1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "main/imports.h"
#include "main/mipmap.h"
#include "main/teximage.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "util/u_inlines.h"
#include "util/u_format.h"
#include "util/u_gen_mipmap.h"
#include "st_debug.h"
#include "st_context.h"
#include "st_texture.h"
#include "st_gen_mipmap.h"
#include "st_cb_texture.h"
/**
* Compute the expected number of mipmap levels in the texture given
* the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
* GL_TEXTURE_MAX_LEVEL settings. This will tell us how many mipmap
* levels should be generated.
*/
static GLuint
compute_num_levels(struct gl_context *ctx,
struct gl_texture_object *texObj,
GLenum target)
{
const struct gl_texture_image *baseImage;
GLuint numLevels;
baseImage = _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
numLevels = texObj->BaseLevel + baseImage->MaxNumLevels;
numLevels = MIN2(numLevels, (GLuint) texObj->MaxLevel + 1);
assert(numLevels >= 1);
return numLevels;
}
/**
* Called via ctx->Driver.GenerateMipmap().
*/
void
st_generate_mipmap(struct gl_context *ctx, GLenum target,
struct gl_texture_object *texObj)
{
struct st_context *st = st_context(ctx);
struct st_texture_object *stObj = st_texture_object(texObj);
struct pipe_resource *pt = st_get_texobj_resource(texObj);
const uint baseLevel = texObj->BaseLevel;
uint lastLevel, first_layer, last_layer;
uint dstLevel;
if (!pt)
return;
/* not sure if this ultimately actually should work,
but we're not supporting multisampled textures yet. */
assert(pt->nr_samples < 2);
/* find expected last mipmap level to generate*/
lastLevel = compute_num_levels(ctx, texObj, target) - 1;
if (lastLevel == 0)
return;
/* The texture isn't in a "complete" state yet so set the expected
* lastLevel here, since it won't get done in st_finalize_texture().
*/
stObj->lastLevel = lastLevel;
if (pt->last_level < lastLevel) {
/* The current gallium texture doesn't have space for all the
* mipmap levels we need to generate. So allocate a new texture.
*/
struct pipe_resource *oldTex = stObj->pt;
/* create new texture with space for more levels */
stObj->pt = st_texture_create(st,
oldTex->target,
oldTex->format,
lastLevel,
oldTex->width0,
oldTex->height0,
oldTex->depth0,
oldTex->array_size,
0,
oldTex->bind);
/* This will copy the old texture's base image into the new texture
* which we just allocated.
*/
st_finalize_texture(ctx, st->pipe, texObj);
/* release the old tex (will likely be freed too) */
pipe_resource_reference(&oldTex, NULL);
st_texture_release_all_sampler_views(st, stObj);
}
else {
/* Make sure that the base texture image data is present in the
* texture buffer.
*/
st_finalize_texture(ctx, st->pipe, texObj);
}
pt = stObj->pt;
assert(pt->last_level >= lastLevel);
if (pt->target == PIPE_TEXTURE_CUBE) {
first_layer = last_layer = _mesa_tex_target_to_face(target);
}
else {
first_layer = 0;
last_layer = util_max_layer(pt, baseLevel);
}
/* Try to generate the mipmap by rendering/texturing. If that fails,
* use the software fallback.
*/
if (!util_gen_mipmap(st->pipe, pt, pt->format, baseLevel, lastLevel,
first_layer, last_layer, PIPE_TEX_FILTER_LINEAR)) {
_mesa_generate_mipmap(ctx, target, texObj);
}
/* Fill in the Mesa gl_texture_image fields */
for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
const uint srcLevel = dstLevel - 1;
const struct gl_texture_image *srcImage
= _mesa_get_tex_image(ctx, texObj, target, srcLevel);
struct gl_texture_image *dstImage;
struct st_texture_image *stImage;
uint border = srcImage->Border;
uint dstWidth, dstHeight, dstDepth;
dstWidth = u_minify(pt->width0, dstLevel);
if (texObj->Target == GL_TEXTURE_1D_ARRAY) {
dstHeight = pt->array_size;
}
else {
dstHeight = u_minify(pt->height0, dstLevel);
}
if (texObj->Target == GL_TEXTURE_2D_ARRAY ||
texObj->Target == GL_TEXTURE_CUBE_MAP_ARRAY) {
dstDepth = pt->array_size;
}
else {
dstDepth = u_minify(pt->depth0, dstLevel);
}
dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
if (!dstImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
return;
}
/* Free old image data */
ctx->Driver.FreeTextureImageBuffer(ctx, dstImage);
/* initialize new image */
_mesa_init_teximage_fields(ctx, dstImage, dstWidth, dstHeight,
dstDepth, border, srcImage->InternalFormat,
srcImage->TexFormat);
stImage = st_texture_image(dstImage);
pipe_resource_reference(&stImage->pt, pt);
}
}
|
