diff options
Diffstat (limited to 'src/libs/lvgl/src/lv_widgets/lv_canvas.c')
| m--------- | src/libs/lvgl | 0 | ||||
| -rw-r--r-- | src/libs/lvgl/src/lv_widgets/lv_canvas.c | 1235 |
2 files changed, 1235 insertions, 0 deletions
diff --git a/src/libs/lvgl b/src/libs/lvgl deleted file mode 160000 -Subproject 23430cf20e32294549fff9b2879a9466dacc19b diff --git a/src/libs/lvgl/src/lv_widgets/lv_canvas.c b/src/libs/lvgl/src/lv_widgets/lv_canvas.c new file mode 100644 index 0000000..a5ecf79 --- /dev/null +++ b/src/libs/lvgl/src/lv_widgets/lv_canvas.c @@ -0,0 +1,1235 @@ +/** + * @file lv_canvas.c + * + */ + +/********************* + * INCLUDES + *********************/ +#include <stdlib.h> +#include "lv_canvas.h" +#include "../lv_misc/lv_debug.h" +#include "../lv_misc/lv_math.h" +#include "../lv_draw/lv_draw.h" +#include "../lv_core/lv_refr.h" +#include "../lv_themes/lv_theme.h" + +#if LV_USE_CANVAS != 0 + +/********************* + * DEFINES + *********************/ +#define LV_OBJX_NAME "lv_canvas" + +/********************** + * TYPEDEFS + **********************/ + +/********************** + * STATIC PROTOTYPES + **********************/ +static lv_res_t lv_canvas_signal(lv_obj_t * canvas, lv_signal_t sign, void * param); +static void set_set_px_cb(lv_disp_drv_t * disp_drv, lv_img_cf_t cf); + +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_signal_cb_t ancestor_signal; +static lv_design_cb_t ancestor_design; + +/********************** + * MACROS + **********************/ + +/********************** + * GLOBAL FUNCTIONS + **********************/ + +/** + * Create a canvas object + * @param par pointer to an object, it will be the parent of the new canvas + * @param copy pointer to a canvas object, if not NULL then the new object will be copied from it + * @return pointer to the created canvas + */ +lv_obj_t * lv_canvas_create(lv_obj_t * par, const lv_obj_t * copy) +{ + LV_LOG_TRACE("canvas create started"); + + /*Create the ancestor of canvas*/ + lv_obj_t * new_canvas = lv_img_create(par, copy); + LV_ASSERT_MEM(new_canvas); + if(new_canvas == NULL) return NULL; + + /*Allocate the canvas type specific extended data*/ + lv_canvas_ext_t * ext = lv_obj_allocate_ext_attr(new_canvas, sizeof(lv_canvas_ext_t)); + LV_ASSERT_MEM(ext); + if(ext == NULL) { + lv_obj_del(new_canvas); + return NULL; + } + + if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_cb(new_canvas); + if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_cb(new_canvas); + + /*Initialize the allocated 'ext' */ + ext->dsc.header.always_zero = 0; + ext->dsc.header.cf = LV_IMG_CF_TRUE_COLOR; + ext->dsc.header.h = 0; + ext->dsc.header.w = 0; + ext->dsc.data_size = 0; + ext->dsc.data = NULL; + + lv_img_set_src(new_canvas, &ext->dsc); + + /*The signal and design functions are not copied so set them here*/ + lv_obj_set_signal_cb(new_canvas, lv_canvas_signal); + + /*Init the new canvas canvas*/ + if(copy == NULL) { + lv_theme_apply(new_canvas, LV_THEME_CANVAS); + } + /*Copy an existing canvas*/ + else { + /*Do not copy the image data because each canvas needs it's own buffer*/ + + } + + LV_LOG_INFO("canvas created"); + + return new_canvas; +} + +/*===================== + * Setter functions + *====================*/ + +/** + * Set a buffer for the canvas. + * @param buf a buffer where the content of the canvas will be. + * The required size is (lv_img_color_format_get_px_size(cf) * w * h) / 8) + * It can be allocated with `lv_mem_alloc()` or + * it can be statically allocated array (e.g. static lv_color_t buf[100*50]) or + * it can be an address in RAM or external SRAM + * @param canvas pointer to a canvas object + * @param w width of the canvas + * @param h height of the canvas + * @param cf color format. The following formats are supported: + * LV_IMG_CF_TRUE_COLOR, LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED, LV_IMG_CF_INDEXES_1/2/4/8BIT + * + */ +void lv_canvas_set_buffer(lv_obj_t * canvas, void * buf, lv_coord_t w, lv_coord_t h, lv_img_cf_t cf) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + LV_ASSERT_NULL(buf); + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + + ext->dsc.header.cf = cf; + ext->dsc.header.w = w; + ext->dsc.header.h = h; + ext->dsc.data = buf; + + lv_img_set_src(canvas, &ext->dsc); +} + +/** + * Set the color of a pixel on the canvas + * @param canvas pointer to canvas object + * @param x x coordinate of the point to set + * @param y x coordinate of the point to set + * @param c color of the point + */ +void lv_canvas_set_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t c) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + + lv_img_buf_set_px_color(&ext->dsc, x, y, c); + lv_obj_invalidate(canvas); +} + +/** + * Set the palette color of a canvas with index format. Valid only for `LV_IMG_CF_INDEXED1/2/4/8` + * @param canvas pointer to canvas object + * @param id the palette color to set: + * - for `LV_IMG_CF_INDEXED1`: 0..1 + * - for `LV_IMG_CF_INDEXED2`: 0..3 + * - for `LV_IMG_CF_INDEXED4`: 0..15 + * - for `LV_IMG_CF_INDEXED8`: 0..255 + * @param c the color to set + */ +void lv_canvas_set_palette(lv_obj_t * canvas, uint8_t id, lv_color_t c) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + + lv_img_buf_set_palette(&ext->dsc, id, c); + lv_obj_invalidate(canvas); +} + +/*===================== + * Getter functions + *====================*/ + +/** + * Get the color of a pixel on the canvas + * @param canvas + * @param x x coordinate of the point to set + * @param y x coordinate of the point to set + * @return color of the point + */ +lv_color_t lv_canvas_get_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + lv_color_t color = lv_obj_get_style_image_recolor(canvas, LV_CANVAS_PART_MAIN); + + return lv_img_buf_get_px_color(&ext->dsc, x, y, color); +} + +/** + * Get the image of the canvas as a pointer to an `lv_img_dsc_t` variable. + * @param canvas pointer to a canvas object + * @return pointer to the image descriptor. + */ +lv_img_dsc_t * lv_canvas_get_img(lv_obj_t * canvas) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + + return &ext->dsc; +} + +/*===================== + * Other functions + *====================*/ + +/** + * Copy a buffer to the canvas + * @param canvas pointer to a canvas object + * @param to_copy buffer to copy. The color format has to match with the canvas's buffer color + * format + * @param w width of the buffer to copy + * @param h height of the buffer to copy + * @param x left side of the destination position + * @param y top side of the destination position + */ +void lv_canvas_copy_buf(lv_obj_t * canvas, const void * to_copy, lv_coord_t x, lv_coord_t y, lv_coord_t w, lv_coord_t h) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + LV_ASSERT_NULL(to_copy); + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + if(x + w >= (lv_coord_t)ext->dsc.header.w || y + h >= (lv_coord_t)ext->dsc.header.h) { + LV_LOG_WARN("lv_canvas_copy_buf: x or y out of the canvas"); + return; + } + + uint32_t px_size = lv_img_cf_get_px_size(ext->dsc.header.cf) >> 3; + uint32_t px = ext->dsc.header.w * y * px_size + x * px_size; + uint8_t * to_copy8 = (uint8_t *)to_copy; + lv_coord_t i; + for(i = 0; i < h; i++) { + _lv_memcpy((void *)&ext->dsc.data[px], to_copy8, w * px_size); + px += ext->dsc.header.w * px_size; + to_copy8 += w * px_size; + } +} + +/** + * Transform and image and store the result on a canvas. + * @param canvas pointer to a canvas object to store the result of the transformation. + * @param img pointer to an image descriptor to transform. + * Can be the image descriptor of an other canvas too (`lv_canvas_get_img()`). + * @param angle the angle of rotation (0..3600), 0.1 deg resolution + * @param zoom zoom factor (256 no zoom); + * @param offset_x offset X to tell where to put the result data on destination canvas + * @param offset_y offset X to tell where to put the result data on destination canvas + * @param pivot_x pivot X of rotation. Relative to the source canvas + * Set to `source width / 2` to rotate around the center + * @param pivot_y pivot Y of rotation. Relative to the source canvas + * Set to `source height / 2` to rotate around the center + * @param antialias apply anti-aliasing during the transformation. Looks better but slower. + */ +void lv_canvas_transform(lv_obj_t * canvas, lv_img_dsc_t * img, int16_t angle, uint16_t zoom, lv_coord_t offset_x, + lv_coord_t offset_y, + int32_t pivot_x, int32_t pivot_y, bool antialias) +{ +#if LV_USE_IMG_TRANSFORM + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + LV_ASSERT_NULL(img); + + lv_canvas_ext_t * ext_dst = lv_obj_get_ext_attr(canvas); + lv_color_t color = lv_obj_get_style_image_recolor(canvas, LV_CANVAS_PART_MAIN); + + int32_t dest_width = ext_dst->dsc.header.w; + int32_t dest_height = ext_dst->dsc.header.h; + + int32_t x; + int32_t y; + bool ret; + + lv_img_transform_dsc_t dsc; + dsc.cfg.angle = angle; + dsc.cfg.zoom = zoom; + dsc.cfg.src = img->data; + dsc.cfg.src_w = img->header.w; + dsc.cfg.src_h = img->header.h; + dsc.cfg.cf = img->header.cf; + dsc.cfg.pivot_x = pivot_x; + dsc.cfg.pivot_y = pivot_y; + dsc.cfg.color = color; + dsc.cfg.antialias = antialias; + _lv_img_buf_transform_init(&dsc); + + for(y = -offset_y; y < dest_height - offset_y; y++) { + for(x = -offset_x; x < dest_width - offset_x; x++) { + + ret = _lv_img_buf_transform(&dsc, x, y); + + if(ret == false) continue; + + if(x + offset_x >= 0 && x + offset_x < dest_width && y + offset_y >= 0 && y + offset_y < dest_height) { + /*If the image has no alpha channel just simple set the result color on the canvas*/ + if(lv_img_cf_has_alpha(img->header.cf) == false) { + lv_img_buf_set_px_color(&ext_dst->dsc, x + offset_x, y + offset_y, dsc.res.color); + } + else { + lv_color_t bg_color = lv_img_buf_get_px_color(&ext_dst->dsc, x + offset_x, y + offset_y, dsc.cfg.color); + + /*If the canvas has no alpha but the image has mix the image's color with + * canvas*/ + if(lv_img_cf_has_alpha(ext_dst->dsc.header.cf) == false) { + if(dsc.res.opa < LV_OPA_MAX) dsc.res.color = lv_color_mix(dsc.res.color, bg_color, dsc.res.opa); + lv_img_buf_set_px_color(&ext_dst->dsc, x + offset_x, y + offset_y, dsc.res.color); + } + /*Both the image and canvas has alpha channel. Some extra calculation is + required*/ + else { + lv_opa_t bg_opa = lv_img_buf_get_px_alpha(&ext_dst->dsc, x + offset_x, y + offset_y); + /* Pick the foreground if it's fully opaque or the Background is fully + * transparent*/ + if(dsc.res.opa >= LV_OPA_MAX || bg_opa <= LV_OPA_MIN) { + lv_img_buf_set_px_color(&ext_dst->dsc, x + offset_x, y + offset_y, dsc.res.color); + lv_img_buf_set_px_alpha(&ext_dst->dsc, x + offset_x, y + offset_y, dsc.res.opa); + } + /*Opaque background: use simple mix*/ + else if(bg_opa >= LV_OPA_MAX) { + lv_img_buf_set_px_color(&ext_dst->dsc, x + offset_x, y + offset_y, + lv_color_mix(dsc.res.color, bg_color, dsc.res.opa)); + } + /*Both colors have alpha. Expensive calculation need to be applied*/ + else { + + /*Info: + * https://en.wikipedia.org/wiki/Alpha_compositing#Analytical_derivation_of_the_over_operator*/ + lv_opa_t opa_res_2 = 255 - ((uint16_t)((uint16_t)(255 - dsc.res.opa) * (255 - bg_opa)) >> 8); + if(opa_res_2 == 0) { + opa_res_2 = 1; /*never happens, just to be sure*/ + } + lv_opa_t ratio = (uint16_t)((uint16_t)dsc.res.opa * 255) / opa_res_2; + + lv_img_buf_set_px_color(&ext_dst->dsc, x + offset_x, y + offset_y, + lv_color_mix(dsc.res.color, bg_color, ratio)); + lv_img_buf_set_px_alpha(&ext_dst->dsc, x + offset_x, y + offset_y, opa_res_2); + } + } + } + } + } + } + + lv_obj_invalidate(canvas); +#else + LV_UNUSED(canvas); + LV_UNUSED(img); + LV_UNUSED(angle); + LV_UNUSED(zoom); + LV_UNUSED(offset_x); + LV_UNUSED(offset_y); + LV_UNUSED(pivot_x); + LV_UNUSED(pivot_y); + LV_UNUSED(antialias); + LV_LOG_WARN("LV_USE_IMG_TRANSFORM is disabled in lv_conf.h"); +#endif +} + +/** + * Apply horizontal blur on the canvas + * @param canvas pointer to a canvas object + * @param area the area to blur. If `NULL` the whole canvas will be blurred. + * @param r radius of the blur + */ +void lv_canvas_blur_hor(lv_obj_t * canvas, const lv_area_t * area, uint16_t r) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + if(r == 0) return; + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + + lv_area_t a; + if(area) { + lv_area_copy(&a, area); + if(a.x1 < 0) a.x1 = 0; + if(a.y1 < 0) a.y1 = 0; + if(a.x2 > ext->dsc.header.w - 1) a.x2 = ext->dsc.header.w - 1; + if(a.y2 > ext->dsc.header.h - 1) a.y2 = ext->dsc.header.h - 1; + } + else { + a.x1 = 0; + a.y1 = 0; + a.x2 = ext->dsc.header.w - 1; + a.y2 = ext->dsc.header.h - 1; + } + + lv_color_t color = lv_obj_get_style_image_recolor(canvas, LV_CANVAS_PART_MAIN); + + uint16_t r_back = r / 2; + uint16_t r_front = r / 2; + + if((r & 0x1) == 0) r_back--; + + bool has_alpha = lv_img_cf_has_alpha(ext->dsc.header.cf); + + lv_coord_t line_w = lv_img_buf_get_img_size(ext->dsc.header.w, 1, ext->dsc.header.cf); + uint8_t * line_buf = _lv_mem_buf_get(line_w); + + lv_img_dsc_t line_img; + line_img.data = line_buf; + line_img.header.always_zero = 0; + line_img.header.w = ext->dsc.header.w; + line_img.header.h = 1; + line_img.header.cf = ext->dsc.header.cf; + + lv_coord_t x; + lv_coord_t y; + lv_coord_t x_safe; + + for(y = a.y1; y <= a.y2; y++) { + uint32_t asum = 0; + uint32_t rsum = 0; + uint32_t gsum = 0; + uint32_t bsum = 0; + + lv_color_t c; + lv_opa_t opa = LV_OPA_TRANSP; + _lv_memcpy(line_buf, &ext->dsc.data[y * line_w], line_w); + + for(x = a.x1 - r_back; x <= a.x1 + r_front; x++) { + x_safe = x < 0 ? 0 : x; + x_safe = x_safe > ext->dsc.header.w - 1 ? ext->dsc.header.w - 1 : x_safe; + + c = lv_img_buf_get_px_color(&line_img, x_safe, 0, color); + if(has_alpha) opa = lv_img_buf_get_px_alpha(&line_img, x_safe, 0); + + rsum += c.ch.red; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + gsum += (c.ch.green_h << 3) + c.ch.green_l; +#else + gsum += c.ch.green; +#endif + bsum += c.ch.blue; + if(has_alpha) asum += opa; + } + + /*Just to indicate that the px is visible*/ + if(has_alpha == false) asum = LV_OPA_COVER; + + for(x = a.x1; x <= a.x2; x++) { + + if(asum) { + c.ch.red = rsum / r; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + uint8_t gtmp = gsum / r; + c.ch.green_h = gtmp >> 3; + c.ch.green_l = gtmp & 0x7; +#else + c.ch.green = gsum / r; +#endif + c.ch.blue = bsum / r; + if(has_alpha) opa = asum / r; + + lv_img_buf_set_px_color(&ext->dsc, x, y, c); + } + if(has_alpha) lv_img_buf_set_px_alpha(&ext->dsc, x, y, opa); + + x_safe = x - r_back; + x_safe = x_safe < 0 ? 0 : x_safe; + c = lv_img_buf_get_px_color(&line_img, x_safe, 0, color); + if(has_alpha) opa = lv_img_buf_get_px_alpha(&line_img, x_safe, 0); + + rsum -= c.ch.red; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + gsum -= (c.ch.green_h << 3) + c.ch.green_l; +#else + gsum -= c.ch.green; +#endif + bsum -= c.ch.blue; + if(has_alpha) asum -= opa; + + x_safe = x + 1 + r_front; + x_safe = x_safe > ext->dsc.header.w - 1 ? ext->dsc.header.w - 1 : x_safe; + c = lv_img_buf_get_px_color(&line_img, x_safe, 0, LV_COLOR_RED); + if(has_alpha) opa = lv_img_buf_get_px_alpha(&line_img, x_safe, 0); + + rsum += c.ch.red; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + gsum += (c.ch.green_h << 3) + c.ch.green_l; +#else + gsum += c.ch.green; +#endif + bsum += c.ch.blue; + if(has_alpha) asum += opa; + } + } + lv_obj_invalidate(canvas); + + _lv_mem_buf_release(line_buf); +} + +/** + * Apply vertical blur on the canvas + * @param canvas pointer to a canvas object + * @param area the area to blur. If `NULL` the whole canvas will be blurred. + * @param r radius of the blur + */ +void lv_canvas_blur_ver(lv_obj_t * canvas, const lv_area_t * area, uint16_t r) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + if(r == 0) return; + + lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); + + lv_area_t a; + if(area) { + lv_area_copy(&a, area); + if(a.x1 < 0) a.x1 = 0; + if(a.y1 < 0) a.y1 = 0; + if(a.x2 > ext->dsc.header.w - 1) a.x2 = ext->dsc.header.w - 1; + if(a.y2 > ext->dsc.header.h - 1) a.y2 = ext->dsc.header.h - 1; + } + else { + a.x1 = 0; + a.y1 = 0; + a.x2 = ext->dsc.header.w - 1; + a.y2 = ext->dsc.header.h - 1; + } + + lv_color_t color = lv_obj_get_style_image_recolor(canvas, LV_CANVAS_PART_MAIN); + + uint16_t r_back = r / 2; + uint16_t r_front = r / 2; + + if((r & 0x1) == 0) r_back--; + + bool has_alpha = lv_img_cf_has_alpha(ext->dsc.header.cf); + lv_coord_t col_w = lv_img_buf_get_img_size(1, ext->dsc.header.h, ext->dsc.header.cf); + uint8_t * col_buf = _lv_mem_buf_get(col_w); + lv_img_dsc_t line_img; + + line_img.data = col_buf; + line_img.header.always_zero = 0; + line_img.header.w = 1; + line_img.header.h = ext->dsc.header.h; + line_img.header.cf = ext->dsc.header.cf; + + lv_coord_t x; + lv_coord_t y; + lv_coord_t y_safe; + + for(x = a.x1; x <= a.x2; x++) { + uint32_t asum = 0; + uint32_t rsum = 0; + uint32_t gsum = 0; + uint32_t bsum = 0; + + lv_color_t c; + lv_opa_t opa = LV_OPA_COVER; + + for(y = a.y1 - r_back; y <= a.y1 + r_front; y++) { + y_safe = y < 0 ? 0 : y; + y_safe = y_safe > ext->dsc.header.h - 1 ? ext->dsc.header.h - 1 : y_safe; + + c = lv_img_buf_get_px_color(&ext->dsc, x, y_safe, color); + if(has_alpha) opa = lv_img_buf_get_px_alpha(&ext->dsc, x, y_safe); + + lv_img_buf_set_px_color(&line_img, 0, y_safe, c); + if(has_alpha) lv_img_buf_set_px_alpha(&line_img, 0, y_safe, opa); + + rsum += c.ch.red; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + gsum += (c.ch.green_h << 3) + c.ch.green_l; +#else + gsum += c.ch.green; +#endif + bsum += c.ch.blue; + if(has_alpha) asum += opa; + } + + /*Just to indicate that the px is visible*/ + if(has_alpha == false) asum = LV_OPA_COVER; + + for(y = a.y1; y <= a.y2; y++) { + if(asum) { + c.ch.red = rsum / r; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + uint8_t gtmp = gsum / r; + c.ch.green_h = gtmp >> 3; + c.ch.green_l = gtmp & 0x7; +#else + c.ch.green = gsum / r; +#endif + c.ch.blue = bsum / r; + if(has_alpha) opa = asum / r; + + lv_img_buf_set_px_color(&ext->dsc, x, y, c); + } + if(has_alpha) lv_img_buf_set_px_alpha(&ext->dsc, x, y, opa); + + y_safe = y - r_back; + y_safe = y_safe < 0 ? 0 : y_safe; + c = lv_img_buf_get_px_color(&line_img, 0, y_safe, color); + if(has_alpha) opa = lv_img_buf_get_px_alpha(&line_img, 0, y_safe); + + rsum -= c.ch.red; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + gsum -= (c.ch.green_h << 3) + c.ch.green_l; +#else + gsum -= c.ch.green; +#endif + bsum -= c.ch.blue; + if(has_alpha) asum -= opa; + + y_safe = y + 1 + r_front; + y_safe = y_safe > ext->dsc.header.h - 1 ? ext->dsc.header.h - 1 : y_safe; + + c = lv_img_buf_get_px_color(&ext->dsc, x, y_safe, color); + if(has_alpha) opa = lv_img_buf_get_px_alpha(&ext->dsc, x, y_safe); + + lv_img_buf_set_px_color(&line_img, 0, y_safe, c); + if(has_alpha) lv_img_buf_set_px_alpha(&line_img, 0, y_safe, opa); + + rsum += c.ch.red; +#if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP + gsum += (c.ch.green_h << 3) + c.ch.green_l; +#else + gsum += c.ch.green; +#endif + bsum += c.ch.blue; + if(has_alpha) asum += opa; + } + } + + lv_obj_invalidate(canvas); + + _lv_mem_buf_release(col_buf); +} + +/** + * Fill the canvas with color + * @param canvas pointer to a canvas + * @param color the background color + * @param opa the desired opacity + */ +void lv_canvas_fill_bg(lv_obj_t * canvas, lv_color_t color, lv_opa_t opa) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_img_dsc_t * dsc = lv_canvas_get_img(canvas); + + if(dsc->header.cf == LV_IMG_CF_INDEXED_1BIT) { + uint32_t row_byte_cnt = (dsc->header.w + 7) >> 3; + /*+8 skip the palette*/ + _lv_memset((uint8_t *)dsc->data + 8, color.full ? 0xff : 0x00, row_byte_cnt * dsc->header.h); + } + else if(dsc->header.cf == LV_IMG_CF_ALPHA_1BIT) { + uint32_t row_byte_cnt = (dsc->header.w + 7) >> 3; + _lv_memset((uint8_t *)dsc->data, opa > LV_OPA_50 ? 0xff : 0x00, row_byte_cnt * dsc->header.h); + } + else { + uint32_t x; + uint32_t y; + for(y = 0; y < dsc->header.h; y++) { + for(x = 0; x < dsc->header.w; x++) { + lv_img_buf_set_px_color(dsc, x, y, color); + lv_img_buf_set_px_alpha(dsc, x, y, opa); + } + } + } + + lv_obj_invalidate(canvas); +} + +/** + * Draw a rectangle on the canvas + * @param canvas pointer to a canvas object + * @param x left coordinate of the rectangle + * @param y top coordinate of the rectangle + * @param w width of the rectangle + * @param h height of the rectangle + * @param rect_dsc descriptor of the rectangle + */ +void lv_canvas_draw_rect(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord_t w, lv_coord_t h, + const lv_draw_rect_dsc_t * rect_dsc) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_img_dsc_t * dsc = lv_canvas_get_img(canvas); + + if(dsc->header.cf >= LV_IMG_CF_INDEXED_1BIT && dsc->header.cf <= LV_IMG_CF_INDEXED_8BIT) { + LV_LOG_WARN("lv_canvas_draw_rect: can't draw to LV_IMG_CF_INDEXED canvas"); + return; + } + + /* Create a dummy display to fool the lv_draw function. + * It will think it draws to real screen. */ + lv_area_t mask; + mask.x1 = 0; + mask.x2 = dsc->header.w - 1; + mask.y1 = 0; + mask.y2 = dsc->header.h - 1; + + lv_area_t coords; + coords.x1 = x; + coords.y1 = y; + coords.x2 = x + w - 1; + coords.y2 = y + h - 1; + + lv_disp_t disp; + _lv_memset_00(&disp, sizeof(lv_disp_t)); + + lv_disp_buf_t disp_buf; + lv_disp_buf_init(&disp_buf, (void *)dsc->data, NULL, dsc->header.w * dsc->header.h); + lv_area_copy(&disp_buf.area, &mask); + + lv_disp_drv_init(&disp.driver); + + disp.driver.buffer = &disp_buf; + disp.driver.hor_res = dsc->header.w; + disp.driver.ver_res = dsc->header.h; + + set_set_px_cb(&disp.driver, dsc->header.cf); + +#if LV_ANTIALIAS + + /*Disable anti-aliasing if drawing with transparent color to chroma keyed canvas*/ + lv_color_t ctransp = LV_COLOR_TRANSP; + if(dsc->header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED && + rect_dsc->bg_color.full == ctransp.full) { + disp.driver.antialiasing = 0; + } +#endif + + lv_disp_t * refr_ori = _lv_refr_get_disp_refreshing(); + _lv_refr_set_disp_refreshing(&disp); + + lv_draw_rect(&coords, &mask, rect_dsc); + + _lv_refr_set_disp_refreshing(refr_ori); + + lv_obj_invalidate(canvas); +} + +/** + * Draw a text on the canvas. + * @param canvas pointer to a canvas object + * @param x left coordinate of the text + * @param y top coordinate of the text + * @param max_w max width of the text. The text will be wrapped to fit into this size + * @param label_draw_dsc pointer to a valid label descriptor `lv_draw_label_dsc_t` + * @param txt text to display + * @param align align of the text (`LV_LABEL_ALIGN_LEFT/RIGHT/CENTER`) + */ +void lv_canvas_draw_text(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord_t max_w, + lv_draw_label_dsc_t * label_draw_dsc, + const char * txt, lv_label_align_t align) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_img_dsc_t * dsc = lv_canvas_get_img(canvas); + + if(dsc->header.cf >= LV_IMG_CF_INDEXED_1BIT && dsc->header.cf <= LV_IMG_CF_INDEXED_8BIT) { + LV_LOG_WARN("lv_canvas_draw_text: can't draw to LV_IMG_CF_INDEXED canvas"); + return; + } + + /* Create a dummy display to fool the lv_draw function. + * It will think it draws to real screen. */ + lv_area_t mask; + mask.x1 = 0; + mask.x2 = dsc->header.w - 1; + mask.y1 = 0; + mask.y2 = dsc->header.h - 1; + + lv_area_t coords; + coords.x1 = x; + coords.y1 = y; + coords.x2 = x + max_w - 1; + coords.y2 = dsc->header.h - 1; + + lv_disp_t disp; + _lv_memset_00(&disp, sizeof(lv_disp_t)); + + lv_disp_buf_t disp_buf; + lv_disp_buf_init(&disp_buf, (void *)dsc->data, NULL, dsc->header.w * dsc->header.h); + lv_area_copy(&disp_buf.area, &mask); + + lv_disp_drv_init(&disp.driver); + + disp.driver.buffer = &disp_buf; + disp.driver.hor_res = dsc->header.w; + disp.driver.ver_res = dsc->header.h; + + set_set_px_cb(&disp.driver, dsc->header.cf); + + lv_disp_t * refr_ori = _lv_refr_get_disp_refreshing(); + _lv_refr_set_disp_refreshing(&disp); + + lv_txt_flag_t flag; + switch(align) { + case LV_LABEL_ALIGN_LEFT: + flag = LV_TXT_FLAG_NONE; + break; + case LV_LABEL_ALIGN_RIGHT: + flag = LV_TXT_FLAG_RIGHT; + break; + case LV_LABEL_ALIGN_CENTER: + flag = LV_TXT_FLAG_CENTER; + break; + default: + flag = LV_TXT_FLAG_NONE; + break; + } + + label_draw_dsc->flag = flag; + + lv_draw_label(&coords, &mask, label_draw_dsc, txt, NULL); + + _lv_refr_set_disp_refreshing(refr_ori); + + lv_obj_invalidate(canvas); +} + +/** + * Draw an image on the canvas + * @param canvas pointer to a canvas object + * @param src image source. Can be a pointer an `lv_img_dsc_t` variable or a path an image. + * @param img_draw_dsc pointer to a valid label descriptor `lv_draw_img_dsc_t` + */ +void lv_canvas_draw_img(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, const void * src, + const lv_draw_img_dsc_t * img_draw_dsc) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_img_dsc_t * dsc = lv_canvas_get_img(canvas); + + if(dsc->header.cf >= LV_IMG_CF_INDEXED_1BIT && dsc->header.cf <= LV_IMG_CF_INDEXED_8BIT) { + LV_LOG_WARN("lv_canvas_draw_img: can't draw to LV_IMG_CF_INDEXED canvas"); + return; + } + + /* Create a dummy display to fool the lv_draw function. + * It will think it draws to real screen. */ + lv_area_t mask; + mask.x1 = 0; + mask.x2 = dsc->header.w - 1; + mask.y1 = 0; + mask.y2 = dsc->header.h - 1; + + lv_img_header_t header; + lv_res_t res = lv_img_decoder_get_info(src, &header); + if(res != LV_RES_OK) { + LV_LOG_WARN("lv_canvas_draw_img: Couldn't get the image data."); + return; + } + + lv_area_t coords; + coords.x1 = x; + coords.y1 = y; + coords.x2 = x + header.w - 1; + coords.y2 = y + header.h - 1; + + lv_disp_t disp; + _lv_memset_00(&disp, sizeof(lv_disp_t)); + + lv_disp_buf_t disp_buf; + lv_disp_buf_init(&disp_buf, (void *)dsc->data, NULL, dsc->header.w * dsc->header.h); + lv_area_copy(&disp_buf.area, &mask); + + lv_disp_drv_init(&disp.driver); + + disp.driver.buffer = &disp_buf; + disp.driver.hor_res = dsc->header.w; + disp.driver.ver_res = dsc->header.h; + + set_set_px_cb(&disp.driver, dsc->header.cf); + + lv_disp_t * refr_ori = _lv_refr_get_disp_refreshing(); + _lv_refr_set_disp_refreshing(&disp); + + lv_draw_img(&coords, &mask, src, img_draw_dsc); + + _lv_refr_set_disp_refreshing(refr_ori); + + lv_obj_invalidate(canvas); +} + +/** + * Draw a line on the canvas + * @param canvas pointer to a canvas object + * @param points point of the line + * @param point_cnt number of points + * @param line_draw_dsc pointer to an initialized `lv_draw_line_dsc_t` variable + */ +void lv_canvas_draw_line(lv_obj_t * canvas, const lv_point_t points[], uint32_t point_cnt, + const lv_draw_line_dsc_t * line_draw_dsc) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_img_dsc_t * dsc = lv_canvas_get_img(canvas); + + if(dsc->header.cf >= LV_IMG_CF_INDEXED_1BIT && dsc->header.cf <= LV_IMG_CF_INDEXED_8BIT) { + LV_LOG_WARN("lv_canvas_draw_line: can't draw to LV_IMG_CF_INDEXED canvas"); + return; + } + /* Create a dummy display to fool the lv_draw function. + * It will think it draws to real screen. */ + lv_area_t mask; + mask.x1 = 0; + mask.x2 = dsc->header.w - 1; + mask.y1 = 0; + mask.y2 = dsc->header.h - 1; + + lv_disp_t disp; + _lv_memset_00(&disp, sizeof(lv_disp_t)); + + lv_disp_buf_t disp_buf; + lv_disp_buf_init(&disp_buf, (void *)dsc->data, NULL, dsc->header.w * dsc->header.h); + lv_area_copy(&disp_buf.area, &mask); + + lv_disp_drv_init(&disp.driver); + + disp.driver.buffer = &disp_buf; + disp.driver.hor_res = dsc->header.w; + disp.driver.ver_res = dsc->header.h; + + set_set_px_cb(&disp.driver, dsc->header.cf); + +#if LV_ANTIALIAS + /*Disable anti-aliasing if drawing with transparent color to chroma keyed canvas*/ + lv_color_t ctransp = LV_COLOR_TRANSP; + if(dsc->header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED && + line_draw_dsc->color.full == ctransp.full) { + disp.driver.antialiasing = 0; + } +#endif + + lv_disp_t * refr_ori = _lv_refr_get_disp_refreshing(); + _lv_refr_set_disp_refreshing(&disp); + + uint32_t i; + for(i = 0; i < point_cnt - 1; i++) { + lv_draw_line(&points[i], &points[i + 1], &mask, line_draw_dsc); + } + + _lv_refr_set_disp_refreshing(refr_ori); + + lv_obj_invalidate(canvas); +} + +/** + * Draw a polygon on the canvas + * @param canvas pointer to a canvas object + * @param points point of the polygon + * @param point_cnt number of points + * @param poly_draw_dsc pointer to an initialized `lv_draw_rect_dsc_t` variable + */ +void lv_canvas_draw_polygon(lv_obj_t * canvas, const lv_point_t points[], uint32_t point_cnt, + const lv_draw_rect_dsc_t * poly_draw_dsc) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_img_dsc_t * dsc = lv_canvas_get_img(canvas); + + if(dsc->header.cf >= LV_IMG_CF_INDEXED_1BIT && dsc->header.cf <= LV_IMG_CF_INDEXED_8BIT) { + LV_LOG_WARN("lv_canvas_draw_polygon: can't draw to LV_IMG_CF_INDEXED canvas"); + return; + } + + /* Create a dummy display to fool the lv_draw function. + * It will think it draws to real screen. */ + lv_area_t mask; + mask.x1 = 0; + mask.x2 = dsc->header.w - 1; + mask.y1 = 0; + mask.y2 = dsc->header.h - 1; + + lv_disp_t disp; + _lv_memset_00(&disp, sizeof(lv_disp_t)); + + lv_disp_buf_t disp_buf; + lv_disp_buf_init(&disp_buf, (void *)dsc->data, NULL, dsc->header.w * dsc->header.h); + lv_area_copy(&disp_buf.area, &mask); + + lv_disp_drv_init(&disp.driver); + + disp.driver.buffer = &disp_buf; + disp.driver.hor_res = dsc->header.w; + disp.driver.ver_res = dsc->header.h; + + set_set_px_cb(&disp.driver, dsc->header.cf); + +#if LV_ANTIALIAS + /*Disable anti-aliasing if drawing with transparent color to chroma keyed canvas*/ + lv_color_t ctransp = LV_COLOR_TRANSP; + if(dsc->header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED && + poly_draw_dsc->bg_color.full == ctransp.full) { + disp.driver.antialiasing = 0; + } +#endif + + lv_disp_t * refr_ori = _lv_refr_get_disp_refreshing(); + _lv_refr_set_disp_refreshing(&disp); + + lv_draw_polygon(points, point_cnt, &mask, poly_draw_dsc); + + _lv_refr_set_disp_refreshing(refr_ori); + + lv_obj_invalidate(canvas); +} + +/** + * Draw an arc on the canvas + * @param canvas pointer to a canvas object + * @param x origo x of the arc + * @param y origo y of the arc + * @param r radius of the arc + * @param start_angle start angle in degrees + * @param end_angle end angle in degrees + * @param arc_draw_dsc pointer to an initialized `lv_draw_line_dsc_t` variable + */ +void lv_canvas_draw_arc(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord_t r, int32_t start_angle, + int32_t end_angle, const lv_draw_line_dsc_t * arc_draw_dsc) +{ + LV_ASSERT_OBJ(canvas, LV_OBJX_NAME); + + lv_img_dsc_t * dsc = lv_canvas_get_img(canvas); + + if(dsc->header.cf >= LV_IMG_CF_INDEXED_1BIT && dsc->header.cf <= LV_IMG_CF_INDEXED_8BIT) { + LV_LOG_WARN("lv_canvas_draw_arc: can't draw to LV_IMG_CF_INDEXED canvas"); + return; + } + + /* Create a dummy display to fool the lv_draw function. + * It will think it draws to real screen. */ + lv_area_t mask; + mask.x1 = 0; + mask.x2 = dsc->header.w - 1; + mask.y1 = 0; + mask.y2 = dsc->header.h - 1; + + lv_disp_t disp; + _lv_memset_00(&disp, sizeof(lv_disp_t)); + + lv_disp_buf_t disp_buf; + lv_disp_buf_init(&disp_buf, (void *)dsc->data, NULL, dsc->header.w * dsc->header.h); + lv_area_copy(&disp_buf.area, &mask); + + lv_disp_drv_init(&disp.driver); + + disp.driver.buffer = &disp_buf; + disp.driver.hor_res = dsc->header.w; + disp.driver.ver_res = dsc->header.h; + + set_set_px_cb(&disp.driver, dsc->header.cf); + +#if LV_ANTIALIAS + /*Disable anti-aliasing if drawing with transparent color to chroma keyed canvas*/ + lv_color_t ctransp = LV_COLOR_TRANSP; + if(dsc->header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED && + arc_draw_dsc->color.full == ctransp.full) { + disp.driver.antialiasing = 0; + } +#endif + + lv_disp_t * refr_ori = _lv_refr_get_disp_refreshing(); + _lv_refr_set_disp_refreshing(&disp); + + lv_draw_arc(x, y, r, start_angle, end_angle, &mask, arc_draw_dsc); + + _lv_refr_set_disp_refreshing(refr_ori); + + lv_obj_invalidate(canvas); +} + +/********************** + * STATIC FUNCTIONS + **********************/ + +/** + * Signal function of the canvas + * @param canvas pointer to a canvas object + * @param sign a signal type from lv_signal_t enum + * @param param pointer to a signal specific variable + * @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted + */ +static lv_res_t lv_canvas_signal(lv_obj_t * canvas, lv_signal_t sign, void * param) +{ + lv_res_t res; + + /* Include the ancient signal function */ + res = ancestor_signal(canvas, sign, param); + if(res != LV_RES_OK) return res; + if(sign == LV_SIGNAL_GET_TYPE) return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME); + + if(sign == LV_SIGNAL_CLEANUP) { + /*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/ + } + + return res; +} + +static void set_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 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 = LV_VER_RES_MAX; + + 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 = LV_VER_RES_MAX; + 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); +} + +#endif |