--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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"
+
+/**
+ * Check if we're about to draw into the front color buffer.
+ * If so, set the brw->front_buffer_dirty field to true.
+ */
+void
+intel_check_front_buffer_rendering(struct brw_context *brw)
+{
+ struct gl_context *ctx = &brw->ctx;
+ const struct gl_framebuffer *fb = ctx->DrawBuffer;
+ if (_mesa_is_winsys_fbo(fb)) {
+ /* drawing to window system buffer */
+ if (fb->_NumColorDrawBuffers > 0) {
+ if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
+ brw->front_buffer_dirty = true;
+ }
+ }
+ }
+}
+
+static void
+intelDrawBuffer(struct gl_context * ctx, GLenum mode)
+{
+ if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
+ struct brw_context *const brw = brw_context(ctx);
+ const bool was_front_buffer_rendering = brw->is_front_buffer_rendering;
+
+ brw->is_front_buffer_rendering = (mode == GL_FRONT_LEFT)
+ || (mode == GL_FRONT) || (mode == GL_FRONT_AND_BACK);
+
+ /* If we weren't front-buffer rendering before but we are now,
+ * invalidate our DRI drawable so we'll ask for new buffers
+ * (including the fake front) before we start rendering again.
+ */
+ if (!was_front_buffer_rendering && brw->is_front_buffer_rendering)
+ dri2InvalidateDrawable(brw->driContext->driDrawablePriv);
+ }
+}
+
+
+static void
+intelReadBuffer(struct gl_context * ctx, GLenum mode)
+{
+ if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
+ struct brw_context *const brw = brw_context(ctx);
+ const bool was_front_buffer_reading = brw->is_front_buffer_reading;
+
+ brw->is_front_buffer_reading = mode == GL_FRONT_LEFT || mode == GL_FRONT;
+
+ /* If we weren't front-buffer reading before but we are now,
+ * invalidate our DRI drawable so we'll ask for new buffers
+ * (including the fake front) before we start reading again.
+ */
+ if (!was_front_buffer_reading && brw->is_front_buffer_reading)
+ dri2InvalidateDrawable(brw->driContext->driReadablePriv);
+ }
+}
+
+
+void
+intelInitBufferFuncs(struct dd_function_table *functions)
+{
+ functions->DrawBuffer = intelDrawBuffer;
+ functions->ReadBuffer = intelReadBuffer;
+}