1 /**************************************************************************
3 * Copyright 2003 VMware, Inc.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
28 #include "brw_context.h"
29 #include "intel_buffers.h"
30 #include "intel_fbo.h"
31 #include "intel_mipmap_tree.h"
33 #include "main/fbobject.h"
34 #include "main/framebuffer.h"
35 #include "main/renderbuffer.h"
39 brw_is_front_buffer_reading(struct gl_framebuffer
*fb
)
41 if (!fb
|| _mesa_is_user_fbo(fb
))
44 return fb
->_ColorReadBufferIndex
== BUFFER_FRONT_LEFT
;
48 brw_is_front_buffer_drawing(struct gl_framebuffer
*fb
)
50 if (!fb
|| _mesa_is_user_fbo(fb
))
53 return (fb
->_NumColorDrawBuffers
>= 1 &&
54 fb
->_ColorDrawBufferIndexes
[0] == BUFFER_FRONT_LEFT
);
58 intelDrawBuffer(struct gl_context
* ctx
, GLenum mode
)
60 if (brw_is_front_buffer_drawing(ctx
->DrawBuffer
)) {
61 struct brw_context
*const brw
= brw_context(ctx
);
63 /* If we might be front-buffer rendering on this buffer for the first
64 * time, invalidate our DRI drawable so we'll ask for new buffers
65 * (including the fake front) before we start rendering again.
67 dri2InvalidateDrawable(brw
->driContext
->driDrawablePriv
);
73 intelReadBuffer(struct gl_context
* ctx
, GLenum mode
)
75 if (brw_is_front_buffer_reading(ctx
->ReadBuffer
)) {
76 struct brw_context
*const brw
= brw_context(ctx
);
78 /* If we might be front-buffer reading on this buffer for the first
79 * time, invalidate our DRI drawable so we'll ask for new buffers
80 * (including the fake front) before we start reading again.
82 dri2InvalidateDrawable(brw
->driContext
->driReadablePriv
);
88 intelInitBufferFuncs(struct dd_function_table
*functions
)
90 functions
->DrawBuffer
= intelDrawBuffer
;
91 functions
->ReadBuffer
= intelReadBuffer
;