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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.    /* These aren't stored in gl_texture_image
  49.     */
  50.    GLuint level;
  51.    GLuint face;
  52.  
  53.    /* If stImage->pt != NULL, image data is stored here.
  54.     * Else if stImage->base.Data != 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.    GLuint width0, height0, depth0;
  76.  
  77.    /* On validation any active images held in main memory or in other
  78.     * textures will be copied to this texture and the old storage freed.
  79.     */
  80.    struct pipe_resource *pt;
  81.  
  82.    /* Default sampler view attached to this texture object. Created lazily
  83.     * on first binding.
  84.     */
  85.    struct pipe_sampler_view *sampler_view;
  86.  
  87.    /* True if there is/was a surface bound to this texture object.  It helps
  88.     * track whether the texture object is surface based or not.
  89.     */
  90.    GLboolean surface_based;
  91. };
  92.  
  93.  
  94. static INLINE struct st_texture_image *
  95. st_texture_image(struct gl_texture_image *img)
  96. {
  97.    return (struct st_texture_image *) img;
  98. }
  99.  
  100. static INLINE struct st_texture_object *
  101. st_texture_object(struct gl_texture_object *obj)
  102. {
  103.    return (struct st_texture_object *) obj;
  104. }
  105.  
  106.  
  107. static INLINE struct pipe_resource *
  108. st_get_texobj_resource(struct gl_texture_object *texObj)
  109. {
  110.    struct st_texture_object *stObj = st_texture_object(texObj);
  111.    return stObj ? stObj->pt : NULL;
  112. }
  113.  
  114.  
  115. static INLINE struct pipe_resource *
  116. st_get_stobj_resource(struct st_texture_object *stObj)
  117. {
  118.    return stObj ? stObj->pt : NULL;
  119. }
  120.  
  121.  
  122. static INLINE struct pipe_sampler_view *
  123. st_create_texture_sampler_view(struct pipe_context *pipe,
  124.                                struct pipe_resource *texture)
  125. {
  126.    struct pipe_sampler_view templ;
  127.  
  128.    u_sampler_view_default_template(&templ,
  129.                                    texture,
  130.                                    texture->format);
  131.  
  132.    return pipe->create_sampler_view(pipe, texture, &templ);
  133. }
  134.  
  135.  
  136. static INLINE struct pipe_sampler_view *
  137. st_create_texture_sampler_view_format(struct pipe_context *pipe,
  138.                                       struct pipe_resource *texture,
  139.                                       enum pipe_format format)
  140. {
  141.    struct pipe_sampler_view templ;
  142.  
  143.    u_sampler_view_default_template(&templ,
  144.                                    texture,
  145.                                    format);
  146.  
  147.    return pipe->create_sampler_view(pipe, texture, &templ);
  148. }
  149.  
  150. static INLINE struct pipe_sampler_view *
  151. st_get_texture_sampler_view(struct st_texture_object *stObj,
  152.                             struct pipe_context *pipe)
  153.  
  154. {
  155.    if (!stObj || !stObj->pt) {
  156.       return NULL;
  157.    }
  158.  
  159.    if (!stObj->sampler_view) {
  160.       stObj->sampler_view = st_create_texture_sampler_view(pipe, stObj->pt);
  161.    }
  162.  
  163.    return stObj->sampler_view;
  164. }
  165.  
  166.  
  167. extern struct pipe_resource *
  168. st_texture_create(struct st_context *st,
  169.                   enum pipe_texture_target target,
  170.                   enum pipe_format format,
  171.                   GLuint last_level,
  172.                   GLuint width0,
  173.                   GLuint height0,
  174.                   GLuint depth0,
  175.                   GLuint tex_usage );
  176.  
  177.  
  178. /* Check if an image fits into an existing texture object.
  179.  */
  180. extern GLboolean
  181. st_texture_match_image(const struct pipe_resource *pt,
  182.                        const struct gl_texture_image *image,
  183.                        GLuint face, GLuint level);
  184.  
  185. /* Return a pointer to an image within a texture.  Return image stride as
  186.  * well.
  187.  */
  188. extern GLubyte *
  189. st_texture_image_map(struct st_context *st,
  190.                      struct st_texture_image *stImage,
  191.                      GLuint zoffset,
  192.                      enum pipe_transfer_usage usage,
  193.                      unsigned x, unsigned y,
  194.                      unsigned w, unsigned h);
  195.  
  196. extern void
  197. st_texture_image_unmap(struct st_context *st,
  198.                        struct st_texture_image *stImage);
  199.  
  200.  
  201. /* Return pointers to each 2d slice within an image.  Indexed by depth
  202.  * value.
  203.  */
  204. extern const GLuint *
  205. st_texture_depth_offsets(struct pipe_resource *pt, GLuint level);
  206.  
  207.  
  208. /* Upload an image into a texture
  209.  */
  210. extern void
  211. st_texture_image_data(struct st_context *st,
  212.                       struct pipe_resource *dst,
  213.                       GLuint face, GLuint level, void *src,
  214.                       GLuint src_row_pitch, GLuint src_image_pitch);
  215.  
  216.  
  217. /* Copy an image between two textures
  218.  */
  219. extern void
  220. st_texture_image_copy(struct pipe_context *pipe,
  221.                       struct pipe_resource *dst, GLuint dstLevel,
  222.                       struct pipe_resource *src, GLuint srcLevel,
  223.                       GLuint face);
  224.  
  225. #endif
  226.