/* $XFree86$ */ /* -*- mode: c; c-basic-offset: 3 -*- */
/*
 * Copyright 2000 Gareth Hughes
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * GARETH HUGHES BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * Authors:
 *	Gareth Hughes <gareth@valinux.com>
 *	Leif Delgass <ldelgass@retinalburn.net>
 *	José Fonseca <j_r_fonseca@yahoo.co.uk>
 */

#include "glheader.h"
#include "context.h"
#include "simple_list.h"
#include "imports.h"
#include "matrix.h"
#include "extensions.h"

#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "array_cache/acache.h"

#include "tnl/tnl.h"
#include "tnl/t_pipeline.h"

#include "drivers/common/driverfuncs.h"

#include "mach64_context.h"
#include "mach64_ioctl.h"
#include "mach64_dd.h"
#include "mach64_span.h"
#include "mach64_state.h"
#include "mach64_tex.h"
#include "mach64_tris.h"
#include "mach64_vb.h"

#include "utils.h"
#include "vblank.h"

#ifndef MACH64_DEBUG
int MACH64_DEBUG = (0);
#endif

static const struct dri_debug_control debug_control[] =
{
    { "sync",   DEBUG_ALWAYS_SYNC },
    { "api",    DEBUG_VERBOSE_API },
    { "msg",    DEBUG_VERBOSE_MSG },
    { "lru",    DEBUG_VERBOSE_LRU },
    { "dri",    DEBUG_VERBOSE_DRI },
    { "ioctl",  DEBUG_VERBOSE_IOCTL },
    { "prims",  DEBUG_VERBOSE_PRIMS },
    { "count",  DEBUG_VERBOSE_COUNT },
    { "nowait", DEBUG_NOWAIT },
    { NULL,    0 }
};

static const char * const card_extensions[] =
{
   "GL_ARB_multitexture",
   "GL_EXT_texture_edge_clamp",
   "GL_MESA_ycbcr_texture",
   "GL_SGIS_generate_mipmap",
   "GL_SGIS_texture_edge_clamp",
   NULL
};


/* Create the device specific context.
  */
GLboolean mach64CreateContext( const __GLcontextModes *glVisual,
			       __DRIcontextPrivate *driContextPriv,
                               void *sharedContextPrivate )
{
   GLcontext *ctx, *shareCtx;
   __DRIscreenPrivate *driScreen = driContextPriv->driScreenPriv;
   struct dd_function_table functions;
   mach64ContextPtr mmesa;
   mach64ScreenPtr mach64Screen;
   int i, heap;

#if DO_DEBUG
   MACH64_DEBUG = driParseDebugString(getenv("MACH64_DEBUG"), debug_control);
#endif

   /* Allocate the mach64 context */
   mmesa = (mach64ContextPtr) CALLOC( sizeof(*mmesa) );
   if ( !mmesa ) 
      return GL_FALSE;

   /* Init default driver functions then plug in our Mach64-specific functions
    * (the texture functions are especially important)
    */
   _mesa_init_driver_functions( &functions );
   mach64InitDriverFuncs( &functions );
   mach64InitIoctlFuncs( &functions );
   mach64InitTextureFuncs( &functions );

   /* Allocate the Mesa context */
   if (sharedContextPrivate)
      shareCtx = ((mach64ContextPtr) sharedContextPrivate)->glCtx;
   else 
      shareCtx = NULL;
   mmesa->glCtx = _mesa_create_context(glVisual, shareCtx, 
					&functions, (void *)mmesa);
   if (!mmesa->glCtx) {
      FREE(mmesa);
      return GL_FALSE;
   }
   driContextPriv->driverPrivate = mmesa;
   ctx = mmesa->glCtx;

   mmesa->driContext = driContextPriv;
   mmesa->driScreen = driScreen;
   mmesa->driDrawable = NULL;
   mmesa->hHWContext = driContextPriv->hHWContext;
   mmesa->driHwLock = &driScreen->pSAREA->lock;
   mmesa->driFd = driScreen->fd;

   mach64Screen = mmesa->mach64Screen = (mach64ScreenPtr)driScreen->private;

   /* Parse configuration files */
   driParseConfigFiles (&mmesa->optionCache, &mach64Screen->optionCache,
                        mach64Screen->driScreen->myNum, "mach64");

   mmesa->sarea = (ATISAREAPrivPtr)((char *)driScreen->pSAREA +
				    sizeof(XF86DRISAREARec));

   mmesa->CurrentTexObj[0] = NULL;
   mmesa->CurrentTexObj[1] = NULL;

   make_empty_list( &mmesa->SwappedOut );

   mmesa->firstTexHeap = mach64Screen->firstTexHeap;
   mmesa->lastTexHeap = mach64Screen->firstTexHeap + mach64Screen->numTexHeaps;

   for ( i = mmesa->firstTexHeap ; i < mmesa->lastTexHeap ; i++ ) {
      make_empty_list( &mmesa->TexObjList[i] );
      mmesa->texHeap[i] = mmInit( 0, mach64Screen->texSize[i] );
      mmesa->lastTexAge[i] = -1;
   }

   mmesa->RenderIndex = -1;		/* Impossible value */
   mmesa->vert_buf = NULL;
   mmesa->num_verts = 0;
   mmesa->new_state = MACH64_NEW_ALL;
   mmesa->dirty = MACH64_UPLOAD_ALL;

   /* Set the maximum texture size small enough that we can
    * guarentee that both texture units can bind a maximal texture
    * and have them both in memory (on-card or AGP) at once.
    * Test for 2 textures * bytes/texel * size * size.  There's no
    * need to account for mipmaps since we only upload one level.
    */
   heap = mach64Screen->IsPCI ? MACH64_CARD_HEAP : MACH64_AGP_HEAP;

   if ( mach64Screen->texSize[heap] >= 2 * mach64Screen->cpp * 1024*1024 ) {
      ctx->Const.MaxTextureLevels = 11; /* 1024x1024 */
   } else if ( mach64Screen->texSize[heap] >= 2 * mach64Screen->cpp * 512*512 ) {
      ctx->Const.MaxTextureLevels = 10; /* 512x512 */
   } else {
      ctx->Const.MaxTextureLevels = 9;  /* 256x256 */
   }

   ctx->Const.MaxTextureUnits = 2;

#if ENABLE_PERF_BOXES
   mmesa->boxes = ( getenv( "LIBGL_PERFORMANCE_BOXES" ) != NULL );
#endif

   /* Allocate the vertex buffer
    */
   mmesa->vert_buf = ALIGN_MALLOC(MACH64_BUFFER_SIZE, 32);
   if ( !mmesa->vert_buf )
      return GL_FALSE;
   mmesa->vert_used = 0;
   mmesa->vert_total = MACH64_BUFFER_SIZE;
   
   /* Initialize the software rasterizer and helper modules.
    */
   _swrast_CreateContext( ctx );
   _ac_CreateContext( ctx );
   _tnl_CreateContext( ctx );
   _swsetup_CreateContext( ctx );

   /* Install the customized pipeline:
    */
/*     _tnl_destroy_pipeline( ctx ); */
/*     _tnl_install_pipeline( ctx, mach64_pipeline ); */

   /* Configure swrast to match hardware characteristics:
    */
   _swrast_allow_pixel_fog( ctx, GL_FALSE );
   _swrast_allow_vertex_fog( ctx, GL_TRUE );

   driInitExtensions( ctx, card_extensions, GL_TRUE );

   mach64InitVB( ctx );
   mach64InitTriFuncs( ctx );
   mach64DDInitStateFuncs( ctx );
   mach64DDInitSpanFuncs( ctx );
   mach64DDInitState( mmesa );

   mmesa->do_irqs = (mmesa->mach64Screen->irq && !getenv("MACH64_NO_IRQS"));

   mmesa->vblank_flags = (mmesa->do_irqs)
      ? driGetDefaultVBlankFlags(&mmesa->optionCache) : VBLANK_FLAG_NO_IRQ;

   driContextPriv->driverPrivate = (void *)mmesa;

   return GL_TRUE;
}

/* Destroy the device specific context.
 */
void mach64DestroyContext( __DRIcontextPrivate *driContextPriv  )
{
   mach64ContextPtr mmesa = (mach64ContextPtr) driContextPriv->driverPrivate;

   assert(mmesa);  /* should never be null */
   if ( mmesa ) {
      if (mmesa->glCtx->Shared->RefCount == 1) {
         /* This share group is about to go away, free our private
          * texture object data.
          */
         mach64TexObjPtr t, next_t;
         int i;

         for ( i = mmesa->firstTexHeap ; i < mmesa->lastTexHeap ; i++ ) {
            foreach_s ( t, next_t, &mmesa->TexObjList[i] ) {
               mach64DestroyTexObj( mmesa, t );
            }
            mmDestroy( mmesa->texHeap[i] );
            mmesa->texHeap[i] = NULL;
         }

         foreach_s ( t, next_t, &mmesa->SwappedOut ) {
            mach64DestroyTexObj( mmesa, t );
         }
      }

      _swsetup_DestroyContext( mmesa->glCtx );
      _tnl_DestroyContext( mmesa->glCtx );
      _ac_DestroyContext( mmesa->glCtx );
      _swrast_DestroyContext( mmesa->glCtx );

      mach64FreeVB( mmesa->glCtx );

      /* Free the vertex buffer */
      if ( mmesa->vert_buf )
	 ALIGN_FREE( mmesa->vert_buf );
      
      /* free the Mesa context */
      mmesa->glCtx->DriverCtx = NULL;
      _mesa_destroy_context(mmesa->glCtx);

      FREE( mmesa );
   }
}

/* Force the context `c' to be the current context and associate with it
 * buffer `b'.
 */
GLboolean
mach64MakeCurrent( __DRIcontextPrivate *driContextPriv,
                 __DRIdrawablePrivate *driDrawPriv,
                 __DRIdrawablePrivate *driReadPriv )
{
   if ( driContextPriv ) {
      GET_CURRENT_CONTEXT(ctx);
      mach64ContextPtr oldMach64Ctx = ctx ? MACH64_CONTEXT(ctx) : NULL;
      mach64ContextPtr newMach64Ctx = (mach64ContextPtr) driContextPriv->driverPrivate;

      if ( newMach64Ctx != oldMach64Ctx ) {
	 newMach64Ctx->new_state |= MACH64_NEW_CONTEXT;
	 newMach64Ctx->dirty = MACH64_UPLOAD_ALL;
      }

      if ( newMach64Ctx->driDrawable != driDrawPriv ) {
	 newMach64Ctx->driDrawable = driDrawPriv;
	 mach64CalcViewport( newMach64Ctx->glCtx );
      }

      _mesa_make_current2( newMach64Ctx->glCtx,
                           (GLframebuffer *) driDrawPriv->driverPrivate,
                           (GLframebuffer *) driReadPriv->driverPrivate );


      newMach64Ctx->new_state |=  MACH64_NEW_CLIP;

      if ( !newMach64Ctx->glCtx->Viewport.Width ) {
	 _mesa_set_viewport(newMach64Ctx->glCtx, 0, 0,
                            driDrawPriv->w, driDrawPriv->h);
      }
   } else {
      _mesa_make_current( 0, 0 );
   }

   return GL_TRUE;
}


/* Force the context `c' to be unbound from its buffer.
 */
GLboolean
mach64UnbindContext( __DRIcontextPrivate *driContextPriv )
{
   return GL_TRUE;
}