1/**************************************************************************
2 *
3 * Copyright 2003 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#include "intel_context.h"
29#include "intel_buffers.h"
30#include "intel_fbo.h"
31#include "intel_mipmap_tree.h"
32
33#include "main/fbobject.h"
34#include "main/framebuffer.h"
35#include "main/renderbuffer.h"
36
37/**
38 * Check if we're about to draw into the front color buffer.
39 * If so, set the intel->front_buffer_dirty field to true.
40 */
41void
42intel_check_front_buffer_rendering(struct intel_context *intel)
43{
44   const struct gl_framebuffer *fb = intel->ctx.DrawBuffer;
45   if (_mesa_is_winsys_fbo(fb)) {
46      /* drawing to window system buffer */
47      if (fb->_NumColorDrawBuffers > 0) {
48         if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
49	    intel->front_buffer_dirty = true;
50	 }
51      }
52   }
53}
54
55static void
56intelDrawBuffer(struct gl_context * ctx, GLenum mode)
57{
58   if (_mesa_is_front_buffer_drawing(ctx->DrawBuffer)) {
59      struct intel_context *const intel = intel_context(ctx);
60
61      /* If we might be front-buffer rendering on this buffer for the first
62       * time, invalidate our DRI drawable so we'll ask for new buffers
63       * (including the fake front) before we start rendering again.
64       */
65      dri2InvalidateDrawable(intel->driContext->driDrawablePriv);
66   }
67
68   intel_draw_buffer(ctx);
69}
70
71
72static void
73intelReadBuffer(struct gl_context * ctx, GLenum mode)
74{
75   if (_mesa_is_front_buffer_reading(ctx->ReadBuffer)) {
76      struct intel_context *const intel = intel_context(ctx);
77
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.
81       */
82      dri2InvalidateDrawable(intel->driContext->driReadablePriv);
83   }
84}
85
86
87void
88intelInitBufferFuncs(struct dd_function_table *functions)
89{
90   functions->DrawBuffer = intelDrawBuffer;
91   functions->ReadBuffer = intelReadBuffer;
92}
93