src/mesa/drivers/dri/intel/intel_tex.c

   1 #include "swrast/swrast.h"
   2 #include "main/texobj.h"
   3 #include "main/teximage.h"
   4 #include "main/mipmap.h"
   5 #include "drivers/common/meta.h"
   6 #include "intel_context.h"
   7 #include "intel_mipmap_tree.h"
   8 #include "intel_tex.h"
   9
  10 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  11
  12 static GLboolean
  13 intelIsTextureResident(GLcontext * ctx, struct gl_texture_object *texObj)
  14 {
  15 #if 0
  16    struct intel_context *intel = intel_context(ctx);
  17    struct intel_texture_object *intelObj = intel_texture_object(texObj);
  18
  19    return
  20       intelObj->mt &&
  21       intelObj->mt->region &&
  22       intel_is_region_resident(intel, intelObj->mt->region);
  23 #endif
  24    return 1;
  25 }
  26
  27
  28
  29 static struct gl_texture_image *
  30 intelNewTextureImage(GLcontext * ctx)
  31 {
  32    DBG("%s\n", __FUNCTION__);
  33    (void) ctx;
  34    return (struct gl_texture_image *) CALLOC_STRUCT(intel_texture_image);
  35 }
  36
  37
  38 static struct gl_texture_object *
  39 intelNewTextureObject(GLcontext * ctx, GLuint name, GLenum target)
  40 {
  41    struct intel_texture_object *obj = CALLOC_STRUCT(intel_texture_object);
  42
  43    DBG("%s\n", __FUNCTION__);
  44    _mesa_initialize_texture_object(&obj->base, name, target);
  45
  46    return &obj->base;
  47 }
  48
  49 static void
  50 intelDeleteTextureObject(GLcontext *ctx,
  51                          struct gl_texture_object *texObj)
  52 {
  53    struct intel_context *intel = intel_context(ctx);
  54    struct intel_texture_object *intelObj = intel_texture_object(texObj);
  55
  56    if (intelObj->mt)
  57       intel_miptree_release(intel, &intelObj->mt);
  58
  59    _mesa_delete_texture_object(ctx, texObj);
  60 }
  61
  62
  63 static void
  64 intelFreeTextureImageData(GLcontext * ctx, struct gl_texture_image *texImage)
  65 {
  66    struct intel_context *intel = intel_context(ctx);
  67    struct intel_texture_image *intelImage = intel_texture_image(texImage);
  68
  69    DBG("%s\n", __FUNCTION__);
  70
  71    if (intelImage->mt) {
  72       intel_miptree_release(intel, &intelImage->mt);
  73    }
  74
  75    if (texImage->Data) {
  76       _mesa_free_texmemory(texImage->Data);
  77       texImage->Data = NULL;
  78    }
  79 }
  80
  81
  82 /* The system memcpy (at least on ubuntu 5.10) has problems copying
  83  * to agp (writecombined) memory from a source which isn't 64-byte
  84  * aligned - there is a 4x performance falloff.
  85  *
  86  * The x86 __memcpy is immune to this but is slightly slower
  87  * (10%-ish) than the system memcpy.
  88  *
  89  * The sse_memcpy seems to have a slight cliff at 64/32 bytes, but
  90  * isn't much faster than x86_memcpy for agp copies.
  91  *
  92  * TODO: switch dynamically.
  93  */
  94 static void *
  95 do_memcpy(void *dest, const void *src, size_t n)
  96 {
  97    if ((((unsigned long) src) & 63) || (((unsigned long) dest) & 63)) {
  98       return __memcpy(dest, src, n);
  99    }
 100    else
 101       return memcpy(dest, src, n);
 102 }
 103
 104
 105 #if DO_DEBUG && !defined(__ia64__)
 106
 107 #ifndef __x86_64__
 108 static unsigned
 109 fastrdtsc(void)
 110 {
 111    unsigned eax;
 112    __asm__ volatile ("\t"
 113                      "pushl  %%ebx\n\t"
 114                      "cpuid\n\t" ".byte 0x0f, 0x31\n\t"
 115                      "popl %%ebx\n":"=a" (eax)
 116                      :"0"(0)
 117                      :"ecx", "edx", "cc");
 118
 119    return eax;
 120 }
 121 #else
 122 static unsigned
 123 fastrdtsc(void)
 124 {
 125    unsigned eax;
 126    __asm__ volatile ("\t" "cpuid\n\t" ".byte 0x0f, 0x31\n\t":"=a" (eax)
 127                      :"0"(0)
 128                      :"ecx", "edx", "ebx", "cc");
 129
 130    return eax;
 131 }
 132 #endif
 133
 134 static unsigned
 135 time_diff(unsigned t, unsigned t2)
 136 {
 137    return ((t < t2) ? t2 - t : 0xFFFFFFFFU - (t - t2 - 1));
 138 }
 139
 140
 141 static void *
 142 timed_memcpy(void *dest, const void *src, size_t n)
 143 {
 144    void *ret;
 145    unsigned t1, t2;
 146    double rate;
 147
 148    if ((((unsigned) src) & 63) || (((unsigned) dest) & 63))
 149       _mesa_printf("Warning - non-aligned texture copy!\n");
 150
 151    t1 = fastrdtsc();
 152    ret = do_memcpy(dest, src, n);
 153    t2 = fastrdtsc();
 154
 155    rate = time_diff(t1, t2);
 156    rate /= (double) n;
 157    _mesa_printf("timed_memcpy: %u %u --> %f clocks/byte\n", t1, t2, rate);
 158    return ret;
 159 }
 160 #endif /* DO_DEBUG */
 161
 162
 163 /**
 164  * Called via ctx->Driver.GenerateMipmap()
 165  * This is basically a wrapper for _mesa_meta_GenerateMipmap() which checks
 166  * if we'll be using software mipmap generation.  In that case, we need to
 167  * map/unmap the base level texture image.
 168  */
 169 static void
 170 intelGenerateMipmap(GLcontext *ctx, GLenum target,
 171                     struct gl_texture_object *texObj)
 172 {
 173    if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
 174       /* sw path: need to map texture images */
 175       struct intel_context *intel = intel_context(ctx);
 176       struct intel_texture_object *intelObj = intel_texture_object(texObj);
 177       intel_tex_map_level_images(intel, intelObj, texObj->BaseLevel);
 178       _mesa_generate_mipmap(ctx, target, texObj);
 179       intel_tex_unmap_level_images(intel, intelObj, texObj->BaseLevel);
 180    }
 181    else {
 182       _mesa_meta_GenerateMipmap(ctx, target, texObj);
 183    }
 184 }
 185
 186
 187 void
 188 intelInitTextureFuncs(struct dd_function_table *functions)
 189 {
 190    functions->ChooseTextureFormat = intelChooseTextureFormat;
 191    functions->GenerateMipmap = intelGenerateMipmap;
 192
 193    functions->NewTextureObject = intelNewTextureObject;
 194    functions->NewTextureImage = intelNewTextureImage;
 195    functions->DeleteTexture = intelDeleteTextureObject;
 196    functions->FreeTexImageData = intelFreeTextureImageData;
 197    functions->UpdateTexturePalette = 0;
 198    functions->IsTextureResident = intelIsTextureResident;
 199
 200 #if DO_DEBUG && !defined(__ia64__)
 201    if (INTEL_DEBUG & DEBUG_BUFMGR)
 202       functions->TextureMemCpy = timed_memcpy;
 203    else
 204 #endif
 205       functions->TextureMemCpy = do_memcpy;
 206 }