src/mesa/state_tracker/st_texture.h

   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
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  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 "main/mtypes.h"
  33
  34 struct pipe_context;
  35 struct pipe_texture;
  36
  37
  38 struct st_texture_image
  39 {
  40    struct gl_texture_image base;
  41
  42    /* These aren't stored in gl_texture_image
  43     */
  44    GLuint level;
  45    GLuint face;
  46
  47    /* If stImage->pt != NULL, image data is stored here.
  48     * Else if stImage->base.Data != NULL, image is stored there.
  49     * Else there is no image data.
  50     */
  51    struct pipe_texture *pt;
  52
  53    struct pipe_surface *surface;
  54 };
  55
  56
  57
  58 struct st_texture_object
  59 {
  60    struct gl_texture_object base;       /* The "parent" object */
  61
  62    /* The texture must include at levels [0..lastLevel] once validated:
  63     */
  64    GLuint lastLevel;
  65
  66    /* On validation any active images held in main memory or in other
  67     * textures will be copied to this texture and the old storage freed.
  68     */
  69    struct pipe_texture *pt;
  70
  71    GLboolean teximage_realloc;
  72 };
  73
  74
  75 static INLINE struct st_texture_object *
  76 st_texture_object(struct gl_texture_object *obj)
  77 {
  78    return (struct st_texture_object *) obj;
  79 }
  80
  81
  82 static INLINE struct pipe_texture *
  83 st_get_texobj_texture(struct gl_texture_object *texObj)
  84 {
  85    struct st_texture_object *stObj = st_texture_object(texObj);
  86    return stObj ? stObj->pt : NULL;
  87 }
  88
  89
  90 static INLINE struct pipe_texture *
  91 st_get_stobj_texture(struct st_texture_object *stObj)
  92 {
  93    return stObj ? stObj->pt : NULL;
  94 }
  95
  96 static INLINE GLboolean pf_is_depth_stencil( enum pipe_format format )
  97 {
  98    return (pf_get_component_bits( format, PIPE_FORMAT_COMP_Z ) +
  99            pf_get_component_bits( format, PIPE_FORMAT_COMP_S )) != 0;
 100 }
 101
 102
 103 extern struct pipe_texture *
 104 st_texture_create(struct st_context *st,
 105                   enum pipe_texture_target target,
 106                   enum pipe_format format,
 107                   GLuint last_level,
 108                   GLuint width0,
 109                   GLuint height0,
 110                   GLuint depth0,
 111                   GLuint compress_byte,
 112                   GLuint tex_usage );
 113
 114
 115 /* Check if an image fits into an existing texture object.
 116  */
 117 extern GLboolean
 118 st_texture_match_image(const struct pipe_texture *pt,
 119                        const struct gl_texture_image *image,
 120                        GLuint face, GLuint level);
 121
 122 /* Return a pointer to an image within a texture.  Return image stride as
 123  * well.
 124  */
 125 extern GLubyte *
 126 st_texture_image_map(struct st_context *st,
 127                      struct st_texture_image *stImage,
 128                      GLuint zoffset,
 129                      GLuint flags);
 130
 131 extern void
 132 st_texture_image_unmap(struct st_context *st,
 133                        struct st_texture_image *stImage);
 134
 135
 136 /* Return pointers to each 2d slice within an image.  Indexed by depth
 137  * value.
 138  */
 139 extern const GLuint *
 140 st_texture_depth_offsets(struct pipe_texture *pt, GLuint level);
 141
 142
 143 /* Return the linear offset of an image relative to the start of its region.
 144  */
 145 extern GLuint
 146 st_texture_image_offset(const struct pipe_texture *pt,
 147                         GLuint face, GLuint level);
 148
 149 extern GLuint
 150 st_texture_texel_offset(const struct pipe_texture * pt,
 151                         GLuint face, GLuint level,
 152                         GLuint col, GLuint row, GLuint img);
 153
 154
 155 /* Upload an image into a texture
 156  */
 157 extern void
 158 st_texture_image_data(struct pipe_context *pipe,
 159                       struct pipe_texture *dst,
 160                       GLuint face, GLuint level, void *src,
 161                       GLuint src_row_pitch, GLuint src_image_pitch);
 162
 163
 164 /* Copy an image between two textures
 165  */
 166 extern void
 167 st_texture_image_copy(struct pipe_context *pipe,
 168                       struct pipe_texture *dst, GLuint dstLevel,
 169                       struct pipe_texture *src,
 170                       GLuint face);
 171
 172
 173 #endif