1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
28 #ifndef ST_TEXTURE_H
29 #define ST_TEXTURE_H
30
31
32 #include "pipe/p_context.h"
33 #include "util/u_sampler.h"
34
35 #include "main/mtypes.h"
36
37
38 struct pipe_resource;
39
40
41 struct st_texture_image_transfer {
42 struct pipe_transfer *transfer;
43
44 /* For ETC fallback. */
45 GLubyte *temp_data; /**< Temporary ETC texture storage. */
46 unsigned temp_stride; /**< Stride of the ETC texture storage. */
47 GLubyte *map; /**< Saved map pointer of the uncompressed transfer. */
48 };
49
50
51 /**
52 * Subclass of gl_texure_image.
53 */
54 struct st_texture_image
55 {
56 struct gl_texture_image base;
57
58 /* If stImage->pt != NULL, image data is stored here.
59 * Else there is no image data.
60 */
61 struct pipe_resource *pt;
62
63 /* List of transfers, allocated on demand.
64 * transfer[layer] is a mapping for that layer.
65 */
66 struct st_texture_image_transfer *transfer;
67 unsigned num_transfers;
68
69 /* For ETC images, keep track of the original data. This is necessary for
70 * mapping/unmapping, as well as image copies.
71 */
72 GLubyte *etc_data;
73 };
74
75
76 /**
77 * Subclass of gl_texure_object.
78 */
79 struct st_texture_object
80 {
81 struct gl_texture_object base; /* The "parent" object */
82
83 /* The texture must include at levels [0..lastLevel] once validated:
84 */
85 GLuint lastLevel;
86
87 /* On validation any active images held in main memory or in other
88 * textures will be copied to this texture and the old storage freed.
89 */
90 struct pipe_resource *pt;
91
92 /* Number of views in sampler_views array */
93 GLuint num_sampler_views;
94
95 /* Array of sampler views (one per context) attached to this texture
96 * object. Created lazily on first binding in context.
97 */
98 struct pipe_sampler_view **sampler_views;
99
100 /* True if this texture comes from the window system. Such a texture
101 * cannot be reallocated and the format can only be changed with a sampler
102 * view or a surface.
103 */
104 GLboolean surface_based;
105
106 /* If surface_based is true, this format should be used for all sampler
107 * views and surfaces instead of pt->format.
108 */
109 enum pipe_format surface_format;
110
111 /* When non-zero, samplers should use this layer instead of the one
112 * specified by the GL state.
113 *
114 * This is used for VDPAU interop, where imported pipe_resources may be
115 * array textures (containing layers with different fields) even though the
116 * GL state describes one non-array texture per field.
117 */
118 uint layer_override;
119
120 /** The glsl version of the shader seen during the previous validation */
121 unsigned prev_glsl_version;
122 /** The value of the sampler's sRGBDecode state at the previous validation */
123 GLenum prev_sRGBDecode;
124 };
125
126
127 static inline struct st_texture_image *
st_texture_image(struct gl_texture_image * img)128 st_texture_image(struct gl_texture_image *img)
129 {
130 return (struct st_texture_image *) img;
131 }
132
133 static inline const struct st_texture_image *
st_texture_image_const(const struct gl_texture_image * img)134 st_texture_image_const(const struct gl_texture_image *img)
135 {
136 return (const struct st_texture_image *) img;
137 }
138
139 static inline struct st_texture_object *
st_texture_object(struct gl_texture_object * obj)140 st_texture_object(struct gl_texture_object *obj)
141 {
142 return (struct st_texture_object *) obj;
143 }
144
145 static inline const struct st_texture_object *
st_texture_object_const(const struct gl_texture_object * obj)146 st_texture_object_const(const struct gl_texture_object *obj)
147 {
148 return (const struct st_texture_object *) obj;
149 }
150
151
152 static inline struct pipe_resource *
st_get_texobj_resource(struct gl_texture_object * texObj)153 st_get_texobj_resource(struct gl_texture_object *texObj)
154 {
155 struct st_texture_object *stObj = st_texture_object(texObj);
156 return stObj ? stObj->pt : NULL;
157 }
158
159
160 static inline struct pipe_resource *
st_get_stobj_resource(struct st_texture_object * stObj)161 st_get_stobj_resource(struct st_texture_object *stObj)
162 {
163 return stObj ? stObj->pt : NULL;
164 }
165
166
167 static inline struct st_texture_object *
st_get_texture_object(struct gl_context * ctx,const struct gl_program * prog,unsigned unit)168 st_get_texture_object(struct gl_context *ctx,
169 const struct gl_program *prog,
170 unsigned unit)
171 {
172 const GLuint texUnit = prog->SamplerUnits[unit];
173 struct gl_texture_object *texObj = ctx->Texture.Unit[texUnit]._Current;
174
175 if (!texObj)
176 return NULL;
177
178 return st_texture_object(texObj);
179 }
180
181 static inline enum pipe_format
st_get_view_format(struct st_texture_object * stObj)182 st_get_view_format(struct st_texture_object *stObj)
183 {
184 if (!stObj)
185 return PIPE_FORMAT_NONE;
186 return stObj->surface_based ? stObj->surface_format : stObj->pt->format;
187 }
188
189
190 extern struct pipe_resource *
191 st_texture_create(struct st_context *st,
192 enum pipe_texture_target target,
193 enum pipe_format format,
194 GLuint last_level,
195 GLuint width0,
196 GLuint height0,
197 GLuint depth0,
198 GLuint layers,
199 GLuint nr_samples,
200 GLuint tex_usage );
201
202
203 extern void
204 st_gl_texture_dims_to_pipe_dims(GLenum texture,
205 GLuint widthIn,
206 GLuint heightIn,
207 GLuint depthIn,
208 GLuint *widthOut,
209 GLuint *heightOut,
210 GLuint *depthOut,
211 GLuint *layersOut);
212
213 /* Check if an image fits into an existing texture object.
214 */
215 extern GLboolean
216 st_texture_match_image(struct st_context *st,
217 const struct pipe_resource *pt,
218 const struct gl_texture_image *image);
219
220 /* Return a pointer to an image within a texture. Return image stride as
221 * well.
222 */
223 extern GLubyte *
224 st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,
225 enum pipe_transfer_usage usage,
226 GLuint x, GLuint y, GLuint z,
227 GLuint w, GLuint h, GLuint d,
228 struct pipe_transfer **transfer);
229
230 extern void
231 st_texture_image_unmap(struct st_context *st,
232 struct st_texture_image *stImage, unsigned slice);
233
234
235 /* Return pointers to each 2d slice within an image. Indexed by depth
236 * value.
237 */
238 extern const GLuint *
239 st_texture_depth_offsets(struct pipe_resource *pt, GLuint level);
240
241 /* Copy an image between two textures
242 */
243 extern void
244 st_texture_image_copy(struct pipe_context *pipe,
245 struct pipe_resource *dst, GLuint dstLevel,
246 struct pipe_resource *src, GLuint srcLevel,
247 GLuint face);
248
249
250 extern struct pipe_resource *
251 st_create_color_map_texture(struct gl_context *ctx);
252
253
254 bool
255 st_etc_fallback(struct st_context *st, struct gl_texture_image *texImage);
256
257 #endif
258