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authorMichael Sevakis <jethead71@rockbox.org>2007-04-14 19:49:58 +0000
committerMichael Sevakis <jethead71@rockbox.org>2007-04-14 19:49:58 +0000
commitac946416060c19eb6cfe9da3d1885baee329df30 (patch)
tree89492cbefa92b63bdc8f2b8527a00d9f0c97d6d5 /firmware
parent291be034e8178add70aef054203b9a9bf2d73b07 (diff)
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e200: Use cached memory for the yuv chroma buffer. Gives some speedup. Align lcd_driver_framebuffer to the same alignment as lcd_framebuffer. The need for this became apparent when the first change cause aligment & 3 != 0 and the screen was wrapped one pixel right with a black pixel at (0, 0).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13161 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
-rw-r--r--firmware/target/arm/sandisk/sansa-e200/lcd-e200.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c b/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
index 93d79633b1..3748b73fb3 100644
--- a/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
+++ b/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
@@ -52,7 +52,8 @@
/* We don't know how to receive a DMA finished signal from the LCD controller
* To avoid problems with flickering, we double-buffer the framebuffer and turn
* off DMA while updates are taking place */
-static fb_data lcd_driver_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH];
+static fb_data lcd_driver_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH]
+ __attribute__((aligned(16))); /* Same alignment as in lcd-16bit.c */
static inline void lcd_init_gpio(void)
{
@@ -334,7 +335,7 @@ void lcd_yuv_blit(unsigned char * const src[3],
{
/* Caches for chroma data so it only need be recaculated every other
line */
- unsigned char chroma_buf[LCD_HEIGHT/2*3]; /* 480 bytes */
+ static unsigned char chroma_buf[LCD_HEIGHT/2*3]; /* 330 bytes */
unsigned char const * yuv_src[3];
off_t z;