michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: display: sdl: support non-vtiled mono mode

Browse source 
Added support for writing in non-vtiled mono mode to SDL display
emulator driver.

Signed-off-by: Yishai Jaffe <yishai1999@gmail.com>
This commit is contained in:
Yishai Jaffe 2025-03-06 13:19:25 +02:00 • committed by Benjamin Cabé
commit b65f0b0fbc
2 changed files with 43 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/display/Kconfig.sdl
View file

@ -62,6 +62,14 @@ config SDL_DISPLAY_MONO_MSB_FIRST
If selected, set the MSB to represent the first pixel.
This applies when the pixel format is MONO01/MONO10.
config SDL_DISPLAY_MONO_VTILED
bool "Configure data octet representation"
default y
help
If selected, set the data octet to represent 8 pixels ordered vertically.
Otherwise, horizontally.
This applies when the pixel format is MONO01/MONO10.
config SDL_DISPLAY_TRANSPARENCY_GRID_CELL_SIZE
int "Transparency grid cell size"
default 8

51
drivers/display/display_sdl.c
View file

@ -279,24 +279,42 @@ static void sdl_display_write_mono(uint8_t *disp_buf,
one_color = 0x00FFFFFF;
}
for (tile_idx = 0U; tile_idx < desc->height/8U; ++tile_idx) {
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
byte_ptr = (const uint8_t *)buf +
((tile_idx * desc->pitch) + w_idx);
disp_buf_start = disp_buf;
for (h_idx = 0U; h_idx < 8; ++h_idx) {
if ((*byte_ptr & mono_pixel_order(h_idx)) != 0U) {
pixel = one_color;
} else {
pixel = ~one_color;
if (IS_ENABLED(CONFIG_SDL_DISPLAY_MONO_VTILED)) {
for (tile_idx = 0U; tile_idx < desc->height / 8U; ++tile_idx) {
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
byte_ptr =
(const uint8_t *)buf + ((tile_idx * desc->pitch) + w_idx);
disp_buf_start = disp_buf;
for (h_idx = 0U; h_idx < 8; ++h_idx) {
if ((*byte_ptr & mono_pixel_order(h_idx)) != 0U) {
pixel = one_color;
} else {
pixel = ~one_color;
}
*((uint32_t *)disp_buf) = pixel | 0xFF000000;
disp_buf += (desc->width * 4U);
}
*((uint32_t *)disp_buf) = pixel | 0xFF000000;
disp_buf += (desc->width * 4U);
disp_buf = disp_buf_start;
disp_buf += 4;
}
disp_buf += 7 * (desc->width * 4U);
}
} else {
for (h_idx = 0; h_idx < desc->height; h_idx++) {
for (tile_idx = 0; tile_idx < desc->width / 8; tile_idx++) {
byte_ptr = (const uint8_t *)buf +
((h_idx * desc->width / 8) + tile_idx);
for (w_idx = 0; w_idx < 8; w_idx++) {
if ((*byte_ptr & mono_pixel_order(w_idx)) != 0U) {
pixel = one_color;
} else {
pixel = ~one_color;
}
*((uint32_t *)disp_buf + w_idx) = pixel | 0xFF000000;
}
disp_buf += 8 * sizeof(uint32_t);
}
disp_buf = disp_buf_start;
disp_buf += 4;
}
disp_buf += 7 * (desc->width * 4U);
}
}
@ -669,7 +687,8 @@ static void sdl_display_get_capabilities(
PIXEL_FORMAT_BGR_565 |
PIXEL_FORMAT_L_8;
capabilities->current_pixel_format = disp_data->current_pixel_format;
capabilities->screen_info = SCREEN_INFO_MONO_VTILED |
capabilities->screen_info =
(IS_ENABLED(CONFIG_SDL_DISPLAY_MONO_VTILED) ? SCREEN_INFO_MONO_VTILED : 0) |
(IS_ENABLED(CONFIG_SDL_DISPLAY_MONO_MSB_FIRST) ? SCREEN_INFO_MONO_MSB_FIRST : 0);
}