src/mesa/state_tracker/st_texture.h

   1 /**************************************************************************
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   3  * Copyright 2007 VMware, Inc.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  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    unsigned int validated_first_level;
  88    unsigned int validated_last_level;
  89
  90    /* On validation any active images held in main memory or in other
  91     * textures will be copied to this texture and the old storage freed.
  92     */
  93    struct pipe_resource *pt;
  94
  95    /* Number of views in sampler_views array */
  96    GLuint num_sampler_views;
  97
  98    /* Array of sampler views (one per context) attached to this texture
  99     * object. Created lazily on first binding in context.
 100     */
 101    struct pipe_sampler_view **sampler_views;
 102
 103    /* True if this texture comes from the window system. Such a texture
 104     * cannot be reallocated and the format can only be changed with a sampler
 105     * view or a surface.
 106     */
 107    GLboolean surface_based;
 108
 109    /* If surface_based is true, this format should be used for all sampler
 110     * views and surfaces instead of pt->format.
 111     */
 112    enum pipe_format surface_format;
 113
 114    /* When non-zero, samplers should use this layer instead of the one
 115     * specified by the GL state.
 116     *
 117     * This is used for VDPAU interop, where imported pipe_resources may be
 118     * array textures (containing layers with different fields) even though the
 119     * GL state describes one non-array texture per field.
 120     */
 121    uint layer_override;
 122
 123    /** The glsl version of the shader seen during the previous validation */
 124    unsigned prev_glsl_version;
 125    /** The value of the sampler's sRGBDecode state at the previous validation */
 126    GLenum prev_sRGBDecode;
 127
 128     /**
 129      * Set when the texture images of this texture object might not all be in
 130      * the pipe_resource *pt above.
 131      */
 132     bool needs_validation;
 133 };
 134
 135
 136 static inline struct st_texture_image *
 137 st_texture_image(struct gl_texture_image *img)
 138 {
 139    return (struct st_texture_image *) img;
 140 }
 141
 142 static inline const struct st_texture_image *
 143 st_texture_image_const(const struct gl_texture_image *img)
 144 {
 145    return (const struct st_texture_image *) img;
 146 }
 147
 148 static inline struct st_texture_object *
 149 st_texture_object(struct gl_texture_object *obj)
 150 {
 151    return (struct st_texture_object *) obj;
 152 }
 153
 154 static inline const struct st_texture_object *
 155 st_texture_object_const(const struct gl_texture_object *obj)
 156 {
 157    return (const struct st_texture_object *) obj;
 158 }
 159
 160
 161 static inline struct pipe_resource *
 162 st_get_texobj_resource(struct gl_texture_object *texObj)
 163 {
 164    struct st_texture_object *stObj = st_texture_object(texObj);
 165    return stObj ? stObj->pt : NULL;
 166 }
 167
 168
 169 static inline struct pipe_resource *
 170 st_get_stobj_resource(struct st_texture_object *stObj)
 171 {
 172    return stObj ? stObj->pt : NULL;
 173 }
 174
 175
 176 static inline struct st_texture_object *
 177 st_get_texture_object(struct gl_context *ctx,
 178                       const struct gl_program *prog,
 179                       unsigned unit)
 180 {
 181    const GLuint texUnit = prog->SamplerUnits[unit];
 182    struct gl_texture_object *texObj = ctx->Texture.Unit[texUnit]._Current;
 183
 184    if (!texObj)
 185       return NULL;
 186
 187    return st_texture_object(texObj);
 188 }
 189
 190 static inline enum pipe_format
 191 st_get_view_format(struct st_texture_object *stObj)
 192 {
 193    if (!stObj)
 194       return PIPE_FORMAT_NONE;
 195    return stObj->surface_based ? stObj->surface_format : stObj->pt->format;
 196 }
 197
 198
 199 extern struct pipe_resource *
 200 st_texture_create(struct st_context *st,
 201                   enum pipe_texture_target target,
 202                   enum pipe_format format,
 203                   GLuint last_level,
 204                   GLuint width0,
 205                   GLuint height0,
 206                   GLuint depth0,
 207                   GLuint layers,
 208                   GLuint nr_samples,
 209                   GLuint tex_usage );
 210
 211
 212 extern void
 213 st_gl_texture_dims_to_pipe_dims(GLenum texture,
 214                                 unsigned widthIn,
 215                                 uint16_t heightIn,
 216                                 uint16_t depthIn,
 217                                 unsigned *widthOut,
 218                                 uint16_t *heightOut,
 219                                 uint16_t *depthOut,
 220                                 uint16_t *layersOut);
 221
 222 /* Check if an image fits into an existing texture object.
 223  */
 224 extern GLboolean
 225 st_texture_match_image(struct st_context *st,
 226                        const struct pipe_resource *pt,
 227                        const struct gl_texture_image *image);
 228
 229 /* Return a pointer to an image within a texture.  Return image stride as
 230  * well.
 231  */
 232 extern GLubyte *
 233 st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,
 234                      enum pipe_transfer_usage usage,
 235                      GLuint x, GLuint y, GLuint z,
 236                      GLuint w, GLuint h, GLuint d,
 237                      struct pipe_transfer **transfer);
 238
 239 extern void
 240 st_texture_image_unmap(struct st_context *st,
 241                        struct st_texture_image *stImage, unsigned slice);
 242
 243
 244 /* Return pointers to each 2d slice within an image.  Indexed by depth
 245  * value.
 246  */
 247 extern const GLuint *
 248 st_texture_depth_offsets(struct pipe_resource *pt, GLuint level);
 249
 250 /* Copy an image between two textures
 251  */
 252 extern void
 253 st_texture_image_copy(struct pipe_context *pipe,
 254                       struct pipe_resource *dst, GLuint dstLevel,
 255                       struct pipe_resource *src, GLuint srcLevel,
 256                       GLuint face);
 257
 258
 259 extern struct pipe_resource *
 260 st_create_color_map_texture(struct gl_context *ctx);
 261
 262 void
 263 st_destroy_bound_texture_handles(struct st_context *st);
 264
 265 void
 266 st_destroy_bound_image_handles(struct st_context *st);
 267
 268 bool
 269 st_etc_fallback(struct st_context *st, struct gl_texture_image *texImage);
 270
 271 void
 272 st_convert_image(const struct st_context *st, const struct gl_image_unit *u,
 273                  struct pipe_image_view *img);
 274
 275 void
 276 st_convert_image_from_unit(const struct st_context *st,
 277                            struct pipe_image_view *img,
 278                            GLuint imgUnit);
 279
 280 void
 281 st_convert_sampler(const struct st_context *st,
 282                    const struct gl_texture_object *texobj,
 283                    const struct gl_sampler_object *msamp,
 284                    struct pipe_sampler_state *sampler);
 285
 286 void
 287 st_convert_sampler_from_unit(const struct st_context *st,
 288                              struct pipe_sampler_state *sampler,
 289                              GLuint texUnit);
 290
 291 GLboolean
 292 st_update_single_texture(struct st_context *st,
 293                          struct pipe_sampler_view **sampler_view,
 294                          GLuint texUnit, unsigned glsl_version);
 295
 296 #endif