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-rw-r--r--src/gallium/auxiliary/util/u_framebuffer.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_framebuffer.c b/src/gallium/auxiliary/util/u_framebuffer.c
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+/**************************************************************************
+ *
+ * Copyright 2009-2010 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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Framebuffer utility functions.
+ *
+ * @author Brian Paul
+ */
+
+
+#include "pipe/p_screen.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
+
+#include "util/u_memory.h"
+#include "util/u_framebuffer.h"
+
+
+/**
+ * Compare pipe_framebuffer_state objects.
+ * \return TRUE if same, FALSE if different
+ */
+boolean
+util_framebuffer_state_equal(const struct pipe_framebuffer_state *dst,
+ const struct pipe_framebuffer_state *src)
+{
+ unsigned i;
+
+ if (dst->width != src->width ||
+ dst->height != src->height)
+ return FALSE;
+
+ for (i = 0; i < Elements(src->cbufs); i++) {
+ if (dst->cbufs[i] != src->cbufs[i]) {
+ return FALSE;
+ }
+ }
+
+ if (dst->nr_cbufs != src->nr_cbufs) {
+ return FALSE;
+ }
+
+ if (dst->zsbuf != src->zsbuf) {
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+
+/**
+ * Copy framebuffer state from src to dst, updating refcounts.
+ */
+void
+util_copy_framebuffer_state(struct pipe_framebuffer_state *dst,
+ const struct pipe_framebuffer_state *src)
+{
+ unsigned i;
+
+ dst->width = src->width;
+ dst->height = src->height;
+
+ for (i = 0; i < Elements(src->cbufs); i++) {
+ pipe_surface_reference(&dst->cbufs[i], src->cbufs[i]);
+ }
+
+ dst->nr_cbufs = src->nr_cbufs;
+
+ pipe_surface_reference(&dst->zsbuf, src->zsbuf);
+}
+
+
+void
+util_unreference_framebuffer_state(struct pipe_framebuffer_state *fb)
+{
+ unsigned i;
+
+ for (i = 0; i < fb->nr_cbufs; i++) {
+ pipe_surface_reference(&fb->cbufs[i], NULL);
+ }
+
+ pipe_surface_reference(&fb->zsbuf, NULL);
+
+ fb->width = fb->height = 0;
+ fb->nr_cbufs = 0;
+}