src/mesa/drivers/dri/i965/intel_buffers.c

   1 /*
   2  * Copyright 2003 VMware, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "brw_context.h"
  27 #include "intel_buffers.h"
  28 #include "intel_fbo.h"
  29 #include "intel_mipmap_tree.h"
  30
  31 #include "main/fbobject.h"
  32 #include "main/framebuffer.h"
  33 #include "main/renderbuffer.h"
  34
  35 static void
  36 intelDrawBuffer(struct gl_context *ctx)
  37 {
  38    if (_mesa_is_front_buffer_drawing(ctx->DrawBuffer)) {
  39       struct brw_context *const brw = brw_context(ctx);
  40
  41       /* If we might be front-buffer rendering on this buffer for the first
  42        * time, invalidate our DRI drawable so we'll ask for new buffers
  43        * (including the fake front) before we start rendering again.
  44        */
  45       dri2InvalidateDrawable(brw->driContext->driDrawablePriv);
  46       intel_prepare_render(brw);
  47    }
  48 }
  49
  50
  51 static void
  52 intelReadBuffer(struct gl_context * ctx, GLenum mode)
  53 {
  54    if (_mesa_is_front_buffer_reading(ctx->ReadBuffer)) {
  55       struct brw_context *const brw = brw_context(ctx);
  56
  57       /* If we might be front-buffer reading on this buffer for the first
  58        * time, invalidate our DRI drawable so we'll ask for new buffers
  59        * (including the fake front) before we start reading again.
  60        */
  61       dri2InvalidateDrawable(brw->driContext->driReadablePriv);
  62       intel_prepare_render(brw);
  63    }
  64 }
  65
  66
  67 void
  68 intelInitBufferFuncs(struct dd_function_table *functions)
  69 {
  70    functions->DrawBuffer = intelDrawBuffer;
  71    functions->ReadBuffer = intelReadBuffer;
  72 }