1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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 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.
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"
38 * Check if we're about to draw into the front color buffer.
39 * If so, set the brw->front_buffer_dirty field to true.
42 intel_check_front_buffer_rendering(struct brw_context
*brw
)
44 struct intel_context
*intel
= &brw
->intel
;
45 const struct gl_framebuffer
*fb
= intel
->ctx
.DrawBuffer
;
46 if (_mesa_is_winsys_fbo(fb
)) {
47 /* drawing to window system buffer */
48 if (fb
->_NumColorDrawBuffers
> 0) {
49 if (fb
->_ColorDrawBufferIndexes
[0] == BUFFER_FRONT_LEFT
) {
50 brw
->front_buffer_dirty
= true;
57 intelDrawBuffer(struct gl_context
* ctx
, GLenum mode
)
59 if (ctx
->DrawBuffer
&& _mesa_is_winsys_fbo(ctx
->DrawBuffer
)) {
60 struct brw_context
*const brw
= brw_context(ctx
);
61 struct intel_context
*const intel
= intel_context(ctx
);
62 const bool was_front_buffer_rendering
= brw
->is_front_buffer_rendering
;
64 brw
->is_front_buffer_rendering
= (mode
== GL_FRONT_LEFT
)
65 || (mode
== GL_FRONT
) || (mode
== GL_FRONT_AND_BACK
);
67 /* If we weren't front-buffer rendering before but we are now,
68 * invalidate our DRI drawable so we'll ask for new buffers
69 * (including the fake front) before we start rendering again.
71 if (!was_front_buffer_rendering
&& brw
->is_front_buffer_rendering
)
72 dri2InvalidateDrawable(intel
->driContext
->driDrawablePriv
);
78 intelReadBuffer(struct gl_context
* ctx
, GLenum mode
)
80 if (ctx
->DrawBuffer
&& _mesa_is_winsys_fbo(ctx
->DrawBuffer
)) {
81 struct brw_context
*const brw
= brw_context(ctx
);
82 struct intel_context
*const intel
= intel_context(ctx
);
83 const bool was_front_buffer_reading
= brw
->is_front_buffer_reading
;
85 brw
->is_front_buffer_reading
= mode
== GL_FRONT_LEFT
|| mode
== GL_FRONT
;
87 /* If we weren't front-buffer reading before but we are now,
88 * invalidate our DRI drawable so we'll ask for new buffers
89 * (including the fake front) before we start reading again.
91 if (!was_front_buffer_reading
&& brw
->is_front_buffer_reading
)
92 dri2InvalidateDrawable(intel
->driContext
->driReadablePriv
);
98 intelInitBufferFuncs(struct dd_function_table
*functions
)
100 functions
->DrawBuffer
= intelDrawBuffer
;
101 functions
->ReadBuffer
= intelReadBuffer
;