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      1 /*
      2  * Mesa 3-D graphics library
      3  *
      4  * Copyright (C) 1999-2006  Brian Paul   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 "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included
     14  * in all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 
     26 #ifndef FRAMEBUFFER_H
     27 #define FRAMEBUFFER_H
     28 
     29 #include "mtypes.h"
     30 
     31 struct gl_config;
     32 struct gl_context;
     33 struct gl_renderbuffer;
     34 
     35 extern struct gl_framebuffer *
     36 _mesa_create_framebuffer(const struct gl_config *visual);
     37 
     38 extern struct gl_framebuffer *
     39 _mesa_new_framebuffer(struct gl_context *ctx, GLuint name);
     40 
     41 extern void
     42 _mesa_initialize_window_framebuffer(struct gl_framebuffer *fb,
     43 				     const struct gl_config *visual);
     44 
     45 extern void
     46 _mesa_initialize_user_framebuffer(struct gl_framebuffer *fb, GLuint name);
     47 
     48 extern void
     49 _mesa_destroy_framebuffer(struct gl_framebuffer *buffer);
     50 
     51 extern void
     52 _mesa_free_framebuffer_data(struct gl_framebuffer *buffer);
     53 
     54 extern void
     55 _mesa_reference_framebuffer_(struct gl_framebuffer **ptr,
     56                              struct gl_framebuffer *fb);
     57 
     58 static inline void
     59 _mesa_reference_framebuffer(struct gl_framebuffer **ptr,
     60                             struct gl_framebuffer *fb)
     61 {
     62    if (*ptr != fb)
     63       _mesa_reference_framebuffer_(ptr, fb);
     64 }
     65 
     66 extern void
     67 _mesa_resize_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
     68                          GLuint width, GLuint height);
     69 
     70 
     71 extern void
     72 _mesa_resizebuffers( struct gl_context *ctx );
     73 
     74 extern void
     75 _mesa_intersect_scissor_bounding_box(const struct gl_context *ctx,
     76                                      unsigned idx, int *bbox);
     77 
     78 static inline GLuint
     79 _mesa_geometric_width(const struct gl_framebuffer *buffer)
     80 {
     81    return buffer->_HasAttachments ?
     82       buffer->Width : buffer->DefaultGeometry.Width;
     83 }
     84 
     85 static inline GLuint
     86 _mesa_geometric_height(const struct gl_framebuffer *buffer)
     87 {
     88    return buffer->_HasAttachments ?
     89       buffer->Height : buffer->DefaultGeometry.Height;
     90 }
     91 
     92 static inline GLuint
     93 _mesa_geometric_samples(const struct gl_framebuffer *buffer)
     94 {
     95    return buffer->_HasAttachments ?
     96       buffer->Visual.samples :
     97       buffer->DefaultGeometry._NumSamples;
     98 }
     99 
    100 static inline GLuint
    101 _mesa_geometric_layers(const struct gl_framebuffer *buffer)
    102 {
    103    return buffer->_HasAttachments ?
    104       buffer->MaxNumLayers : buffer->DefaultGeometry.Layers;
    105 }
    106 
    107 extern void
    108 _mesa_update_draw_buffer_bounds(struct gl_context *ctx,
    109                                 struct gl_framebuffer *drawFb);
    110 
    111 extern void
    112 _mesa_update_framebuffer_visual(struct gl_context *ctx,
    113 				struct gl_framebuffer *fb);
    114 
    115 extern void
    116 _mesa_update_framebuffer(struct gl_context *ctx,
    117                          struct gl_framebuffer *readFb,
    118                          struct gl_framebuffer *drawFb);
    119 
    120 extern GLboolean
    121 _mesa_source_buffer_exists(struct gl_context *ctx, GLenum format);
    122 
    123 extern GLboolean
    124 _mesa_dest_buffer_exists(struct gl_context *ctx, GLenum format);
    125 
    126 extern GLenum
    127 _mesa_get_color_read_type(struct gl_context *ctx,
    128                           struct gl_framebuffer *fb,
    129                           const char *caller);
    130 
    131 extern GLenum
    132 _mesa_get_color_read_format(struct gl_context *ctx,
    133                             struct gl_framebuffer *fb,
    134                             const char *caller);
    135 
    136 extern struct gl_renderbuffer *
    137 _mesa_get_read_renderbuffer_for_format(const struct gl_context *ctx,
    138                                        GLenum format);
    139 
    140 extern void
    141 _mesa_print_framebuffer(const struct gl_framebuffer *fb);
    142 
    143 extern bool
    144 _mesa_is_front_buffer_reading(const struct gl_framebuffer *fb);
    145 
    146 extern bool
    147 _mesa_is_front_buffer_drawing(const struct gl_framebuffer *fb);
    148 
    149 extern bool
    150 _mesa_is_multisample_enabled(const struct gl_context *ctx);
    151 
    152 extern bool
    153 _mesa_is_alpha_test_enabled(const struct gl_context *ctx);
    154 
    155 extern bool
    156 _mesa_is_alpha_to_coverage_enabled(const struct gl_context *ctx);
    157 
    158 #endif /* FRAMEBUFFER_H */
    159