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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 
     29 #ifndef ST_CB_FBO_H
     30 #define ST_CB_FBO_H
     31 
     32 #include "main/fbobject.h"
     33 #include "main/glheader.h"
     34 #include "main/mtypes.h"
     35 
     36 #include "pipe/p_compiler.h"
     37 #include "pipe/p_format.h"
     38 
     39 struct dd_function_table;
     40 struct pipe_context;
     41 
     42 /**
     43  * Derived renderbuffer class.  Just need to add a pointer to the
     44  * pipe surface.
     45  */
     46 struct st_renderbuffer
     47 {
     48    struct gl_renderbuffer Base;
     49    struct pipe_resource *texture;
     50    /* This points to either "surface_linear" or "surface_srgb".
     51     * It doesn't hold the pipe_surface reference. The other two do.
     52     */
     53    struct pipe_surface *surface;
     54    struct pipe_surface *surface_linear;
     55    struct pipe_surface *surface_srgb;
     56    GLboolean defined;        /**< defined contents? */
     57 
     58    struct pipe_transfer *transfer; /**< only used when mapping the resource */
     59 
     60    /**
     61     * Used only when hardware accumulation buffers are not supported.
     62     */
     63    boolean software;
     64    void *data;
     65 
     66    bool use_readpix_cache;
     67 
     68    /* Inputs from Driver.RenderTexture, don't use directly. */
     69    boolean is_rtt; /**< whether Driver.RenderTexture was called */
     70    unsigned rtt_face, rtt_slice;
     71    boolean rtt_layered; /**< whether glFramebufferTexture was called */
     72 };
     73 
     74 
     75 static inline struct st_renderbuffer *
     76 st_renderbuffer(struct gl_renderbuffer *rb)
     77 {
     78    return (struct st_renderbuffer *) rb;
     79 }
     80 
     81 static inline struct pipe_resource *
     82 st_get_renderbuffer_resource(struct gl_renderbuffer *rb)
     83 {
     84    return st_renderbuffer(rb)->texture;
     85 }
     86 
     87 /**
     88  * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.
     89  * Return NULL if the struct gl_framebuffer is a user-created framebuffer.
     90  * We'll only return non-null for window system framebuffers.
     91  * Note that this function may fail.
     92  */
     93 static inline struct st_framebuffer *
     94 st_ws_framebuffer(struct gl_framebuffer *fb)
     95 {
     96    /* FBO cannot be casted.  See st_new_framebuffer */
     97    if (fb && _mesa_is_winsys_fbo(fb) &&
     98        fb != _mesa_get_incomplete_framebuffer())
     99       return (struct st_framebuffer *) fb;
    100    return NULL;
    101 }
    102 
    103 
    104 extern struct gl_renderbuffer *
    105 st_new_renderbuffer_fb(enum pipe_format format, unsigned samples, boolean sw);
    106 
    107 extern void
    108 st_update_renderbuffer_surface(struct st_context *st,
    109                                struct st_renderbuffer *strb);
    110 
    111 extern void
    112 st_init_fbo_functions(struct dd_function_table *functions);
    113 
    114 #endif /* ST_CB_FBO_H */
    115