src/mesa/drivers/dri/i810/i810texmem.c

   1 /*
   2  * GLX Hardware Device Driver for Intel i810
   3  * Copyright (C) 1999 Keith Whitwell
   4  * Texmem interface changes (C) 2003 Dave Airlie
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
  22  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  */
  25
  26 #include "main/glheader.h"
  27 #include "main/macros.h"
  28 #include "main/mtypes.h"
  29 #include "main/simple_list.h"
  30 #include "main/enums.h"
  31 #include "main/colormac.h"
  32 #include "main/mm.h"
  33
  34 #include "i810screen.h"
  35 #include "i810_dri.h"
  36 #include "i810context.h"
  37 #include "i810tex.h"
  38 #include "i810ioctl.h"
  39
  40
  41 void i810DestroyTexObj(i810ContextPtr imesa, i810TextureObjectPtr t)
  42 {
  43    /* See if it was the driver's current object.
  44     */
  45    if ( imesa != NULL ) {
  46      if (imesa->CurrentTexObj[0] == t) {
  47        imesa->CurrentTexObj[0] = 0;
  48        imesa->dirty &= ~I810_UPLOAD_TEX0;
  49      }
  50
  51      if (imesa->CurrentTexObj[1] == t) {
  52        imesa->CurrentTexObj[1] = 0;
  53        imesa->dirty &= ~I810_UPLOAD_TEX1;
  54      }
  55    }
  56 }
  57
  58
  59
  60 #if defined(i386) || defined(__i386__)
  61 /* From linux kernel i386 header files, copes with odd sizes better
  62  * than COPY_DWORDS would:
  63  */
  64 static INLINE void * __memcpy(void * to, const void * from, size_t n)
  65 {
  66 int d0, d1, d2;
  67 __asm__ __volatile__(
  68         "rep ; movsl\n\t"
  69         "testb $2,%b4\n\t"
  70         "je 1f\n\t"
  71         "movsw\n"
  72         "1:\ttestb $1,%b4\n\t"
  73         "je 2f\n\t"
  74         "movsb\n"
  75         "2:"
  76         : "=&c" (d0), "=&D" (d1), "=&S" (d2)
  77         :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
  78         : "memory");
  79 return (to);
  80 }
  81 #else
  82 /* Allow compilation on other architectures */
  83 #define __memcpy memcpy
  84 #endif
  85
  86 /* Upload an image from mesa's internal copy.
  87  */
  88 static void i810UploadTexLevel( i810ContextPtr imesa,
  89                                 i810TextureObjectPtr t, int hwlevel )
  90 {
  91    const struct gl_texture_image *image = t->image[hwlevel].image;
  92    int j;
  93    GLuint texelBytes;
  94
  95    if (!image || !image->Data)
  96       return;
  97
  98    texelBytes = _mesa_get_format_bytes(image->TexFormat);
  99
 100    if (image->Width * texelBytes == t->Pitch) {
 101          GLubyte *dst = (GLubyte *)(t->BufAddr + t->image[hwlevel].offset);
 102          GLubyte *src = (GLubyte *)image->Data;
 103
 104          memcpy( dst, src, t->Pitch * image->Height );
 105    }
 106    else {
 107       switch (texelBytes) {
 108       case 1:
 109          {
 110             GLubyte *dst = (GLubyte *)(t->BufAddr + t->image[hwlevel].offset);
 111             GLubyte *src = (GLubyte *)image->Data;
 112
 113             for (j = 0 ; j < image->Height ; j++, dst += t->Pitch) {
 114                __memcpy(dst, src, image->Width );
 115                src += image->Width;
 116             }
 117          }
 118          break;
 119       case 2:
 120          {
 121             GLushort *dst = (GLushort *)(t->BufAddr + t->image[hwlevel].offset);
 122             GLushort *src = (GLushort *)image->Data;
 123
 124             for (j = 0 ; j < image->Height ; j++, dst += (t->Pitch/2)) {
 125                __memcpy(dst, src, image->Width * 2 );
 126                src += image->Width;
 127             }
 128          }
 129          break;
 130       default:
 131          fprintf(stderr, "%s: Not supported texel size %d\n",
 132                  __FUNCTION__, texelBytes);
 133       }
 134    }
 135 }
 136
 137 /* This is called with the lock held.  May have to eject our own and/or
 138  * other client's texture objects to make room for the upload.
 139  */
 140 int i810UploadTexImagesLocked( i810ContextPtr imesa, i810TextureObjectPtr t )
 141 {
 142    int i;
 143    int ofs;
 144    int numLevels;
 145
 146    /* Do we need to eject LRU texture objects?
 147     */
 148    if (!t->base.memBlock) {
 149       int heap;
 150
 151       heap = driAllocateTexture( imesa->texture_heaps, imesa->nr_heaps,
 152                                  (driTextureObject *) t);
 153
 154       if ( heap == -1 ) {
 155         return -1;
 156       }
 157
 158       ofs = t->base.memBlock->ofs;
 159       t->BufAddr = imesa->i810Screen->tex.map + ofs;
 160       t->Setup[I810_TEXREG_MI3] = imesa->i810Screen->textureOffset + ofs;
 161
 162       if (t == imesa->CurrentTexObj[0])
 163         I810_STATECHANGE(imesa, I810_UPLOAD_TEX0);
 164
 165       if (t == imesa->CurrentTexObj[1])
 166          I810_STATECHANGE(imesa, I810_UPLOAD_TEX1);
 167
 168        /*      i810UpdateTexLRU( imesa, t );*/
 169      }
 170    driUpdateTextureLRU( (driTextureObject *) t );
 171
 172    if (imesa->texture_heaps[0]->timestamp >= GET_DISPATCH_AGE(imesa))
 173       i810WaitAgeLocked( imesa, imesa->texture_heaps[0]->timestamp );
 174
 175    numLevels = t->base.lastLevel - t->base.firstLevel + 1;
 176    for (i = 0 ; i < numLevels ; i++)
 177       if (t->base.dirty_images[0] & (1<<i))
 178          i810UploadTexLevel( imesa, t, i );
 179
 180    t->base.dirty_images[0] = 0;
 181
 182    return 0;
 183 }