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feat(draw): add implements vector graphic APIs (#4528) (#4691)

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Signed-off-by: zhangjipeng <zhangjipeng@xiaomi.com>
Co-authored-by: zhangjipeng <zhangjipeng@xiaomi.com>
Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
This commit is contained in:
Zhang Ji Peng
2023-11-09 18:37:33 +08:00
committed by GitHub
parent 3bb649db7f
commit 8cf0bbb558
108 changed files with 30939 additions and 12 deletions
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6
examples/widgets/canvas/index.rst
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@@ -45,3 +45,9 @@ Draw a line to the canvas
.. lv_example:: widgets/canvas/lv_example_canvas_7
:language: c
Draw a vector graphic to the canvas
-------------------------
.. lv_example:: widgets/canvas/lv_example_canvas_8
:language: c

42
examples/widgets/canvas/lv_example_canvas_8.c Normal file
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@@ -0,0 +1,42 @@
#include "../../lv_examples.h"
#if LV_USE_CANVAS && LV_BUILD_EXAMPLES && LV_USE_VECTOR_GRAPHIC
#define CANVAS_WIDTH 150
#define CANVAS_HEIGHT 150
/**
* Draw a path to the canvas
*/
void lv_example_canvas_8(void)
{
/*Create a buffer for the canvas*/
static uint8_t cbuf[LV_CANVAS_BUF_SIZE_TRUE_COLOR(CANVAS_WIDTH, CANVAS_HEIGHT)];
/*Create a canvas and initialize its palette*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());
lv_canvas_set_buffer(canvas, cbuf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_NATIVE);
lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
lv_obj_center(canvas);
lv_layer_t layer;
lv_canvas_init_layer(canvas, &layer);
lv_vector_dsc_t * dsc = lv_vector_dsc_create(&layer);
lv_vector_path_t * path = lv_vector_path_create(LV_VECTOR_PATH_QUALITY_MEDIUM);
lv_fpoint_t pts[] = {{10, 10}, {130, 130}, {10, 130}};
lv_vector_path_move_to(path, &pts[0]);
lv_vector_path_line_to(path, &pts[1]);
lv_vector_path_line_to(path, &pts[2]);
lv_vector_path_close(path);
lv_vector_dsc_set_fill_color(dsc, lv_color_make(0x00, 0x80, 0xff));
lv_vector_dsc_add_path(dsc, path);
lv_draw_vector(dsc);
lv_vector_path_delete(path);
lv_vector_dsc_delete(dsc);
lv_canvas_finish_layer(canvas, &layer);
}
#endif