path: root/src/mesa/drivers/dri/r128/r128_texmem.c

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

Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
                                               Cedar Park, Texas.
All Rights Reserved.

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

/*
 * Authors:
 *   Gareth Hughes <gareth@valinux.com>
 *   Kevin E. Martin <martin@valinux.com>
 *   Brian Paul <brianp@valinux.com>
 */

#include "r128_context.h"
#include "r128_state.h"
#include "r128_ioctl.h"
#include "r128_tris.h"
#include "r128_tex.h"

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

#define TEX_0	1
#define TEX_1	2


/* Destroy hardware state associated with texture `t'.
 */
void r128DestroyTexObj( r128ContextPtr rmesa, r128TexObjPtr t )
{
    unsigned   i;


    /* See if it was the driver's current object.
     */

    if ( rmesa != NULL )
    { 
	for ( i = 0 ; i < rmesa->glCtx->Const.MaxTextureUnits ; i++ )
	{
	    if ( t == rmesa->CurrentTexObj[ i ] ) {
		assert( t->base.bound & (1 << i) );
		rmesa->CurrentTexObj[ i ] = NULL;
	    }
	}
    }
}


/**
 * Upload the texture image associated with texture \a t at the specified
 * level at the address relative to \a start.
 */
static void uploadSubImage( r128ContextPtr rmesa, r128TexObjPtr t,
			    GLint level,
			    GLint x, GLint y, GLint width, GLint height )
{
   struct gl_texture_image *image;
   int texelsPerDword = 0;
   int imageWidth, imageHeight;
   int remaining, rows;
   int format, dwords;
   uint32_t pitch, offset;
   int i;

   /* Ensure we have a valid texture to upload */
   if ( ( level < 0 ) || ( level > R128_MAX_TEXTURE_LEVELS ) )
      return;

   image = t->base.tObj->Image[0][level];
   if ( !image )
      return;

   switch ( _mesa_get_format_bytes(image->TexFormat) ) {
   case 1: texelsPerDword = 4; break;
   case 2: texelsPerDword = 2; break;
   case 4: texelsPerDword = 1; break;
   }

#if 1
   /* FIXME: The subimage index calcs are wrong... */
   x = 0;
   y = 0;
   width = image->Width;
   height = image->Height;
#endif

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

   format = t->textureFormat >> 16;

   /* The texel upload routines have a minimum width, so force the size
    * if needed.
    */
   if ( imageWidth < texelsPerDword ) {
      int factor;

      factor = texelsPerDword / imageWidth;
      imageWidth = texelsPerDword;
      imageHeight /= factor;
      if ( imageHeight == 0 ) {
	 /* In this case, the texel converter will actually walk a
	  * texel or two off the end of the image, but normal malloc
	  * alignment should prevent it from ever causing a fault.
	  */
	 imageHeight = 1;
      }
   }

   /* We can't upload to a pitch less than 8 texels so we will need to
    * linearly upload all modified rows for textures smaller than this.
    * This makes the x/y/width/height different for the blitter and the
    * texture walker.
    */
   if ( imageWidth >= 8 ) {
      /* The texture walker and the blitter look identical */
      pitch = imageWidth >> 3;
   } else {
      int factor;
      int y2;
      int start, end;

      start = (y * imageWidth) & ~7;
      end = (y + height) * imageWidth;

      if ( end - start < 8 ) {
	 /* Handle the case where the total number of texels
	  * uploaded is < 8.
	  */
	 x = 0;
	 y = start / 8;
	 width = end - start;
	 height = 1;
      } else {
	 /* Upload some number of full 8 texel blit rows */
	 factor = 8 / imageWidth;

	 y2 = y + height - 1;
	 y /= factor;
	 y2 /= factor;

	 x = 0;
	 width = 8;
	 height = y2 - y + 1;
      }

      /* Fixed pitch of 8 */
      pitch = 1;
   }

   dwords = width * height / texelsPerDword;
   offset = t->bufAddr + t->image[level - t->base.firstLevel].offset;

#if ENABLE_PERF_BOXES
   /* Bump the performace counter */
   rmesa->c_textureBytes += (dwords << 2);
#endif

   if ( R128_DEBUG & DEBUG_VERBOSE_API ) {
      fprintf( stderr, "r128UploadSubImage: %d,%d of %d,%d at %d,%d\n",
	       width, height, image->Width, image->Height, x, y );
      fprintf( stderr, "          blit ofs: 0x%07x pitch: 0x%x dwords: %d "
	       "level: %d format: %x\n",
	       (GLuint)offset, (GLuint)pitch, dwords, level, format );
   }

   /* Subdivide the texture if required */
   if ( dwords <= R128_BUFFER_MAX_DWORDS / 2 ) {
      rows = height;
   } else {
      rows = (R128_BUFFER_MAX_DWORDS * texelsPerDword) / (2 * width);
   }

   for ( i = 0, remaining = height ;
	 remaining > 0 ;
	 remaining -= rows, y += rows, i++ )
   {
      uint32_t *dst;
      drmBufPtr buffer;

      assert(image->Data);

      height = MIN2(remaining, rows);

      /* Grab the indirect buffer for the texture blit */
      LOCK_HARDWARE( rmesa );
      buffer = r128GetBufferLocked( rmesa );

      dst = (uint32_t *)((char *)buffer->address + R128_HOSTDATA_BLIT_OFFSET);

      /* Copy the next chunck of the texture image into the blit buffer */
      {
         const GLuint texelBytes =
            _mesa_get_format_bytes(image->TexFormat);
         const GLubyte *src = (const GLubyte *) image->Data +
            (y * image->Width + x) * texelBytes;            
         const GLuint bytes = width * height * texelBytes;
         memcpy(dst, src, bytes);
      }

      r128FireBlitLocked( rmesa, buffer,
			  offset, pitch, format,
			  x, y, width, height );
      UNLOCK_HARDWARE( rmesa );
   }

   rmesa->new_state |= R128_NEW_CONTEXT;
   rmesa->dirty |= R128_UPLOAD_CONTEXT | R128_UPLOAD_MASKS;
}


/* Upload the texture images associated with texture `t'.  This might
 * require removing our own and/or other client's texture objects to
 * make room for these images.
 */
void r128UploadTexImages( r128ContextPtr rmesa, r128TexObjPtr t )
{
   const GLint numLevels = t->base.lastLevel - t->base.firstLevel + 1;
   GLint i;

   if ( R128_DEBUG & DEBUG_VERBOSE_API ) {
      fprintf( stderr, "%s( %p, %p )\n",
	       __FUNCTION__, (void *) rmesa->glCtx, (void *) t );
   }

   assert(t);

   LOCK_HARDWARE( rmesa );

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


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

      /* Set the base offset of the texture image */
      t->bufAddr = rmesa->r128Screen->texOffset[heap] 
	   + t->base.memBlock->ofs;

      /* Set texture offsets for each mipmap level */
      if ( t->setup.tex_cntl & R128_MIP_MAP_DISABLE ) {
	 for ( i = 0 ; i < R128_MAX_TEXTURE_LEVELS ; i++ ) {
	    t->setup.tex_offset[i] = t->bufAddr;
	 }
      } else {
         for ( i = 0; i < numLevels; i++ ) {
            const int j = numLevels - i - 1;
            t->setup.tex_offset[j] = t->bufAddr + t->image[i].offset;
         }
      }
   }

   /* 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[0] ) {
      for ( i = 0 ; i < numLevels; i++ ) {
         const GLint j = t->base.firstLevel + i;  /* the texObj's level */
	 if ( t->base.dirty_images[0] & (1 << j) ) {
	    uploadSubImage( rmesa, t, j, 0, 0,
			    t->image[i].width, t->image[i].height );
	 }
      }

      rmesa->setup.tex_cntl_c |= R128_TEX_CACHE_FLUSH;
      rmesa->dirty |= R128_UPLOAD_CONTEXT;
      t->base.dirty_images[0] = 0;
   }
}