glamor: Add simple upload/download functions in glamor_transfer

These use glTexSubimage2D for upload and glReadPixels for
download. There are a variety of interfaces to the basic function as
needed by the callers.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 55 insertions, 0 deletions

diff --git a/glamor/glamor_transfer.h b/glamor/glamor_transfer.h
new file mode 100644
index 000000000..de8186a70
--- /dev/null
+++ b/glamor/glamor_transfer.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright © 2014 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifndef _GLAMOR_TRANSFER_H_
+#define _GLAMOR_TRANSFER_H_
+
+void
+glamor_format_for_pixmap(PixmapPtr pixmap, GLenum *format, GLenum *type);
+
+void
+glamor_upload_boxes(PixmapPtr pixmap, BoxPtr in_boxes, int in_nbox,
+                    int dx_src, int dy_src,
+                    int dx_dst, int dy_dst,
+                    uint8_t *bits, uint32_t byte_stride);
+
+void
+glamor_upload_region(PixmapPtr pixmap, RegionPtr region,
+                     int region_x, int region_y,
+                     uint8_t *bits, uint32_t byte_stride);
+
+void
+glamor_upload_pixmap(PixmapPtr pixmap);
+
+void
+glamor_download_boxes(PixmapPtr pixmap, BoxPtr in_boxes, int in_nbox,
+                      int dx_src, int dy_src,
+                      int dx_dst, int dy_dst,
+                      uint8_t *bits, uint32_t byte_stride);
+
+void
+glamor_download_rect(PixmapPtr pixmap, int x, int y, int w, int h, uint8_t *bits);
+
+void
+glamor_download_pixmap(PixmapPtr pixmap);
+
+#endif /* _GLAMOR_TRANSFER_H_ */