1 /**************************************************************************
3 * Copyright 2008 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 #include "main/imports.h"
30 #include "main/mipmap.h"
31 #include "main/teximage.h"
33 #include "pipe/p_context.h"
34 #include "pipe/p_defines.h"
35 #include "util/u_inlines.h"
36 #include "util/u_format.h"
37 #include "util/u_gen_mipmap.h"
40 #include "st_context.h"
41 #include "st_texture.h"
42 #include "st_gen_mipmap.h"
43 #include "st_cb_bitmap.h"
44 #include "st_cb_texture.h"
48 * Called via ctx->Driver.GenerateMipmap().
51 st_generate_mipmap(struct gl_context
*ctx
, GLenum target
,
52 struct gl_texture_object
*texObj
)
54 struct st_context
*st
= st_context(ctx
);
55 struct st_texture_object
*stObj
= st_texture_object(texObj
);
56 struct pipe_resource
*pt
= st_get_texobj_resource(texObj
);
57 const uint baseLevel
= texObj
->BaseLevel
;
58 enum pipe_format format
;
59 uint lastLevel
, first_layer
, last_layer
;
64 /* not sure if this ultimately actually should work,
65 but we're not supporting multisampled textures yet. */
66 assert(pt
->nr_samples
< 2);
68 /* find expected last mipmap level to generate*/
69 lastLevel
= _mesa_compute_num_levels(ctx
, texObj
, target
) - 1;
74 st_flush_bitmap_cache(st
);
75 st_invalidate_readpix_cache(st
);
77 /* The texture isn't in a "complete" state yet so set the expected
78 * lastLevel here, since it won't get done in st_finalize_texture().
80 stObj
->lastLevel
= lastLevel
;
82 if (!texObj
->Immutable
) {
83 const GLboolean genSave
= texObj
->GenerateMipmap
;
85 /* Temporarily set GenerateMipmap to true so that allocate_full_mipmap()
86 * makes the right decision about full mipmap allocation.
88 texObj
->GenerateMipmap
= GL_TRUE
;
90 _mesa_prepare_mipmap_levels(ctx
, texObj
, baseLevel
, lastLevel
);
92 texObj
->GenerateMipmap
= genSave
;
94 /* At this point, memory for all the texture levels has been
95 * allocated. However, the base level image may be in one resource
96 * while the subsequent/smaller levels may be in another resource.
97 * Finalizing the texture will copy the base images from the former
98 * resource to the latter.
100 * After this, we'll have all mipmap levels in one resource.
102 st_finalize_texture(ctx
, st
->pipe
, texObj
, 0);
107 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "mipmap generation");
111 assert(pt
->last_level
>= lastLevel
);
113 if (pt
->target
== PIPE_TEXTURE_CUBE
) {
114 first_layer
= last_layer
= _mesa_tex_target_to_face(target
);
118 last_layer
= util_max_layer(pt
, baseLevel
);
121 if (stObj
->surface_based
)
122 format
= stObj
->surface_format
;
126 /* First see if the driver supports hardware mipmap generation,
127 * if not then generate the mipmap by rendering/texturing.
128 * If that fails, use the software fallback.
130 if (!st
->pipe
->screen
->get_param(st
->pipe
->screen
,
131 PIPE_CAP_GENERATE_MIPMAP
) ||
132 !st
->pipe
->generate_mipmap(st
->pipe
, pt
, format
, baseLevel
,
133 lastLevel
, first_layer
, last_layer
)) {
135 if (!util_gen_mipmap(st
->pipe
, pt
, format
, baseLevel
, lastLevel
,
136 first_layer
, last_layer
, PIPE_TEX_FILTER_LINEAR
)) {
137 _mesa_generate_mipmap(ctx
, target
, texObj
);