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lvgl_cpp/lvgl/hal/lv_hal_disp.c

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/**
* @file lv_hal_disp.c
*
* @description HAL layer for display driver
*
*/
/*********************
* INCLUDES
*********************/
#include <stdint.h>
#include <stddef.h>
#include "lv_hal.h"
#include "../misc/lv_mem.h"
#include "../misc/lv_gc.h"
#include "../misc/lv_assert.h"
#include "../core/lv_obj.h"
#include "../core/lv_refr.h"
#include "../core/lv_theme.h"
#include "../draw/sdl/lv_draw_sdl.h"
#include "../draw/sw/lv_draw_sw.h"
#include "../draw/sdl/lv_draw_sdl.h"
#include "../draw/stm32_dma2d/lv_gpu_stm32_dma2d.h"
#if LV_USE_THEME_DEFAULT
#include "../extra/themes/default/lv_theme_default.h"
#endif
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_obj_tree_walk_res_t invalidate_layout_cb(lv_obj_t * obj, void * user_data);
static void set_px_true_color_alpha(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x,
lv_coord_t y,
lv_color_t color, lv_opa_t opa);
static void set_px_cb_alpha1(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa);
static void set_px_cb_alpha2(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa);
static void set_px_cb_alpha4(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa);
static void set_px_cb_alpha8(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa);
static void set_px_alpha_generic(lv_img_dsc_t * d, lv_coord_t x, lv_coord_t y, lv_color_t color, lv_opa_t opa);
/**********************
* STATIC VARIABLES
**********************/
static lv_disp_t * disp_def;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Initialize a display driver with default values.
* It is used to surly have known values in the fields ant not memory junk.
* After it you can set the fields.
* @param driver pointer to driver variable to initialize
*/
void lv_disp_drv_init(lv_disp_drv_t * driver)
{
lv_memset_00(driver, sizeof(lv_disp_drv_t));
driver->hor_res = 320;
driver->ver_res = 240;
driver->physical_hor_res = -1;
driver->physical_ver_res = -1;
driver->offset_x = 0;
driver->offset_y = 0;
driver->antialiasing = LV_COLOR_DEPTH > 8 ? 1 : 0;
driver->screen_transp = LV_COLOR_SCREEN_TRANSP;
driver->dpi = LV_DPI_DEF;
driver->color_chroma_key = LV_COLOR_CHROMA_KEY;
#if LV_USE_GPU_STM32_DMA2D
driver->draw_ctx_init = lv_draw_stm32_dma2d_ctx_init;
driver->draw_ctx_deinit = lv_draw_stm32_dma2d_ctx_init;
driver->draw_ctx_size = sizeof(lv_draw_stm32_dma2d_ctx_t);
#elif LV_USE_GPU_NXP_PXP
driver->draw_ctx_init = lv_draw_nxp_pxp_init;
driver->draw_ctx_deinit = lv_draw_nxp_pxp_init;
driver->draw_ctx_size = sizeof(lv_draw_nxp_pxp_t);
#elif LV_USE_GPU_NXP_VG_LITE
driver->draw_ctx_init = lv_draw_nxp_vglite_init;
driver->draw_ctx_deinit = lv_draw_nxp_vglite_init;
driver->draw_ctx_size = sizeof(lv_draw_nxp_vglite_t);
#elif LV_USE_GPU_SDL
driver->draw_ctx_init = lv_draw_sdl_init_ctx;
driver->draw_ctx_deinit = lv_draw_sdl_deinit_ctx;
driver->draw_ctx_size = sizeof(lv_draw_sdl_ctx_t);
#else
driver->draw_ctx_init = lv_draw_sw_init_ctx;
driver->draw_ctx_deinit = lv_draw_sw_init_ctx;
driver->draw_ctx_size = sizeof(lv_draw_sw_ctx_t);
#endif
}
/**
* Initialize a display buffer
* @param draw_buf pointer `lv_disp_draw_buf_t` variable to initialize
* @param buf1 A buffer to be used by LVGL to draw the image.
* Always has to specified and can't be NULL.
* Can be an array allocated by the user. E.g. `static lv_color_t disp_buf1[1024 * 10]`
* Or a memory address e.g. in external SRAM
* @param buf2 Optionally specify a second buffer to make image rendering and image flushing
* (sending to the display) parallel.
* In the `disp_drv->flush` you should use DMA or similar hardware to send
* the image to the display in the background.
* It lets LVGL to render next frame into the other buffer while previous is being
* sent. Set to `NULL` if unused.
* @param size_in_px_cnt size of the `buf1` and `buf2` in pixel count.
*/
void lv_disp_draw_buf_init(lv_disp_draw_buf_t * draw_buf, void * buf1, void * buf2, uint32_t size_in_px_cnt)
{
lv_memset_00(draw_buf, sizeof(lv_disp_draw_buf_t));
draw_buf->buf1 = buf1;
draw_buf->buf2 = buf2;
draw_buf->buf_act = draw_buf->buf1;
draw_buf->size = size_in_px_cnt;
}
/**
* Register an initialized display driver.
* Automatically set the first display as active.
* @param driver pointer to an initialized 'lv_disp_drv_t' variable. Only its pointer is saved!
* @return pointer to the new display or NULL on error
*/
lv_disp_t * lv_disp_drv_register(lv_disp_drv_t * driver)
{
lv_disp_t * disp = _lv_ll_ins_head(&LV_GC_ROOT(_lv_disp_ll));
if(!disp) {
LV_ASSERT_MALLOC(disp);
return NULL;
}
/*Create a draw context if not created yet*/
if(driver->draw_ctx == NULL) {
lv_draw_ctx_t * draw_ctx = lv_mem_alloc(driver->draw_ctx_size);
LV_ASSERT_MALLOC(draw_ctx);
if(draw_ctx == NULL) return NULL;
driver->draw_ctx_init(driver, draw_ctx);
driver->draw_ctx = draw_ctx;
}
lv_memset_00(disp, sizeof(lv_disp_t));
disp->driver = driver;
lv_disp_t * disp_def_tmp = disp_def;
disp_def = disp; /*Temporarily change the default screen to create the default screens on the
new display*/
/*Create a refresh timer*/
disp->refr_timer = lv_timer_create(_lv_disp_refr_timer, LV_DISP_DEF_REFR_PERIOD, disp);
LV_ASSERT_MALLOC(disp->refr_timer);
if(disp->refr_timer == NULL) {
lv_mem_free(disp);
return NULL;
}
if(driver->full_refresh && driver->draw_buf->size < (uint32_t)driver->hor_res * driver->ver_res) {
driver->full_refresh = 0;
LV_LOG_WARN("full_refresh requires at least screen sized draw buffer(s)");
}
disp->bg_color = lv_color_white();
#if LV_COLOR_SCREEN_TRANSP
disp->bg_opa = LV_OPA_TRANSP;
#else
disp->bg_opa = LV_OPA_COVER;
#endif
#if LV_USE_THEME_DEFAULT
if(lv_theme_default_is_inited() == false) {
disp->theme = lv_theme_default_init(disp, lv_palette_main(LV_PALETTE_BLUE), lv_palette_main(LV_PALETTE_RED),
LV_THEME_DEFAULT_DARK, LV_FONT_DEFAULT);
}
else {
disp->theme = lv_theme_default_get();
}
#endif
disp->act_scr = lv_obj_create(NULL); /*Create a default screen on the display*/
disp->top_layer = lv_obj_create(NULL); /*Create top layer on the display*/
disp->sys_layer = lv_obj_create(NULL); /*Create sys layer on the display*/
lv_obj_remove_style_all(disp->top_layer);
lv_obj_remove_style_all(disp->sys_layer);
lv_obj_clear_flag(disp->top_layer, LV_OBJ_FLAG_CLICKABLE);
lv_obj_clear_flag(disp->sys_layer, LV_OBJ_FLAG_CLICKABLE);
lv_obj_set_scrollbar_mode(disp->top_layer, LV_SCROLLBAR_MODE_OFF);
lv_obj_set_scrollbar_mode(disp->sys_layer, LV_SCROLLBAR_MODE_OFF);
lv_obj_invalidate(disp->act_scr);
disp_def = disp_def_tmp; /*Revert the default display*/
if(disp_def == NULL) disp_def = disp; /*Initialize the default display*/
lv_timer_ready(disp->refr_timer); /*Be sure the screen will be refreshed immediately on start up*/
return disp;
}
/**
* Update the driver in run time.
* @param disp pointer to a display. (return value of `lv_disp_drv_register`)
* @param new_drv pointer to the new driver
*/
void lv_disp_drv_update(lv_disp_t * disp, lv_disp_drv_t * new_drv)
{
disp->driver = new_drv;
if(disp->driver->full_refresh &&
disp->driver->draw_buf->size < (uint32_t)disp->driver->hor_res * disp->driver->ver_res) {
disp->driver->full_refresh = 0;
LV_LOG_WARN("full_refresh requires at least screen sized draw buffer(s)");
}
lv_coord_t w = lv_disp_get_hor_res(disp);
lv_coord_t h = lv_disp_get_ver_res(disp);
uint32_t i;
for(i = 0; i < disp->screen_cnt; i++) {
lv_area_t prev_coords;
lv_obj_get_coords(disp->screens[i], &prev_coords);
lv_area_set_width(&disp->screens[i]->coords, w);
lv_area_set_height(&disp->screens[i]->coords, h);
lv_event_send(disp->screens[i], LV_EVENT_SIZE_CHANGED, &prev_coords);
}
/*
* This method is usually called upon orientation change, thus the screen is now a
* different size.
* The object invalidated its previous area. That area is now out of the screen area
* so we reset all invalidated areas and invalidate the active screen's new area only.
*/
lv_memset_00(disp->inv_areas, sizeof(disp->inv_areas));
lv_memset_00(disp->inv_area_joined, sizeof(disp->inv_area_joined));
disp->inv_p = 0;
if(disp->act_scr != NULL) lv_obj_invalidate(disp->act_scr);
lv_obj_tree_walk(NULL, invalidate_layout_cb, NULL);
if(disp->driver->drv_update_cb) disp->driver->drv_update_cb(disp->driver);
}
/**
* Remove a display
* @param disp pointer to display
*/
void lv_disp_remove(lv_disp_t * disp)
{
bool was_default = false;
if(disp == lv_disp_get_default()) was_default = true;
/*Detach the input devices*/
lv_indev_t * indev;
indev = lv_indev_get_next(NULL);
while(indev) {
if(indev->driver->disp == disp) {
indev->driver->disp = NULL;
}
indev = lv_indev_get_next(indev);
}
/** delete screen and other obj */
if(disp->sys_layer) {
lv_obj_del(disp->sys_layer);
disp->sys_layer = NULL;
}
if(disp->top_layer) {
lv_obj_del(disp->top_layer);
disp->top_layer = NULL;
}
while(disp->screen_cnt != 0) {
/*Delete the screenst*/
lv_obj_del(disp->screens[0]);
}
_lv_ll_remove(&LV_GC_ROOT(_lv_disp_ll), disp);
if(disp->refr_timer) lv_timer_del(disp->refr_timer);
lv_mem_free(disp);
if(was_default) lv_disp_set_default(_lv_ll_get_head(&LV_GC_ROOT(_lv_disp_ll)));
}
/**
* Set a default display. The new screens will be created on it by default.
* @param disp pointer to a display
*/
void lv_disp_set_default(lv_disp_t * disp)
{
disp_def = disp;
}
/**
* Get the default display
* @return pointer to the default display
*/
lv_disp_t * lv_disp_get_default(void)
{
return disp_def;
}
/**
* Get the horizontal resolution of a display
* @param disp pointer to a display (NULL to use the default display)
* @return the horizontal resolution of the display
*/
lv_coord_t lv_disp_get_hor_res(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) {
return 0;
}
else {
switch(disp->driver->rotated) {
case LV_DISP_ROT_90:
case LV_DISP_ROT_270:
return disp->driver->ver_res;
default:
return disp->driver->hor_res;
}
}
}
/**
* Get the vertical resolution of a display
* @param disp pointer to a display (NULL to use the default display)
* @return the vertical resolution of the display
*/
lv_coord_t lv_disp_get_ver_res(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) {
return 0;
}
else {
switch(disp->driver->rotated) {
case LV_DISP_ROT_90:
case LV_DISP_ROT_270:
return disp->driver->hor_res;
default:
return disp->driver->ver_res;
}
}
}
/**
* Get the full / physical horizontal resolution of a display
* @param disp pointer to a display (NULL to use the default display)
* @return the full / physical horizontal resolution of the display
*/
lv_coord_t lv_disp_get_physical_hor_res(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) {
return 0;
}
else {
switch(disp->driver->rotated) {
case LV_DISP_ROT_90:
case LV_DISP_ROT_270:
return disp->driver->physical_ver_res > 0 ? disp->driver->physical_ver_res : disp->driver->ver_res;
default:
return disp->driver->physical_hor_res > 0 ? disp->driver->physical_hor_res : disp->driver->hor_res;
}
}
}
/**
* Get the full / physical vertical resolution of a display
* @param disp pointer to a display (NULL to use the default display)
* @return the full / physical vertical resolution of the display
*/
lv_coord_t lv_disp_get_physical_ver_res(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) {
return 0;
}
else {
switch(disp->driver->rotated) {
case LV_DISP_ROT_90:
case LV_DISP_ROT_270:
return disp->driver->physical_hor_res > 0 ? disp->driver->physical_hor_res : disp->driver->hor_res;
default:
return disp->driver->physical_ver_res > 0 ? disp->driver->physical_ver_res : disp->driver->ver_res;
}
}
}
/**
* Get the horizontal offset from the full / physical display
* @param disp pointer to a display (NULL to use the default display)
* @return the horizontal offset from the full / physical display
*/
lv_coord_t lv_disp_get_offset_x(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) {
return 0;
}
else {
switch(disp->driver->rotated) {
case LV_DISP_ROT_90:
return disp->driver->offset_y;
case LV_DISP_ROT_180:
return lv_disp_get_physical_hor_res(disp) - disp->driver->offset_x;
case LV_DISP_ROT_270:
return lv_disp_get_physical_hor_res(disp) - disp->driver->offset_y;
default:
return disp->driver->offset_x;
}
}
}
/**
* Get the vertical offset from the full / physical display
* @param disp pointer to a display (NULL to use the default display)
* @return the horizontal offset from the full / physical display
*/
lv_coord_t lv_disp_get_offset_y(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) {
return 0;
}
else {
switch(disp->driver->rotated) {
case LV_DISP_ROT_90:
return disp->driver->offset_x;
case LV_DISP_ROT_180:
return lv_disp_get_physical_ver_res(disp) - disp->driver->offset_y;
case LV_DISP_ROT_270:
return lv_disp_get_physical_ver_res(disp) - disp->driver->offset_x;
default:
return disp->driver->offset_y;
}
}
}
/**
* Get if anti-aliasing is enabled for a display or not
* @param disp pointer to a display (NULL to use the default display)
* @return true: anti-aliasing is enabled; false: disabled
*/
bool lv_disp_get_antialiasing(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) return false;
return disp->driver->antialiasing ? true : false;
}
/**
* Get the DPI of the display
* @param disp pointer to a display (NULL to use the default display)
* @return dpi of the display
*/
lv_coord_t lv_disp_get_dpi(const lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) return LV_DPI_DEF; /*Do not return 0 because it might be a divider*/
return disp->driver->dpi;
}
/**
* Call in the display driver's `flush_cb` function when the flushing is finished
* @param disp_drv pointer to display driver in `flush_cb` where this function is called
*/
LV_ATTRIBUTE_FLUSH_READY void lv_disp_flush_ready(lv_disp_drv_t * disp_drv)
{
/*If the screen is transparent initialize it when the flushing is ready*/
#if LV_COLOR_SCREEN_TRANSP
if(disp_drv->screen_transp) {
if(disp_drv->clear_cb) {
disp_drv->clear_cb(disp_drv, disp_drv->draw_buf->buf_act, disp_drv->draw_buf->size);
}
else {
lv_memset_00(disp_drv->draw_buf->buf_act, disp_drv->draw_buf->size * sizeof(lv_color32_t));
}
}
#endif
disp_drv->draw_buf->flushing = 0;
disp_drv->draw_buf->flushing_last = 0;
}
/**
* Tell if it's the last area of the refreshing process.
* Can be called from `flush_cb` to execute some special display refreshing if needed when all areas area flushed.
* @param disp_drv pointer to display driver
* @return true: it's the last area to flush; false: there are other areas too which will be refreshed soon
*/
LV_ATTRIBUTE_FLUSH_READY bool lv_disp_flush_is_last(lv_disp_drv_t * disp_drv)
{
return disp_drv->draw_buf->flushing_last;
}
/**
* Get the next display.
* @param disp pointer to the current display. NULL to initialize.
* @return the next display or NULL if no more. Give the first display when the parameter is NULL
*/
lv_disp_t * lv_disp_get_next(lv_disp_t * disp)
{
if(disp == NULL)
return _lv_ll_get_head(&LV_GC_ROOT(_lv_disp_ll));
else
return _lv_ll_get_next(&LV_GC_ROOT(_lv_disp_ll), disp);
}
/**
* Get the internal buffer of a display
* @param disp pointer to a display
* @return pointer to the internal buffers
*/
lv_disp_draw_buf_t * lv_disp_get_draw_buf(lv_disp_t * disp)
{
return disp->driver->draw_buf;
}
/**
* Set the rotation of this display.
* @param disp pointer to a display (NULL to use the default display)
* @param rotation rotation angle
*/
void lv_disp_set_rotation(lv_disp_t * disp, lv_disp_rot_t rotation)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) return;
disp->driver->rotated = rotation;
lv_disp_drv_update(disp, disp->driver);
}
/**
* Get the current rotation of this display.
* @param disp pointer to a display (NULL to use the default display)
* @return rotation angle
*/
lv_disp_rot_t lv_disp_get_rotation(lv_disp_t * disp)
{
if(disp == NULL) disp = lv_disp_get_default();
if(disp == NULL) return LV_DISP_ROT_NONE;
return disp->driver->rotated;
}
void lv_disp_drv_use_generic_set_px_cb(lv_disp_drv_t * disp_drv, lv_img_cf_t cf)
{
switch(cf) {
case LV_IMG_CF_TRUE_COLOR_ALPHA:
disp_drv->set_px_cb = set_px_true_color_alpha;
break;
case LV_IMG_CF_ALPHA_1BIT:
disp_drv->set_px_cb = set_px_cb_alpha1;
break;
case LV_IMG_CF_ALPHA_2BIT:
disp_drv->set_px_cb = set_px_cb_alpha2;
break;
case LV_IMG_CF_ALPHA_4BIT:
disp_drv->set_px_cb = set_px_cb_alpha4;
break;
case LV_IMG_CF_ALPHA_8BIT:
disp_drv->set_px_cb = set_px_cb_alpha8;
break;
default:
disp_drv->set_px_cb = NULL;
}
}
/**********************
* STATIC FUNCTIONS
**********************/
static lv_obj_tree_walk_res_t invalidate_layout_cb(lv_obj_t * obj, void * user_data)
{
LV_UNUSED(user_data);
lv_obj_mark_layout_as_dirty(obj);
return LV_OBJ_TREE_WALK_NEXT;
}
static void set_px_cb_alpha1(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa)
{
(void) disp_drv; /*Unused*/
if(opa <= LV_OPA_MIN) return;
lv_img_dsc_t d;
d.data = buf;
d.header.w = buf_w;
d.header.cf = LV_IMG_CF_ALPHA_1BIT;
set_px_alpha_generic(&d, x, y, color, opa);
}
static void set_px_cb_alpha2(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa)
{
(void) disp_drv; /*Unused*/
if(opa <= LV_OPA_MIN) return;
lv_img_dsc_t d;
d.data = buf;
d.header.w = buf_w;
d.header.cf = LV_IMG_CF_ALPHA_2BIT;
set_px_alpha_generic(&d, x, y, color, opa);
}
static void set_px_cb_alpha4(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa)
{
(void) disp_drv; /*Unused*/
if(opa <= LV_OPA_MIN) return;
lv_img_dsc_t d;
d.data = buf;
d.header.w = buf_w;
d.header.cf = LV_IMG_CF_ALPHA_4BIT;
set_px_alpha_generic(&d, x, y, color, opa);
}
static void set_px_cb_alpha8(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
lv_color_t color, lv_opa_t opa)
{
(void) disp_drv; /*Unused*/
if(opa <= LV_OPA_MIN) return;
lv_img_dsc_t d;
d.data = buf;
d.header.w = buf_w;
d.header.cf = LV_IMG_CF_ALPHA_8BIT;
set_px_alpha_generic(&d, x, y, color, opa);
}
static void set_px_alpha_generic(lv_img_dsc_t * d, lv_coord_t x, lv_coord_t y, lv_color_t color, lv_opa_t opa)
{
d->header.always_zero = 0;
d->header.h = 1; /*Doesn't matter*/
uint8_t br = lv_color_brightness(color);
if(opa < LV_OPA_MAX) {
uint8_t bg = lv_img_buf_get_px_alpha(d, x, y);
br = (uint16_t)((uint16_t)br * opa + (bg * (255 - opa))) >> 8;
}
lv_img_buf_set_px_alpha(d, x, y, br);
}
static void set_px_true_color_alpha(lv_disp_drv_t * disp_drv, uint8_t * buf, lv_coord_t buf_w, lv_coord_t x,
lv_coord_t y,
lv_color_t color, lv_opa_t opa)
{
(void) disp_drv; /*Unused*/
if(opa <= LV_OPA_MIN) return;
lv_img_dsc_t d;
d.data = buf;
d.header.always_zero = 0;
d.header.h = 1; /*Doesn't matter*/;
d.header.w = buf_w;
d.header.cf = LV_IMG_CF_TRUE_COLOR_ALPHA;
lv_color_t bg_color = lv_img_buf_get_px_color(&d, x, y, lv_color_black());
lv_opa_t bg_opa = lv_img_buf_get_px_alpha(&d, x, y);
lv_opa_t res_opa;
lv_color_t res_color;
lv_color_mix_with_alpha(bg_color, bg_opa, color, opa, &res_color, &res_opa);
lv_img_buf_set_px_alpha(&d, x, y, res_opa);
lv_img_buf_set_px_color(&d, x, y, res_color);
}
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