+/**************************************************************************
+ *
+ * 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, 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 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 "intel_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 intel->front_buffer_dirty field to true.
+ */
+void
+intel_check_front_buffer_rendering(struct intel_context *intel)
+{
+ const struct gl_framebuffer *fb = intel->ctx.DrawBuffer;
+ if (_mesa_is_winsys_fbo(fb)) {
+ /* drawing to window system buffer */
+ if (fb->_NumColorDrawBuffers > 0) {
+ if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
+ intel->front_buffer_dirty = true;
+ }
+ }
+ }
+}
+
+static void
+intelDrawBuffer(struct gl_context * ctx, GLenum mode)
+{
+ if (_mesa_is_front_buffer_drawing(ctx->DrawBuffer)) {
+ struct intel_context *const intel = intel_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(intel->driContext->driDrawablePriv);
+ }
+
+ intel_draw_buffer(ctx);
+}
+
+
+static void
+intelReadBuffer(struct gl_context * ctx, GLenum mode)
+{
+ if (_mesa_is_front_buffer_reading(ctx->ReadBuffer)) {
+ struct intel_context *const intel = intel_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(intel->driContext->driReadablePriv);
+ }
+}
+
+
+void
+intelInitBufferFuncs(struct dd_function_table *functions)
+{
+ functions->DrawBuffer = intelDrawBuffer;
+ functions->ReadBuffer = intelReadBuffer;
+}