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/*
* Copyright 2003 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "brw_context.h"
#include "intel_buffers.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"
bool
brw_is_front_buffer_reading(struct gl_framebuffer *fb)
{
if (!fb || _mesa_is_user_fbo(fb))
return false;
return fb->_ColorReadBufferIndex == BUFFER_FRONT_LEFT;
}
bool
brw_is_front_buffer_drawing(struct gl_framebuffer *fb)
{
if (!fb || _mesa_is_user_fbo(fb))
return false;
return (fb->_NumColorDrawBuffers >= 1 &&
fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT);
}
static void
intelDrawBuffer(struct gl_context * ctx, GLenum mode)
{
if (brw_is_front_buffer_drawing(ctx->DrawBuffer)) {
struct brw_context *const brw = brw_context(ctx);
/* If we might be front-buffer rendering on this buffer for the first
* time, invalidate our DRI drawable so we'll ask for new buffers
* (including the fake front) before we start rendering again.
*/
dri2InvalidateDrawable(brw->driContext->driDrawablePriv);
intel_prepare_render(brw);
}
}
static void
intelReadBuffer(struct gl_context * ctx, GLenum mode)
{
if (brw_is_front_buffer_reading(ctx->ReadBuffer)) {
struct brw_context *const brw = brw_context(ctx);
/* If we might be front-buffer reading on this buffer for the first
* time, invalidate our DRI drawable so we'll ask for new buffers
* (including the fake front) before we start reading again.
*/
dri2InvalidateDrawable(brw->driContext->driReadablePriv);
intel_prepare_render(brw);
}
}
void
intelInitBufferFuncs(struct dd_function_table *functions)
{
functions->DrawBuffer = intelDrawBuffer;
functions->ReadBuffer = intelReadBuffer;
}
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