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      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 *
    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 *
    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 *
    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 *
    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 *
    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 *
    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 *
    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
    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