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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).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13161 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2007-04-14 19:49:58 +00:00
parent 291be034e8
commit ac94641606
1 changed files with 3 additions and 2 deletions
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5
firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
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@ -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;