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/*
* Copyright © 2013 ARM Limited.
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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 "../drmmode_driver.h"
#include <stddef.h>
#include <xf86drmMode.h>
#include <sys/ioctl.h>
struct drm_exynos_plane_set_zpos {
__u32 plane_id;
__s32 zpos;
};
/* Cursor dimensions
* Technically we probably don't have any size limit.. since we
* are just using an overlay... but xserver will always create
* cursor images in the max size, so don't use width/height values
* that are too big
*/
#define CURSORW (64)
#define CURSORH (64)
#define CURSORPAD (16) /* Padding added down each side of cursor image */
#define DRM_EXYNOS_PLANE_SET_ZPOS 0x06
#define DRM_IOCTL_EXYNOS_PLANE_SET_ZPOS DRM_IOWR(DRM_COMMAND_BASE + \
DRM_EXYNOS_PLANE_SET_ZPOS, struct drm_exynos_plane_set_zpos)
static int init_plane_for_cursor(int drm_fd, uint32_t plane_id)
{
struct drm_exynos_plane_set_zpos data;
data.plane_id = plane_id;
data.zpos = 1;
return ioctl(drm_fd, DRM_IOCTL_EXYNOS_PLANE_SET_ZPOS, &data);
}
/* The cursor format is ARGB so the image can be copied straight over.
* Columns of CURSORPAD blank pixels are maintained down either side
* of the destination image. This is a workaround for a bug causing
* corruption when the cursor reaches the screen edges.
*/
static void set_cursor_image(xf86CrtcPtr crtc, uint32_t *d, CARD32 *s)
{
int row;
void *dst;
const char *src_row;
char *dst_row;
dst = d;
for (row = 0; row < CURSORH; row += 1) {
/* we're operating with ARGB data (4 bytes per pixel) */
src_row = (const char *)s + row * 4 * CURSORW;
dst_row = (char *)dst + row * 4 * (CURSORW + 2 * CURSORPAD);
/* set first CURSORPAD pixels in row to 0 */
memset(dst_row, 0, (4 * CURSORPAD));
/* copy cursor image pixel row across */
memcpy(dst_row + (4 * CURSORPAD), src_row, 4 * CURSORW);
/* set last CURSORPAD pixels in row to 0 */
memset(dst_row + 4 * (CURSORPAD + CURSORW),
0, (4 * CURSORPAD));
}
}
struct drmmode_interface exynos_interface = {
0x00000001 /* dumb_scanout_flags */,
0x00000001 /* dumb_no_scanout_flags */,
1 /* use_page_flip_events */,
CURSORW /* cursor width */,
CURSORH /* cursor_height */,
CURSORPAD /* cursor padding */,
init_plane_for_cursor /* init_plane_for_cursor */,
set_cursor_image /* set cursor image */,
0 /* vblank_query_supported */,
};
struct drmmode_interface *drmmode_interface_get_implementation(int drm_fd)
{
return &exynos_interface;
}
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