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Diffstat (limited to 'src/gallium/drivers/softpipe/sp_surface.c')
-rw-r--r--src/gallium/drivers/softpipe/sp_surface.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_surface.c b/src/gallium/drivers/softpipe/sp_surface.c
new file mode 100644
index 00000000000..389aceb27ce
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_surface.c
@@ -0,0 +1,156 @@
+/**************************************************************************
+ *
+ * Copyright 2007 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 "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_winsys.h"
+#include "util/u_tile.h"
+#include "util/u_rect.h"
+#include "sp_context.h"
+#include "sp_surface.h"
+
+
+
+/**
+ * Copy a rectangular region from one surface to another.
+ * Surfaces must have same bpp.
+ *
+ * Note that it's always the case that Y=0=top of the raster.
+ * If do_flip is non-zero, the region being copied will be flipped vertically.
+ *
+ * Assumes all values are within bounds -- no checking at this level -
+ * do it higher up if required.
+ */
+static void
+sp_surface_copy(struct pipe_context *pipe,
+ boolean do_flip,
+ struct pipe_surface *dst,
+ unsigned dstx, unsigned dsty,
+ struct pipe_surface *src,
+ unsigned srcx, unsigned srcy, unsigned width, unsigned height)
+{
+ void *dst_map = pipe->screen->surface_map( pipe->screen,
+ dst,
+ PIPE_BUFFER_USAGE_CPU_WRITE );
+
+ const void *src_map = pipe->screen->surface_map( pipe->screen,
+ src,
+ PIPE_BUFFER_USAGE_CPU_READ );
+
+ assert(dst->block.size == src->block.size);
+ assert(dst->block.width == src->block.width);
+ assert(dst->block.height == src->block.height);
+ assert(src_map);
+ assert(dst_map);
+
+ /* If do_flip, invert src_y position and pass negative src stride */
+ pipe_copy_rect(dst_map,
+ &dst->block,
+ dst->stride,
+ dstx, dsty,
+ width, height,
+ src_map,
+ do_flip ? -(int) src->stride : src->stride,
+ srcx, srcy);
+
+ pipe->screen->surface_unmap(pipe->screen, src);
+ pipe->screen->surface_unmap(pipe->screen, dst);
+}
+
+
+static void *
+get_pointer(struct pipe_surface *dst, void *dst_map, unsigned x, unsigned y)
+{
+ return (char *)dst_map + y / dst->block.height * dst->stride + x / dst->block.width * dst->block.size;
+}
+
+
+#define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
+
+
+/**
+ * Fill a rectangular sub-region. Need better logic about when to
+ * push buffers into AGP - will currently do so whenever possible.
+ */
+static void
+sp_surface_fill(struct pipe_context *pipe,
+ struct pipe_surface *dst,
+ unsigned dstx, unsigned dsty,
+ unsigned width, unsigned height, unsigned value)
+{
+ unsigned i, j;
+ void *dst_map = pipe->screen->surface_map( pipe->screen,
+ dst,
+ PIPE_BUFFER_USAGE_CPU_WRITE );
+
+ assert(dst->stride > 0);
+
+
+ switch (dst->block.size) {
+ case 1:
+ case 2:
+ case 4:
+ pipe_fill_rect(dst_map, &dst->block, dst->stride, dstx, dsty, width, height, value);
+ break;
+ case 8:
+ {
+ /* expand the 4-byte clear value to an 8-byte value */
+ ushort *row = (ushort *) get_pointer(dst, dst_map, dstx, dsty);
+ ushort val0 = UBYTE_TO_USHORT((value >> 0) & 0xff);
+ ushort val1 = UBYTE_TO_USHORT((value >> 8) & 0xff);
+ ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
+ ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
+ val0 = (val0 << 8) | val0;
+ val1 = (val1 << 8) | val1;
+ val2 = (val2 << 8) | val2;
+ val3 = (val3 << 8) | val3;
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < width; j++) {
+ row[j*4+0] = val0;
+ row[j*4+1] = val1;
+ row[j*4+2] = val2;
+ row[j*4+3] = val3;
+ }
+ row += dst->stride/2;
+ }
+ }
+ break;
+ default:
+ assert(0);
+ break;
+ }
+
+ pipe->screen->surface_unmap(pipe->screen, dst);
+}
+
+
+void
+sp_init_surface_functions(struct softpipe_context *sp)
+{
+ sp->pipe.surface_copy = sp_surface_copy;
+ sp->pipe.surface_fill = sp_surface_fill;
+}