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Subject[RFC PATCH v2 04/13] bootsplash: Add corner positioning
Date
This allows showing multiple logos, each in its own position,
relative to the eight screen corners.

Signed-off-by: Max Staudt <mstaudt@suse.de>
---
drivers/video/fbdev/core/bootsplash_render.c | 136 ++++++++++++++++++++++++++-
include/uapi/linux/bootsplash_file.h | 45 ++++++++-
2 files changed, 178 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fbdev/core/bootsplash_render.c b/drivers/video/fbdev/core/bootsplash_render.c
index 8c09c306ff67..07e3a4eab811 100644
--- a/drivers/video/fbdev/core/bootsplash_render.c
+++ b/drivers/video/fbdev/core/bootsplash_render.c
@@ -155,6 +155,7 @@ void bootsplash_do_render_pictures(struct fb_info *info,
for (i = 0; i < fp->header->num_pics; i++) {
struct splash_blob_priv *bp;
struct splash_pic_priv *pp = &fp->pics[i];
+ const struct splash_pic_header *ph = pp->pic_header;
long dst_xoff, dst_yoff;

if (pp->blobs_loaded < 1)
@@ -165,8 +166,139 @@ void bootsplash_do_render_pictures(struct fb_info *info,
if (!bp || bp->blob_header->type != 0)
continue;

- dst_xoff = (info->var.xres - pp->pic_header->width) / 2;
- dst_yoff = (info->var.yres - pp->pic_header->height) / 2;
+ switch (ph->position) {
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_TOP_LEFT:
+ dst_xoff = 0;
+ dst_yoff = 0;
+
+ dst_xoff += ph->position_offset;
+ dst_yoff += ph->position_offset;
+ break;
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_TOP:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = 0;
+
+ dst_yoff += ph->position_offset;
+ break;
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_TOP_RIGHT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_yoff = 0;
+
+ dst_xoff -= ph->position_offset;
+ dst_yoff += ph->position_offset;
+ break;
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_RIGHT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff -= ph->position_offset;
+ break;
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_BOTTOM_RIGHT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+
+ dst_xoff -= ph->position_offset;
+ dst_yoff -= ph->position_offset;
+ break;
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_BOTTOM:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+
+ dst_yoff -= ph->position_offset;
+ break;
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_BOTTOM_LEFT:
+ dst_xoff = 0 + ph->position_offset;
+ dst_yoff = info->var.yres - pp->pic_header->height
+ - ph->position_offset;
+ break;
+ case SPLASH_POS_FLAG_CORNER | SPLASH_CORNER_LEFT:
+ dst_xoff = 0;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff += ph->position_offset;
+ break;
+
+ case SPLASH_CORNER_TOP_LEFT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff -= ph->position_offset;
+ dst_yoff -= ph->position_offset;
+ break;
+ case SPLASH_CORNER_TOP:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_yoff -= ph->position_offset;
+ break;
+ case SPLASH_CORNER_TOP_RIGHT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff += ph->position_offset;
+ dst_yoff -= ph->position_offset;
+ break;
+ case SPLASH_CORNER_RIGHT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff += ph->position_offset;
+ break;
+ case SPLASH_CORNER_BOTTOM_RIGHT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff += ph->position_offset;
+ dst_yoff += ph->position_offset;
+ break;
+ case SPLASH_CORNER_BOTTOM:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_yoff += ph->position_offset;
+ break;
+ case SPLASH_CORNER_BOTTOM_LEFT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff -= ph->position_offset;
+ dst_yoff += ph->position_offset;
+ break;
+ case SPLASH_CORNER_LEFT:
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+
+ dst_xoff -= ph->position_offset;
+ break;
+
+ default:
+ /* As a fallback, center the picture. */
+ dst_xoff = info->var.xres - pp->pic_header->width;
+ dst_xoff /= 2;
+ dst_yoff = info->var.yres - pp->pic_header->height;
+ dst_yoff /= 2;
+ break;
+ }

if (dst_xoff < 0
|| dst_yoff < 0
diff --git a/include/uapi/linux/bootsplash_file.h b/include/uapi/linux/bootsplash_file.h
index 89dc9cca8f0c..71cedcc68933 100644
--- a/include/uapi/linux/bootsplash_file.h
+++ b/include/uapi/linux/bootsplash_file.h
@@ -91,7 +91,32 @@ struct splash_pic_header {
*/
uint8_t num_blobs;

- uint8_t padding[27];
+ /*
+ * Corner to move the picture to / from.
+ * 0x00 - Top left
+ * 0x01 - Top
+ * 0x02 - Top right
+ * 0x03 - Right
+ * 0x04 - Bottom right
+ * 0x05 - Bottom
+ * 0x06 - Bottom left
+ * 0x07 - Left
+ *
+ * Flags:
+ * 0x10 - Calculate offset from the corner towards the center,
+ * rather than from the center towards the corner
+ */
+ uint8_t position;
+
+ /*
+ * Pixel offset from the selected position.
+ * Example: If the picture is in the top right corner, it will
+ * be placed position_offset pixels from the top and
+ * position_offset pixels from the right margin.
+ */
+ uint16_t position_offset;
+
+ uint8_t padding[24];
} __attribute__((__packed__));


@@ -115,4 +140,22 @@ struct splash_blob_header {
uint8_t padding[9];
} __attribute__((__packed__));

+
+
+
+/*
+ * Enums for on-disk types
+ */
+enum splash_position {
+ SPLASH_CORNER_TOP_LEFT = 0,
+ SPLASH_CORNER_TOP = 1,
+ SPLASH_CORNER_TOP_RIGHT = 2,
+ SPLASH_CORNER_RIGHT = 3,
+ SPLASH_CORNER_BOTTOM_RIGHT = 4,
+ SPLASH_CORNER_BOTTOM = 5,
+ SPLASH_CORNER_BOTTOM_LEFT = 6,
+ SPLASH_CORNER_LEFT = 7,
+ SPLASH_POS_FLAG_CORNER = 0x10,
+};
+
#endif
--
2.12.3
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