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...commit
http://git.netsurf-browser.org/libnsfb.git/commit/f23427a39e21b1b613a5582181d8067b54aa645b
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- Log -----------------------------------------------------------------
commitdiff
http://git.netsurf-browser.org/libnsfb.git/commit/?id=f23427a39e21b1b613a5582181d8067b54aa645b
commit f23427a39e21b1b613a5582181d8067b54aa645b
Author: Michael Drake <[email protected]>
Commit: Michael Drake <[email protected]>
32bpp-xrgb8888: Optimise pixel/colour conversion.
This saves an `&` in the source, but also the compiler spots that
`(c >> 16) | (c << 16)` is a rotation.
Thanks to Adrian Lees.
diff --git a/src/plot/32bpp-xrgb8888.c b/src/plot/32bpp-xrgb8888.c
index 6f77f44..28e6673 100644
--- a/src/plot/32bpp-xrgb8888.c
+++ b/src/plot/32bpp-xrgb8888.c
@@ -66,9 +66,7 @@ static inline uint32_t colour_to_pixel(UNUSED nsfb_t *nsfb,
nsfb_colour_t c)
*/
static inline nsfb_colour_t pixel_to_colour(UNUSED nsfb_t *nsfb, uint32_t
pixel)
{
- return ((pixel & 0xFF) << 16) |
- ((pixel & 0xFF00)) |
- ((pixel & 0xFF0000) >> 16);
+ return (((pixel >> 16) | (pixel << 16)) & 0xff00ff) | (pixel & 0xff00);
}
@@ -81,7 +79,7 @@ static inline nsfb_colour_t pixel_to_colour(UNUSED nsfb_t
*nsfb, uint32_t pixel)
*/
static inline uint32_t colour_to_pixel(UNUSED nsfb_t *nsfb, nsfb_colour_t c)
{
- return ((c & 0xff0000) >> 16) | (c & 0xff00) | ((c & 0xff) << 16);
+ return (((c >> 16) | (c << 16)) & 0xff00ff) | (c & 0xff00);
}
#endif
-----------------------------------------------------------------------
Summary of changes:
src/plot/32bpp-xrgb8888.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/src/plot/32bpp-xrgb8888.c b/src/plot/32bpp-xrgb8888.c
index 6f77f44..28e6673 100644
--- a/src/plot/32bpp-xrgb8888.c
+++ b/src/plot/32bpp-xrgb8888.c
@@ -66,9 +66,7 @@ static inline uint32_t colour_to_pixel(UNUSED nsfb_t *nsfb,
nsfb_colour_t c)
*/
static inline nsfb_colour_t pixel_to_colour(UNUSED nsfb_t *nsfb, uint32_t
pixel)
{
- return ((pixel & 0xFF) << 16) |
- ((pixel & 0xFF00)) |
- ((pixel & 0xFF0000) >> 16);
+ return (((pixel >> 16) | (pixel << 16)) & 0xff00ff) | (pixel & 0xff00);
}
@@ -81,7 +79,7 @@ static inline nsfb_colour_t pixel_to_colour(UNUSED nsfb_t
*nsfb, uint32_t pixel)
*/
static inline uint32_t colour_to_pixel(UNUSED nsfb_t *nsfb, nsfb_colour_t c)
{
- return ((c & 0xff0000) >> 16) | (c & 0xff00) | ((c & 0xff) << 16);
+ return (((c >> 16) | (c << 16)) & 0xff00ff) | (c & 0xff00);
}
#endif
--
NetSurf Framebuffer library
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