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feat(display): add support for frame buffer initialization with custom stride

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Signed-off-by: Cristian Stoica <cristianmarian.stoica@nxp.com>
This commit is contained in:
Cristian Stoica
2024-09-25 10:36:56 +03:00
committed by Gabor Kiss-Vamosi
parent 0f9f322733
commit 99974d46b7
2 changed files with 40 additions and 0 deletions
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25
src/display/lv_display.c
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@@ -444,6 +444,31 @@ void lv_display_set_buffers(lv_display_t * disp, void * buf1, void * buf2, uint3
lv_display_set_render_mode(disp, render_mode);
}
void lv_display_set_buffers_with_stride(lv_display_t * disp, void * buf1, void * buf2, uint32_t buf_size,
uint32_t stride, lv_display_render_mode_t render_mode)
{
LV_ASSERT_MSG(buf1 != NULL, "Null buffer");
lv_color_format_t cf = lv_display_get_color_format(disp);
uint32_t w = lv_display_get_horizontal_resolution(disp);
uint32_t h = lv_display_get_vertical_resolution(disp);
LV_ASSERT_MSG(w != 0 && h != 0, "display resolution is 0");
if(render_mode == LV_DISPLAY_RENDER_MODE_PARTIAL) {
/* for partial mode, we calculate the height based on the buf_size and stride */
h = buf_size / stride;
LV_ASSERT_MSG(h != 0, "the buffer is too small");
}
else {
LV_ASSERT_FORMAT_MSG(stride * h <= buf_size, "%s mode requires screen sized buffer(s)",
render_mode == LV_DISPLAY_RENDER_MODE_FULL ? "FULL" : "DIRECT");
}
lv_draw_buf_init(&disp->_static_buf1, w, h, cf, stride, buf1, buf_size);
lv_draw_buf_init(&disp->_static_buf2, w, h, cf, stride, buf2, buf_size);
lv_display_set_draw_buffers(disp, &disp->_static_buf1, buf2 ? &disp->_static_buf2 : NULL);
lv_display_set_render_mode(disp, render_mode);
}
void lv_display_set_render_mode(lv_display_t * disp, lv_display_render_mode_t render_mode)
{
if(disp == NULL) disp = lv_display_get_default();

15
src/display/lv_display.h
View File

@@ -239,6 +239,21 @@ int32_t lv_display_get_dpi(const lv_display_t * disp);
void lv_display_set_buffers(lv_display_t * disp, void * buf1, void * buf2, uint32_t buf_size,
lv_display_render_mode_t render_mode);
/**
* Set the frame buffers for a display, similarly to `lv_display_set_buffers`, but allow
* for a custom stride as required by a display controller.
* This allows the frame buffers to have a stride alignment different from the rest of
* the buffers`
* @param disp pointer to a display
* @param buf1 first buffer
* @param buf2 second buffer (can be `NULL`)
* @param buf_size buffer size in byte
* @param stride buffer stride in bytes
* @param render_mode LV_DISPLAY_RENDER_MODE_PARTIAL/DIRECT/FULL
*/
void lv_display_set_buffers_with_stride(lv_display_t * disp, void * buf1, void * buf2, uint32_t buf_size,
uint32_t stride, lv_display_render_mode_t render_mode);
/**
* Set the buffers for a display, accept a draw buffer pointer.
* Normally use `lv_display_set_buffers` is enough for most cases.