/**************************************************************************

Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
                     VA Linux Systems Inc., Fremont, California.

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 on the rights to use, copy, modify, merge, publish,
distribute, sub license, 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
NON-INFRINGEMENT. IN NO EVENT SHALL ATI, VA LINUX SYSTEMS AND/OR THEIR
SUPPLIERS 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:
 *   Kevin E. Martin <martin@valinux.com>
 *   Gareth Hughes <gareth@valinux.com>
 *
 */
#include <errno.h> 

#include "main/glheader.h"
#include "main/imports.h"
#include "main/context.h"
#include "main/macros.h"

#include "radeon_context.h"
#include "radeon_ioctl.h"
#include "radeon_tex.h"

#include <unistd.h>  /* for usleep() */


/**
 * Destroy any device-dependent state associated with the texture.  This may
 * include NULLing out hardware state that points to the texture.
 */
void
radeonDestroyTexObj( radeonContextPtr rmesa, radeonTexObjPtr t )
{
   if ( RADEON_DEBUG & DEBUG_TEXTURE ) {
      fprintf( stderr, "%s( %p, %p )\n", __FUNCTION__, (void *)t, (void *)t->base.tObj );
   }

   if ( rmesa != NULL ) {
      unsigned   i;


      for ( i = 0 ; i < rmesa->glCtx->Const.MaxTextureUnits ; i++ ) {
	 if ( t == rmesa->state.texture.unit[i].texobj ) {
	    rmesa->state.texture.unit[i].texobj = NULL;
	 }
      }
   }
}


/* ------------------------------------------------------------
 * Texture image conversions
 */


static void radeonUploadRectSubImage( radeonContextPtr rmesa,
				      radeonTexObjPtr t, 
				      struct gl_texture_image *texImage,
				      GLint x, GLint y, 
				      GLint width, GLint height )
{
   const struct gl_texture_format *texFormat = texImage->TexFormat;
   int blit_format, dstPitch, done;

   switch ( texFormat->TexelBytes ) {
   case 1:
      blit_format = RADEON_GMC_DST_8BPP_CI;
      break;
   case 2:
      blit_format = RADEON_GMC_DST_16BPP;
      break;
   case 4:
      blit_format = RADEON_GMC_DST_32BPP;
      break;
   default:
      fprintf( stderr, "radeonUploadRectSubImage: unknown blit_format (texelbytes=%d)\n", 
      	       texFormat->TexelBytes);
      return;
   }

   t->image[0][0].data = texImage->Data;

   /* Currently don't need to cope with small pitches.
    */
   width = texImage->Width;
   height = texImage->Height;
   dstPitch = t->pp_txpitch + 32;

   {	/* FIXME: prefer GART-texturing if possible */
      /* Data not in GART memory, or bad pitch.
       */
      for (done = 0; done < height ; ) {
	 struct radeon_dma_region region;
	 int lines = MIN2( height - done, RADEON_BUFFER_SIZE / dstPitch );
	 int src_pitch;
	 char *tex;

         src_pitch = texImage->RowStride * texFormat->TexelBytes;

	 tex = (char *)texImage->Data + done * src_pitch;

	 memset(&region, 0, sizeof(region));
	 radeonAllocDmaRegion( rmesa, &region, lines * dstPitch, 1024 );

	 /* Copy texdata to dma:
	  */
	 if (0)
	    fprintf(stderr, "%s: src_pitch %d dst_pitch %d\n",
		    __FUNCTION__, src_pitch, dstPitch);

	 if (src_pitch == dstPitch) {
	    memcpy( region.address + region.start, tex, lines * src_pitch );
	 } 
	 else {
	    char *buf = region.address + region.start;
	    int i;
	    for (i = 0 ; i < lines ; i++) {
	       memcpy( buf, tex, src_pitch );
	       buf += dstPitch;
	       tex += src_pitch;
	    }
	 }

	 radeonEmitWait( rmesa, RADEON_WAIT_3D );

	 

	 /* Blit to framebuffer
	  */
	 radeonEmitBlit( rmesa,
		       blit_format,
		       dstPitch, GET_START( &region ),
		       dstPitch, t->bufAddr,
		       0, 0,
		       0, done,
		       width, lines );
	 
	 radeonEmitWait( rmesa, RADEON_WAIT_2D );

	 radeonReleaseDmaRegion( rmesa, &region, __FUNCTION__ );
	 done += lines;
      }
   }
}


/**
 * Upload the texture image associated with texture \a t at the specified
 * level at the address relative to \a start.
 */
static void uploadSubImage( radeonContextPtr rmesa, radeonTexObjPtr t, 
			    GLint hwlevel,
			    GLint x, GLint y, GLint width, GLint height,
			    GLuint face )
{
   struct gl_texture_image *texImage = NULL;
   GLuint offset;
   GLint imageWidth, imageHeight;
   GLint ret;
   drm_radeon_texture_t tex;
   drm_radeon_tex_image_t tmp;
   const int level = hwlevel + t->base.firstLevel;

   if ( RADEON_DEBUG & DEBUG_TEXTURE ) {
      fprintf( stderr, "%s( %p, %p ) level/width/height/face = %d/%d/%d/%u\n", 
	       __FUNCTION__, (void *)t, (void *)t->base.tObj, level, width, height, face );
   }

   ASSERT(face < 6);

   /* Ensure we have a valid texture to upload */
   if ( ( hwlevel < 0 ) || ( hwlevel >= RADEON_MAX_TEXTURE_LEVELS ) ) {
      _mesa_problem(NULL, "bad texture level in %s", __FUNCTION__);
      return;
   }

   texImage = t->base.tObj->Image[face][level];

   if ( !texImage ) {
      if ( RADEON_DEBUG & DEBUG_TEXTURE )
	 fprintf( stderr, "%s: texImage %d is NULL!\n", __FUNCTION__, level );
      return;
   }
   if ( !texImage->Data ) {
      if ( RADEON_DEBUG & DEBUG_TEXTURE )
	 fprintf( stderr, "%s: image data is NULL!\n", __FUNCTION__ );
      return;
   }


   if (t->base.tObj->Target == GL_TEXTURE_RECTANGLE_NV) {
      assert(level == 0);
      assert(hwlevel == 0);
      if ( RADEON_DEBUG & DEBUG_TEXTURE )
	 fprintf( stderr, "%s: image data is rectangular\n", __FUNCTION__);
      radeonUploadRectSubImage( rmesa, t, texImage, x, y, width, height );
      return;
   }

   imageWidth = texImage->Width;
   imageHeight = texImage->Height;

   offset = t->bufAddr + t->base.totalSize * face / 6;

   if ( RADEON_DEBUG & (DEBUG_TEXTURE|DEBUG_IOCTL) ) {
      GLint imageX = 0;
      GLint imageY = 0;
      GLint blitX = t->image[face][hwlevel].x;
      GLint blitY = t->image[face][hwlevel].y;
      GLint blitWidth = t->image[face][hwlevel].width;
      GLint blitHeight = t->image[face][hwlevel].height;
      fprintf( stderr, "   upload image: %d,%d at %d,%d\n",
	       imageWidth, imageHeight, imageX, imageY );
      fprintf( stderr, "   upload  blit: %d,%d at %d,%d\n",
	       blitWidth, blitHeight, blitX, blitY );
      fprintf( stderr, "       blit ofs: 0x%07x level: %d/%d\n",
	       (GLuint)offset, hwlevel, level );
   }

   t->image[face][hwlevel].data = texImage->Data;

   /* Init the DRM_RADEON_TEXTURE command / drm_radeon_texture_t struct.
    * NOTE: we're always use a 1KB-wide blit and I8 texture format.
    * We used to use 1, 2 and 4-byte texels and used to use the texture
    * width to dictate the blit width - but that won't work for compressed
    * textures. (Brian)
    * NOTE: can't do that with texture tiling. (sroland)
    */
   tex.offset = offset;
   tex.image = &tmp;
   /* copy (x,y,width,height,data) */
   memcpy( &tmp, &t->image[face][hwlevel], sizeof(drm_radeon_tex_image_t) );

   if (texImage->TexFormat->TexelBytes) {
      /* use multi-byte upload scheme */
      tex.height = imageHeight;
      tex.width = imageWidth;
      tex.format = t->pp_txformat & RADEON_TXFORMAT_FORMAT_MASK;
      tex.pitch = MAX2((texImage->Width * texImage->TexFormat->TexelBytes) / 64, 1);
      tex.offset += tmp.x & ~1023;
      tmp.x = tmp.x % 1024;
      if (t->tile_bits & RADEON_TXO_MICRO_TILE_X2) {
	 /* need something like "tiled coordinates" ? */
	 tmp.y = tmp.x / (tex.pitch * 128) * 2;
	 tmp.x = tmp.x % (tex.pitch * 128) / 2 / texImage->TexFormat->TexelBytes;
	 tex.pitch |= RADEON_DST_TILE_MICRO >> 22;
      }
      else {
	 tmp.x = tmp.x >> (texImage->TexFormat->TexelBytes >> 1);
      }
      if ((t->tile_bits & RADEON_TXO_MACRO_TILE) &&
	 (texImage->Width * texImage->TexFormat->TexelBytes >= 256)) {
	 /* radeon switches off macro tiling for small textures/mipmaps it seems */
	 tex.pitch |= RADEON_DST_TILE_MACRO >> 22;
      }
   }
   else {
      /* In case of for instance 8x8 texture (2x2 dxt blocks), padding after the first two blocks is
         needed (only with dxt1 since 2 dxt3/dxt5 blocks already use 32 Byte). */
      /* set tex.height to 1/4 since 1 "macropixel" (dxt-block) has 4 real pixels. Needed
         so the kernel module reads the right amount of data. */
      tex.format = RADEON_TXFORMAT_I8; /* any 1-byte texel format */
      tex.pitch = (BLIT_WIDTH_BYTES / 64);
      tex.height = (imageHeight + 3) / 4;
      tex.width = (imageWidth + 3) / 4;
      switch (t->pp_txformat & RADEON_TXFORMAT_FORMAT_MASK) {
      case RADEON_TXFORMAT_DXT1:
         tex.width *= 8;
         break;
      case RADEON_TXFORMAT_DXT23:
      case RADEON_TXFORMAT_DXT45:
         tex.width *= 16;
         break;
      }
   }

   LOCK_HARDWARE( rmesa );
   do {
      ret = drmCommandWriteRead( rmesa->dri.fd, DRM_RADEON_TEXTURE,
                                 &tex, sizeof(drm_radeon_texture_t) );
   } while ( ret == -EAGAIN );

   UNLOCK_HARDWARE( rmesa );

   if ( ret ) {
      fprintf( stderr, "DRM_RADEON_TEXTURE: return = %d\n", ret );
      fprintf( stderr, "   offset=0x%08x\n",
	       offset );
      fprintf( stderr, "   image width=%d height=%d\n",
	       imageWidth, imageHeight );
      fprintf( stderr, "    blit width=%d height=%d data=%p\n",
	       t->image[face][hwlevel].width, t->image[face][hwlevel].height,
	       t->image[face][hwlevel].data );
      exit( 1 );
   }
}


/**
 * Upload the texture images associated with texture \a t.  This might
 * require the allocation of texture memory.
 * 
 * \param rmesa Context pointer
 * \param t Texture to be uploaded
 * \param face Cube map face to be uploaded.  Zero for non-cube maps.
 */

int radeonUploadTexImages( radeonContextPtr rmesa, radeonTexObjPtr t, GLuint face )
{
   int numLevels;

   if ( !t || t->base.totalSize == 0 || t->image_override )
      return 0;

   if ( RADEON_DEBUG & (DEBUG_TEXTURE|DEBUG_IOCTL) ) {
      fprintf( stderr, "%s( %p, %p ) sz=%d lvls=%d-%d\n", __FUNCTION__,
	       (void *)rmesa->glCtx, (void *)t->base.tObj, t->base.totalSize,
	       t->base.firstLevel, t->base.lastLevel );
   }

   numLevels = t->base.lastLevel - t->base.firstLevel + 1;

   if (RADEON_DEBUG & DEBUG_SYNC) {
      fprintf(stderr, "%s: Syncing\n", __FUNCTION__ );
      radeonFinish( rmesa->glCtx );
   }

   LOCK_HARDWARE( rmesa );

   if ( t->base.memBlock == NULL ) {
      int heap;

      heap = driAllocateTexture( rmesa->texture_heaps, rmesa->nr_heaps,
				 (driTextureObject *) t );
      if ( heap == -1 ) {
	 UNLOCK_HARDWARE( rmesa );
	 return -1;
      }

      /* Set the base offset of the texture image */
      t->bufAddr = rmesa->radeonScreen->texOffset[heap] 
	   + t->base.memBlock->ofs;
      t->pp_txoffset = t->bufAddr;

      if (!(t->base.tObj->Image[0][0]->IsClientData)) {
	 /* hope it's safe to add that here... */
	 t->pp_txoffset |= t->tile_bits;
      }

      /* Mark this texobj as dirty on all units:
       */
      t->dirty_state = TEX_ALL;
   }


   /* Let the world know we've used this memory recently.
    */
   driUpdateTextureLRU( (driTextureObject *) t );
   UNLOCK_HARDWARE( rmesa );


   /* Upload any images that are new */
   if (t->base.dirty_images[face]) {
      int i;
      for ( i = 0 ; i < numLevels ; i++ ) {
         if ( (t->base.dirty_images[face] & (1 << (i+t->base.firstLevel))) != 0 ) {
            uploadSubImage( rmesa, t, i, 0, 0, t->image[face][i].width,
			    t->image[face][i].height, face );
         }
      }
      t->base.dirty_images[face] = 0;
   }

   if (RADEON_DEBUG & DEBUG_SYNC) {
      fprintf(stderr, "%s: Syncing\n", __FUNCTION__ );
      radeonFinish( rmesa->glCtx );
   }

   return 0;
}
