.map;
   vmesa->back.orig = vmesa->back.offset;
   vmesa->depth.orig = vmesa->depth.offset;
   vmesa->back.origMap = vmesa->back.map;
   vmesa->depth.origMap = vmesa->depth.map;


via_state.c
change
    m[MAT_SX] =   v[MAT_SX];
    m[MAT_TX] =   v[MAT_TX] + SUBPIXEL_X + vrb->drawXoff;
    m[MAT_SY] = - v[MAT_SY];
    m[MAT_TY] = - v[MAT_TY] + dPriv->h + SUBPIXEL_Y;
    m[MAT_SZ] =   v[MAT_SZ] * (1.0 / vmesa->depth_max);
    m[MAT_TZ] =   v[MAT_TZ] * (1.0 / vmesa->depth_max);

to
    m[MAT_SX] =   v[MAT_SX];
    m[MAT_TX] =   v[MAT_TX] + SUBPIXEL_X + dPriv->x;
    m[MAT_SY] =  -v[MAT_SY];
    m[MAT_TY] =  -v[MAT_TY] + dPriv->y + dPriv->h + SUBPIXEL_Y;
    m[MAT_SZ] =   v[MAT_SZ] * (1.0 / vmesa->depth_max);
    m[MAT_TZ] =   v[MAT_TZ] * (1.0 / vmesa->depth_max);
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