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PictureFlow fixes and improvements:

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* Reduced popping effect (FS#8303)
* Scale the empty slide to average album width
* Introduced some visual settings
* Fix FS#8298 but make the criteria a screen height of less than 100 px so that only the c200 gets 50x50 slides

The scaling code is added as a lib function with a basic test plugin that's not compiled by default.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15913 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nicolas Pennequin 2007-12-11 18:54:50 +00:00
parent 303cf259d9
commit a7d08774dc
5 changed files with 322 additions and 66 deletions
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33
apps/plugins/lib/bmp.c
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@ -82,3 +82,36 @@ int save_bmp_file( char* filename, struct bitmap *bm, struct plugin_api* rb )
rb->close( fh );
return 1;
}
/**
Very simple image scale from src to dst (nearest neighbour).
Source and destination dimensions are read from the struct bitmap.
*/
void simple_resize_bitmap(struct bitmap *src, struct bitmap *dst)
{
const int srcw = src->width;
const int srch = src->height;
const int dstw = dst->width;
const int dsth = dst->height;
const fb_data *srcd = (fb_data*)(src->data);
const fb_data *dstd = (fb_data*)(dst->data);
const long xrstep = ((srcw-1) << 8) / (dstw-1);
const long yrstep = ((srch-1) << 8) / (dsth-1);
fb_data *src_row, *dst_row;
long xr, yr = 0;
int src_x, src_y, dst_x, dst_y;
for (dst_y=0; dst_y < dsth; dst_y++)
{
src_y = (yr >> 8);
src_row = (fb_data*)&srcd[src_y * srcw];
dst_row = (fb_data*)&dstd[dst_y * dstw];
for (xr=0,dst_x=0; dst_x < dstw; dst_x++)
{
src_x = (xr >> 8);
dst_row[dst_x] = src_row[src_x];
xr += xrstep;
}
yr += yrstep;
}
}