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chore(examples): use draw buffer for canvas

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Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>
This commit is contained in:
Xu Xingliang
2023-12-17 16:14:33 +08:00
committed by Gabor Kiss-Vamosi
parent 3ff5f97651
commit 8af0cfa7aa
8 changed files with 21 additions and 31 deletions
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23
examples/widgets/canvas/lv_example_canvas_1.c
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@@ -27,10 +27,10 @@ void lv_example_canvas_1(void)
label_dsc.color = lv_palette_main(LV_PALETTE_ORANGE);
label_dsc.text = "Some text on text canvas";
/*Create a buffer for the canvas*/
static uint8_t cbuf[LV_CANVAS_BUF_SIZE(CANVAS_WIDTH, CANVAS_HEIGHT, 16, LV_DRAW_BUF_STRIDE_ALIGN)];
LV_DRAW_BUF_DEFINE(draw_buf_16bpp, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_RGB565);
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());
lv_canvas_set_buffer(canvas, cbuf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_RGB565);
lv_canvas_set_draw_buf(canvas, &draw_buf_16bpp);
lv_obj_center(canvas);
lv_canvas_fill_bg(canvas, lv_palette_lighten(LV_PALETTE_GREY, 3), LV_OPA_COVER);
@@ -46,26 +46,19 @@ void lv_example_canvas_1(void)
lv_canvas_finish_layer(canvas, &layer);
/*Test the rotation. It requires another buffer where the original image is stored.
*So copy the current image to buffer and rotate it to the canvas*/
static uint8_t cbuf_tmp[LV_CANVAS_BUF_SIZE(CANVAS_WIDTH, CANVAS_HEIGHT, 32, LV_DRAW_BUF_STRIDE_ALIGN)];
*So use previous canvas as image and rotate it to the new canvas*/
LV_DRAW_BUF_DEFINE(draw_buf_32bpp, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
/*Create a canvas and initialize its palette*/
canvas = lv_canvas_create(lv_screen_active());
lv_canvas_set_buffer(canvas, cbuf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
lv_canvas_set_draw_buf(canvas, &draw_buf_32bpp);
lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
lv_obj_center(canvas);
lv_memcpy(cbuf_tmp, cbuf, sizeof(cbuf_tmp));
lv_image_dsc_t img;
img.data = (void *)cbuf_tmp;
img.header.cf = LV_COLOR_FORMAT_ARGB8888;
img.header.w = CANVAS_WIDTH;
img.header.h = CANVAS_HEIGHT;
lv_canvas_finish_layer(canvas, &layer);
lv_canvas_fill_bg(canvas, lv_palette_lighten(LV_PALETTE_GREY, 1), LV_OPA_COVER);
lv_canvas_init_layer(canvas, &layer);
lv_image_dsc_t img;
lv_draw_buf_to_image(&draw_buf_16bpp, &img);
lv_draw_image_dsc_t img_dsc;
lv_draw_image_dsc_init(&img_dsc);
img_dsc.rotation = 120;

5
examples/widgets/canvas/lv_example_canvas_2.c
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@@ -12,11 +12,10 @@ void lv_example_canvas_2(void)
lv_obj_set_style_bg_color(lv_screen_active(), lv_palette_lighten(LV_PALETTE_RED, 5), 0);
/*Create a buffer for the canvas*/
static uint8_t cbuf[CANVAS_WIDTH * CANVAS_HEIGHT * 4];
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
/*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_ARGB8888);
lv_canvas_set_draw_buf(canvas, &draw_buf);
lv_obj_center(canvas);
/*Red background (There is no dedicated alpha channel in indexed images so LV_OPA_COVER is ignored)*/

5
examples/widgets/canvas/lv_example_canvas_3.c
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@@ -10,11 +10,12 @@
void lv_example_canvas_3(void)
{
/*Create a buffer for the canvas*/
static uint8_t cbuf[LV_CANVAS_BUF_SIZE(CANVAS_WIDTH, CANVAS_HEIGHT, 32, LV_DRAW_BUF_STRIDE_ALIGN)];
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
/*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_ARGB8888);
lv_canvas_set_draw_buf(canvas, &draw_buf);
lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
lv_obj_center(canvas);

4
examples/widgets/canvas/lv_example_canvas_4.c
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@@ -10,11 +10,11 @@
void lv_example_canvas_4(void)
{
/*Create a buffer for the canvas*/
static uint8_t cbuf[LV_CANVAS_BUF_SIZE(CANVAS_WIDTH, CANVAS_HEIGHT, 32, LV_DRAW_BUF_STRIDE_ALIGN)];
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
/*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_ARGB8888);
lv_canvas_set_draw_buf(canvas, &draw_buf);
lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
lv_obj_center(canvas);

4
examples/widgets/canvas/lv_example_canvas_5.c
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@@ -10,11 +10,11 @@
void lv_example_canvas_5(void)
{
/*Create a buffer for the canvas*/
static uint8_t cbuf[LV_CANVAS_BUF_SIZE(CANVAS_WIDTH, CANVAS_HEIGHT, 32, LV_DRAW_BUF_STRIDE_ALIGN)];
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
/*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_ARGB8888);
lv_canvas_set_draw_buf(canvas, &draw_buf);
lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
lv_obj_center(canvas);

3
examples/widgets/canvas/lv_example_canvas_6.c
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@@ -29,8 +29,5 @@ void lv_example_canvas_6(void)
lv_area_t coords = {10, 10, 10 + img_star.header.w - 1, 10 + img_star.header.h - 1};
lv_draw_image(&layer, &dsc, &coords);
lv_canvas_finish_layer(canvas, &layer);
}
#endif

4
examples/widgets/canvas/lv_example_canvas_7.c
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@@ -10,11 +10,11 @@
void lv_example_canvas_7(void)
{
/*Create a buffer for the canvas*/
static uint8_t cbuf[LV_CANVAS_BUF_SIZE(CANVAS_WIDTH, CANVAS_HEIGHT, 32, LV_DRAW_BUF_STRIDE_ALIGN)];
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
/*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_ARGB8888);
lv_canvas_set_draw_buf(canvas, &draw_buf);
lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
lv_obj_center(canvas);

4
examples/widgets/canvas/lv_example_canvas_8.c
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@@ -12,11 +12,11 @@
void lv_example_canvas_8(void)
{
/*Create a buffer for the canvas*/
static uint8_t cbuf[LV_CANVAS_BUF_SIZE(CANVAS_WIDTH, CANVAS_HEIGHT, 32, LV_DRAW_BUF_STRIDE_ALIGN)];
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
/*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_ARGB8888);
lv_canvas_set_draw_buf(canvas, &draw_buf);
lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
lv_obj_center(canvas);