intel_tex.c revision 7d4b348c67dbc2eff1d7dd0c043a76bc0eae57ab 
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
12static GLboolean
13intelIsTextureResident(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
29static struct gl_texture_image *
30intelNewTextureImage(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
38static struct gl_texture_object *
39intelNewTextureObject(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
49static void
50intelDeleteTextureObject(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
63static void
64intelFreeTextureImageData(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 */
94static void *
95do_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__
108static unsigned
109fastrdtsc(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
122static unsigned
123fastrdtsc(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
134static unsigned
135time_diff(unsigned t, unsigned t2)
136{
137   return ((t < t2) ? t2 - t : 0xFFFFFFFFU - (t - t2 - 1));
138}
139
140
141static void *
142timed_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 */
169static void
170intelGenerateMipmap(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
187void
188intelInitTextureFuncs(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}
207