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feat(draw): add lv_draw_sw_rgb565_swap

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This commit is contained in:
Gabor Kiss-Vamosi 2023-11-06 15:20:16 +01:00
parent 91edcf0930
commit d4613aecbe
4 changed files with 43 additions and 5 deletions
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34
src/draw/sw/lv_draw_sw.c
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@ -239,4 +239,38 @@ static void execute_drawing(lv_draw_sw_unit_t * u)
}
void lv_draw_sw_rgb565_swap(void * buf, int32_t buf_size_px)
{
uint32_t u32_cnt = buf_size_px / 2;
uint16_t * buf16 = buf;
uint32_t * buf32 = buf;
while(u32_cnt >= 8) {
buf32[0] = ((uint32_t)(buf32[0] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[0] & 0x00ff00ff) << 8);
buf32[1] = ((uint32_t)(buf32[1] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[1] & 0x00ff00ff) << 8);
buf32[2] = ((uint32_t)(buf32[2] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[2] & 0x00ff00ff) << 8);
buf32[3] = ((uint32_t)(buf32[3] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[3] & 0x00ff00ff) << 8);
buf32[4] = ((uint32_t)(buf32[4] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[4] & 0x00ff00ff) << 8);
buf32[5] = ((uint32_t)(buf32[5] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[5] & 0x00ff00ff) << 8);
buf32[6] = ((uint32_t)(buf32[6] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[6] & 0x00ff00ff) << 8);
buf32[7] = ((uint32_t)(buf32[7] & 0xff00ff00) >> 8) + ((uint32_t)(buf32[7] & 0x00ff00ff) << 8);
buf32 += 8;
u32_cnt -= 8;
}
while(u32_cnt) {
*buf32 = ((uint32_t)(*buf32 & 0xff00ff00) >> 8) + ((uint32_t)(*buf32 & 0x00ff00ff) << 8);
buf32++;
u32_cnt--;
}
if(buf_size_px & 0x1) {
uint32_t e = buf_size_px - 1;
buf16[e] = ((buf16[e] & 0xff00) >> 8) + ((buf16[e] & 0x00ff) << 8);
}
return;
}
#endif /*LV_USE_DRAW_SW*/

9
src/draw/sw/lv_draw_sw.h
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@ -82,6 +82,15 @@ void lv_draw_sw_transform(lv_draw_unit_t * draw_unit, const lv_area_t * dest_are
int32_t src_w, int32_t src_h, int32_t src_stride,
const lv_draw_image_dsc_t * draw_dsc, const lv_draw_image_sup_t * sup, lv_color_format_t cf, void * dest_buf);
/**
* Swap the upper and lower byte of an RGB565 buffer.
* Might be required if a 8bit parallel port or an SPI port send the bytes in the wrong order.
* The bytes will be swapped in place.
* @param buf_size_px number of pixels in the buffer
*/
void lv_draw_sw_rgb565_swap(void * buf, int32_t buf_size_px);
/***********************
* GLOBAL VARIABLES
***********************/

2
src/misc/lv_color.c
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@ -44,8 +44,6 @@ const lv_color_filter_dsc_t lv_color_filter_shade = {.filter_cb = lv_color_filte
uint8_t lv_color_format_get_bpp(lv_color_format_t cf)
{
switch(cf) {
case LV_COLOR_FORMAT_NATIVE_REVERSED:
return LV_COLOR_DEPTH / 8;
case LV_COLOR_FORMAT_I1:
case LV_COLOR_FORMAT_A1:
return 1;

3
src/misc/lv_color.h
View File

@ -117,9 +117,6 @@ enum _lv_color_format_t {
LV_COLOR_FORMAT_ARGB8888 = 0x10,
LV_COLOR_FORMAT_XRGB8888 = 0x11,
/*Miscellaneous formats*/
LV_COLOR_FORMAT_NATIVE_REVERSED = 0x1A,
/*Formats not supported by software renderer but kept here so GPU can use it*/
LV_COLOR_FORMAT_A1 = 0x0B,
LV_COLOR_FORMAT_A2 = 0x0C,