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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
      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 TUNGSTEN GRAPHICS 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 /**
     42  * Subclass of gl_texure_image.
     43  */
     44 struct st_texture_image
     45 {
     46    struct gl_texture_image base;
     47 
     48    /** Used to store texture data that doesn't fit in the parent
     49     * object's mipmap buffer.
     50     */
     51    GLubyte *TexData;
     52 
     53    /* If stImage->pt != NULL, image data is stored here.
     54     * Else if stImage->TexData != NULL, image is stored there.
     55     * Else there is no image data.
     56     */
     57    struct pipe_resource *pt;
     58 
     59    struct pipe_transfer *transfer;
     60 };
     61 
     62 
     63 /**
     64  * Subclass of gl_texure_object.
     65  */
     66 struct st_texture_object
     67 {
     68    struct gl_texture_object base;       /* The "parent" object */
     69 
     70    /* The texture must include at levels [0..lastLevel] once validated:
     71     */
     72    GLuint lastLevel;
     73 
     74    /** The size of the level=0 mipmap image.
     75     * Note that the number of 1D array layers will be in height0 and the
     76     * number of 2D array layers will be in depth0, as in GL.
     77     */
     78    GLuint width0, height0, depth0;
     79 
     80    /* On validation any active images held in main memory or in other
     81     * textures will be copied to this texture and the old storage freed.
     82     */
     83    struct pipe_resource *pt;
     84 
     85    /* Default sampler view attached to this texture object. Created lazily
     86     * on first binding.
     87     */
     88    struct pipe_sampler_view *sampler_view;
     89 
     90    /* True if there is/was a surface bound to this texture object.  It helps
     91     * track whether the texture object is surface based or not.
     92     */
     93    GLboolean surface_based;
     94 };
     95 
     96 
     97 static INLINE struct st_texture_image *
     98 st_texture_image(struct gl_texture_image *img)
     99 {
    100    return (struct st_texture_image *) img;
    101 }
    102 
    103 static INLINE struct st_texture_object *
    104 st_texture_object(struct gl_texture_object *obj)
    105 {
    106    return (struct st_texture_object *) obj;
    107 }
    108 
    109 
    110 static INLINE struct pipe_resource *
    111 st_get_texobj_resource(struct gl_texture_object *texObj)
    112 {
    113    struct st_texture_object *stObj = st_texture_object(texObj);
    114    return stObj ? stObj->pt : NULL;
    115 }
    116 
    117 
    118 static INLINE struct pipe_resource *
    119 st_get_stobj_resource(struct st_texture_object *stObj)
    120 {
    121    return stObj ? stObj->pt : NULL;
    122 }
    123 
    124 
    125 static INLINE struct pipe_sampler_view *
    126 st_create_texture_sampler_view_format(struct pipe_context *pipe,
    127                                       struct pipe_resource *texture,
    128                                       enum pipe_format format)
    129 {
    130    struct pipe_sampler_view templ;
    131 
    132    u_sampler_view_default_template(&templ, texture, format);
    133 
    134    return pipe->create_sampler_view(pipe, texture, &templ);
    135 }
    136 
    137 static INLINE struct pipe_sampler_view *
    138 st_create_texture_sampler_view(struct pipe_context *pipe,
    139                                struct pipe_resource *texture)
    140 {
    141    return st_create_texture_sampler_view_format(pipe, texture,
    142                                                 texture->format);
    143 }
    144 
    145 
    146 
    147 extern struct pipe_resource *
    148 st_texture_create(struct st_context *st,
    149                   enum pipe_texture_target target,
    150 		  enum pipe_format format,
    151                   GLuint last_level,
    152                   GLuint width0,
    153                   GLuint height0,
    154                   GLuint depth0,
    155                   GLuint layers,
    156                   GLuint tex_usage );
    157 
    158 
    159 extern void
    160 st_gl_texture_dims_to_pipe_dims(GLenum texture,
    161                                 GLuint widthIn,
    162                                 GLuint heightIn,
    163                                 GLuint depthIn,
    164                                 GLuint *widthOut,
    165                                 GLuint *heightOut,
    166                                 GLuint *depthOut,
    167                                 GLuint *layersOut);
    168 
    169 /* Check if an image fits into an existing texture object.
    170  */
    171 extern GLboolean
    172 st_texture_match_image(const struct pipe_resource *pt,
    173                        const struct gl_texture_image *image);
    174 
    175 /* Return a pointer to an image within a texture.  Return image stride as
    176  * well.
    177  */
    178 extern GLubyte *
    179 st_texture_image_map(struct st_context *st,
    180                      struct st_texture_image *stImage,
    181 		     GLuint zoffset,
    182                      enum pipe_transfer_usage usage,
    183                      unsigned x, unsigned y,
    184                      unsigned w, unsigned h);
    185 
    186 extern void
    187 st_texture_image_unmap(struct st_context *st,
    188                        struct st_texture_image *stImage);
    189 
    190 
    191 /* Return pointers to each 2d slice within an image.  Indexed by depth
    192  * value.
    193  */
    194 extern const GLuint *
    195 st_texture_depth_offsets(struct pipe_resource *pt, GLuint level);
    196 
    197 
    198 /* Upload an image into a texture
    199  */
    200 extern void
    201 st_texture_image_data(struct st_context *st,
    202                       struct pipe_resource *dst,
    203                       GLuint face, GLuint level, void *src,
    204                       GLuint src_row_pitch, GLuint src_image_pitch);
    205 
    206 
    207 /* Copy an image between two textures
    208  */
    209 extern void
    210 st_texture_image_copy(struct pipe_context *pipe,
    211                       struct pipe_resource *dst, GLuint dstLevel,
    212                       struct pipe_resource *src, GLuint srcLevel,
    213                       GLuint face);
    214 
    215 
    216 extern struct pipe_resource *
    217 st_create_color_map_texture(struct gl_context *ctx);
    218 
    219 #endif
    220