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support pixel aspect ratio compensation in recalc_dimension, with PAR defined as 1:1 by default, and set to 4:5 for archos bitmap targets

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19759 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2009-01-13 14:41:29 +00:00
parent 2fbf09752d
commit 738a5643ad
7 changed files with 38 additions and 7 deletions
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20
apps/recorder/resize.c
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@ -66,24 +66,30 @@
*/
int recalc_dimension(struct dim *dst, struct dim *src)
{
/* This only looks backwards. The input image size is being pre-scaled by
* the inverse of the pixel aspect ratio, so that once the size it scaled
* to meet the output constraints, the scaled image will have appropriate
* proportions.
*/
int sw = src->width * LCD_PIXEL_ASPECT_HEIGHT;
int sh = src->height * LCD_PIXEL_ASPECT_WIDTH;
int tmp;
if (dst->width <= 0)
dst->width = LCD_WIDTH;
if (dst->height <= 0)
dst->height = LCD_HEIGHT;
#ifndef HAVE_UPSCALER
if (dst->width > src->width || dst->height > src->height)
if (dst->width > sw || dst->height > sh)
{
dst->width = src->width;
dst->height = src->height;
dst->width = sw;
dst->height = sh;
}
if (src->width == dst->width && src->height == dst->height)
if (sw == dst->width && sh == dst->height)
return 1;
#endif
tmp = (src->width * dst->height + (src->height >> 1)) / src->height;
tmp = (sw * dst->height + (sh >> 1)) / sh;
if (tmp > dst->width)
dst->height = (src->height * dst->width + (src->width >> 1))
/ src->width;
dst->height = (sh * dst->width + (sw >> 1)) / sw;
else
dst->width = tmp;
return src->width == dst->width && src->height == dst->height;