1 /**************************************************************************
3 * Copyright 2007 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 **************************************************************************/
32 #include "pipe/p_context.h"
33 #include "util/u_sampler.h"
34 #include "util/simple_mtx.h"
36 #include "main/mtypes.h"
42 struct st_texture_image_transfer
{
43 struct pipe_transfer
*transfer
;
45 /* For ETC fallback. */
46 GLubyte
*temp_data
; /**< Temporary ETC texture storage. */
47 unsigned temp_stride
; /**< Stride of the ETC texture storage. */
48 GLubyte
*map
; /**< Saved map pointer of the uncompressed transfer. */
53 * Container for one context's validated sampler view.
55 struct st_sampler_view
{
56 struct pipe_sampler_view
*view
;
58 /** The glsl version of the shader seen during validation */
59 bool glsl130_or_later
;
60 /** Derived from the sampler's sRGBDecode state during validation */
61 bool srgb_skip_decode
;
66 * Container for per-context sampler views of a texture.
68 struct st_sampler_views
{
69 struct st_sampler_views
*next
;
72 struct st_sampler_view views
[0];
76 * Subclass of gl_texure_image.
78 struct st_texture_image
80 struct gl_texture_image base
;
82 /* If stImage->pt != NULL, image data is stored here.
83 * Else there is no image data.
85 struct pipe_resource
*pt
;
87 /* List of transfers, allocated on demand.
88 * transfer[layer] is a mapping for that layer.
90 struct st_texture_image_transfer
*transfer
;
91 unsigned num_transfers
;
93 /* For ETC images, keep track of the original data. This is necessary for
94 * mapping/unmapping, as well as image copies.
101 * Subclass of gl_texure_object.
103 struct st_texture_object
105 struct gl_texture_object base
; /* The "parent" object */
107 /* The texture must include at levels [0..lastLevel] once validated:
111 unsigned int validated_first_level
;
112 unsigned int validated_last_level
;
114 /* On validation any active images held in main memory or in other
115 * textures will be copied to this texture and the old storage freed.
117 struct pipe_resource
*pt
;
119 /* Protect modifications of the sampler_views array */
120 simple_mtx_t validate_mutex
;
122 /* Container of sampler views (one per context) attached to this texture
123 * object. Created lazily on first binding in context.
125 * Purely read-only accesses to the current context's own sampler view
126 * require no locking. Another thread may simultaneously replace the
127 * container object in order to grow the array, but the old container will
130 * Writing to the container (even for modifying the current context's own
131 * sampler view) always requires taking the validate_mutex to protect against
132 * concurrent container switches.
134 * NULL'ing another context's sampler view is allowed only while
135 * implementing an API call that modifies the texture: an application which
136 * calls those while simultaneously reading the texture in another context
137 * invokes undefined behavior. (TODO: a dubious violation of this rule is
138 * st_finalize_texture, which is a lazy operation that corresponds to a
139 * texture modification.)
141 struct st_sampler_views
*sampler_views
;
143 /* Old sampler views container objects that have not been freed yet because
144 * other threads/contexts may still be reading from them.
146 struct st_sampler_views
*sampler_views_old
;
148 /* True if this texture comes from the window system. Such a texture
149 * cannot be reallocated and the format can only be changed with a sampler
152 GLboolean surface_based
;
154 /* If surface_based is true, this format should be used for all sampler
155 * views and surfaces instead of pt->format.
157 enum pipe_format surface_format
;
159 /* When non-zero, samplers should use this level instead of the level
160 * range specified by the GL state.
162 * This is used for EGL images, which may correspond to a single level out
163 * of an imported pipe_resources with multiple mip levels.
167 /* When non-zero, samplers should use this layer instead of the one
168 * specified by the GL state.
170 * This is used for EGL images and VDPAU interop, where imported
171 * pipe_resources may be cube, 3D, or array textures (containing layers
172 * with different fields in the case of VDPAU) even though the GL state
173 * describes one non-array texture per field.
178 * Set when the texture images of this texture object might not all be in
179 * the pipe_resource *pt above.
181 bool needs_validation
;
185 static inline struct st_texture_image
*
186 st_texture_image(struct gl_texture_image
*img
)
188 return (struct st_texture_image
*) img
;
191 static inline const struct st_texture_image
*
192 st_texture_image_const(const struct gl_texture_image
*img
)
194 return (const struct st_texture_image
*) img
;
197 static inline struct st_texture_object
*
198 st_texture_object(struct gl_texture_object
*obj
)
200 return (struct st_texture_object
*) obj
;
203 static inline const struct st_texture_object
*
204 st_texture_object_const(const struct gl_texture_object
*obj
)
206 return (const struct st_texture_object
*) obj
;
210 static inline struct pipe_resource
*
211 st_get_texobj_resource(struct gl_texture_object
*texObj
)
213 struct st_texture_object
*stObj
= st_texture_object(texObj
);
214 return stObj
? stObj
->pt
: NULL
;
218 static inline struct pipe_resource
*
219 st_get_stobj_resource(struct st_texture_object
*stObj
)
221 return stObj
? stObj
->pt
: NULL
;
225 static inline struct st_texture_object
*
226 st_get_texture_object(struct gl_context
*ctx
,
227 const struct gl_program
*prog
,
230 const GLuint texUnit
= prog
->SamplerUnits
[unit
];
231 struct gl_texture_object
*texObj
= ctx
->Texture
.Unit
[texUnit
]._Current
;
236 return st_texture_object(texObj
);
239 static inline enum pipe_format
240 st_get_view_format(struct st_texture_object
*stObj
)
243 return PIPE_FORMAT_NONE
;
244 return stObj
->surface_based
? stObj
->surface_format
: stObj
->pt
->format
;
248 extern struct pipe_resource
*
249 st_texture_create(struct st_context
*st
,
250 enum pipe_texture_target target
,
251 enum pipe_format format
,
262 st_gl_texture_dims_to_pipe_dims(GLenum texture
,
269 uint16_t *layersOut
);
271 /* Check if an image fits into an existing texture object.
274 st_texture_match_image(struct st_context
*st
,
275 const struct pipe_resource
*pt
,
276 const struct gl_texture_image
*image
);
278 /* Return a pointer to an image within a texture. Return image stride as
282 st_texture_image_map(struct st_context
*st
, struct st_texture_image
*stImage
,
283 enum pipe_transfer_usage usage
,
284 GLuint x
, GLuint y
, GLuint z
,
285 GLuint w
, GLuint h
, GLuint d
,
286 struct pipe_transfer
**transfer
);
289 st_texture_image_unmap(struct st_context
*st
,
290 struct st_texture_image
*stImage
, unsigned slice
);
293 /* Return pointers to each 2d slice within an image. Indexed by depth
296 extern const GLuint
*
297 st_texture_depth_offsets(struct pipe_resource
*pt
, GLuint level
);
299 /* Copy an image between two textures
302 st_texture_image_copy(struct pipe_context
*pipe
,
303 struct pipe_resource
*dst
, GLuint dstLevel
,
304 struct pipe_resource
*src
, GLuint srcLevel
,
308 extern struct pipe_resource
*
309 st_create_color_map_texture(struct gl_context
*ctx
);
312 st_destroy_bound_texture_handles(struct st_context
*st
);
315 st_destroy_bound_image_handles(struct st_context
*st
);
318 st_etc_fallback(struct st_context
*st
, struct gl_texture_image
*texImage
);
321 st_convert_image(const struct st_context
*st
, const struct gl_image_unit
*u
,
322 struct pipe_image_view
*img
);
325 st_convert_image_from_unit(const struct st_context
*st
,
326 struct pipe_image_view
*img
,
330 st_convert_sampler(const struct st_context
*st
,
331 const struct gl_texture_object
*texobj
,
332 const struct gl_sampler_object
*msamp
,
333 float tex_unit_lod_bias
,
334 struct pipe_sampler_state
*sampler
);
337 st_convert_sampler_from_unit(const struct st_context
*st
,
338 struct pipe_sampler_state
*sampler
,
342 st_update_single_texture(struct st_context
*st
,
343 struct pipe_sampler_view
**sampler_view
,
344 GLuint texUnit
, bool glsl130_or_later
,
345 bool ignore_srgb_decode
);
348 st_make_bound_samplers_resident(struct st_context
*st
,
349 struct gl_program
*prog
);
352 st_make_bound_images_resident(struct st_context
*st
,
353 struct gl_program
*prog
);