i830_texmem.c   [plain text]

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

Copyright 2001 2d3d Inc., Delray Beach, FL

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/* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_texmem.c,v 1.5 2003/11/04 15:32:41 tsi Exp $ */

/*
 * Author:
 *   Jeff Hartmann <jhartmann@2d3d.com>
 *
 * Heavily based on the I810 driver, which was written by:
 *   Keith Whitwell <keithw@tungstengraphics.com>
 */

#include "glheader.h"
#include "macros.h"
#include "mtypes.h"
#include "simple_list.h"
#include "enums.h"
#include "texformat.h"

#include "i830_screen.h"
#include "i830_dri.h"

#include "i830_context.h"
#include "i830_tex.h"
#include "i830_state.h"
#include "i830_ioctl.h"


void i830DestroyTexObj(i830ContextPtr imesa, i830TextureObjectPtr t)
{
   unsigned   i;


   /* See if it was the driver's current object.
    */
   if ( imesa != NULL ) { 
      for ( i = 0 ; i < imesa->glCtx->Const.MaxTextureUnits ; i++ ) {
	 if ( t == imesa->CurrentTexObj[ i ] ) {
	    imesa->CurrentTexObj[ i ] = NULL;
	    imesa->dirty &= ~(I830_UPLOAD_TEX0 << i);
	 }
      }
   }
}

#if defined(i386) || defined(__i386__)
/* From linux kernel i386 header files, copes with odd sizes better
 * than COPY_DWORDS would:
 */
static __inline__ void * __memcpy(void * to, const void * from, size_t n)
{
int d0, d1, d2;
__asm__ __volatile__(
	"rep ; movsl\n\t"
	"testb $2,%b4\n\t"
	"je 1f\n\t"
	"movsw\n"
	"1:\ttestb $1,%b4\n\t"
	"je 2f\n\t"
	"movsb\n"
	"2:"
	: "=&c" (d0), "=&D" (d1), "=&S" (d2)
	:"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
	: "memory");
return (to);
}
#else
/* Allow compilation on other architectures */
#define __memcpy memcpy
#endif


/* Upload an image from mesa's internal copy.
 */
static void i830UploadTexLevel( i830ContextPtr imesa,
				i830TextureObjectPtr t, int hwlevel )
{
   const struct gl_texture_image *image = t->image[0][hwlevel].image;
   int j;

   if (!image || !image->Data)
      return;

   if (image->Width * image->TexFormat->TexelBytes == t->Pitch) {
	 GLubyte *dst = (GLubyte *)(t->BufAddr + t->image[0][hwlevel].offset);
	 GLubyte *src = (GLubyte *)image->Data;
	 
	 memcpy( dst, src, t->Pitch * image->Height );
   }
   else switch (image->TexFormat->TexelBytes) {
   case 1:
      {
	 GLubyte *dst = (GLubyte *)(t->BufAddr + t->image[0][hwlevel].offset);
	 GLubyte *src = (GLubyte *)image->Data;

	 for (j = 0 ; j < image->Height ; j++, dst += t->Pitch) {
	    __memcpy(dst, src, image->Width );
	    src += image->Width;
	 }
      }
      break;

   case 2:
      {
	 GLushort *dst = (GLushort *)(t->BufAddr + t->image[0][hwlevel].offset);
	 GLushort *src = (GLushort *)image->Data;

	 for (j = 0 ; j < image->Height ; j++, dst += (t->Pitch/2)) {
	    __memcpy(dst, src, image->Width * 2 );
	    src += image->Width;
	 }
      }
      break;

   case 4:
      {
	 GLuint *dst = (GLuint *)(t->BufAddr + t->image[0][hwlevel].offset);
	 GLuint *src = (GLuint *)image->Data;

	 for (j = 0 ; j < image->Height ; j++, dst += (t->Pitch/4)) {
	    __memcpy(dst, src, image->Width * 4 );
	    src += image->Width;
	 }
      }
      break;

   default:
      fprintf(stderr, "%s: Not supported texel size %d\n",
	      __FUNCTION__, image->TexFormat->TexelBytes);
   }
}


/* This is called with the lock held.  May have to eject our own and/or
 * other client's texture objects to make room for the upload.
 */

int i830UploadTexImagesLocked( i830ContextPtr imesa, i830TextureObjectPtr t )
{
   int ofs;

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

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

      /* Set the base offset of the texture image */
      ofs = t->base.memBlock->ofs;
      t->BufAddr = imesa->i830Screen->tex.map + ofs;
      t->Setup[I830_TEXREG_TM0S0] = (TM0S0_USE_FENCE |
				     (imesa->i830Screen->textureOffset + ofs));

      if (t == imesa->CurrentTexObj[0])
	 imesa->dirty |= I830_UPLOAD_TEX0;

      if (t == imesa->CurrentTexObj[1])
	 imesa->dirty |= I830_UPLOAD_TEX1;
#if 0
      if (t == imesa->CurrentTexObj[2])
	 I830_STATECHANGE(imesa, I830_UPLOAD_TEX2);

      if (t == imesa->CurrentTexObj[3])
	 I830_STATECHANGE(imesa, I830_UPLOAD_TEX3);
#endif
   }


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

   if (imesa->texture_heaps[0]->timestamp >= GET_DISPATCH_AGE(imesa)) 
      i830WaitAgeLocked( imesa, imesa->texture_heaps[0]->timestamp ); 

   /* Upload any images that are new */
   if (t->base.dirty_images[0]) {
      int i;
      const int numLevels = t->base.lastLevel - t->base.firstLevel + 1;

      for (i = 0 ; i < numLevels ; i++) { 
         if ( (t->base.dirty_images[0] & (1 << (i+t->base.firstLevel))) != 0 ) {
	    i830UploadTexLevel( imesa, t, i );
         }
      }
      t->base.dirty_images[0] = 0;
      imesa->sarea->perf_boxes |= I830_BOX_TEXTURE_LOAD;
   }

   return 0;
}