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feat(draw_buf): add LV_DRAW_BUF_INIT macro to meet alignment requirement (#6102)

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Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>
Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
This commit is contained in:
Neo Xu 2024-05-09 05:53:28 +08:00 committed by GitHub
parent 46887dbe51
commit dfe50c5952
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GPG Key ID: B5690EEEBB952194
13 changed files with 47 additions and 24 deletions
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7
examples/widgets/canvas/lv_example_canvas_1.c
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@ -27,7 +27,8 @@ 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*/
LV_DRAW_BUF_DEFINE(draw_buf_16bpp, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_RGB565);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf_16bpp, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_RGB565);
LV_DRAW_BUF_INIT_STATIC(draw_buf_16bpp);
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());
lv_canvas_set_draw_buf(canvas, &draw_buf_16bpp);
@ -47,7 +48,9 @@ void lv_example_canvas_1(void)
/*Test the rotation. It requires another buffer where the original image is stored.
*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);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf_32bpp, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_INIT_STATIC(draw_buf_32bpp);
/*Create a canvas and initialize its palette*/
canvas = lv_canvas_create(lv_screen_active());
lv_canvas_set_draw_buf(canvas, &draw_buf_32bpp);

4
examples/widgets/canvas/lv_example_canvas_2.c
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@ -12,7 +12,9 @@ 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*/
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_INIT_STATIC(draw_buf);
/*Create a canvas and initialize its palette*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());
lv_canvas_set_draw_buf(canvas, &draw_buf);

3
examples/widgets/canvas/lv_example_canvas_3.c
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@ -10,7 +10,8 @@
void lv_example_canvas_3(void)
{
/*Create a buffer for the canvas*/
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_INIT_STATIC(draw_buf);
/*Create a canvas and initialize its palette*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());

3
examples/widgets/canvas/lv_example_canvas_4.c
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@ -10,7 +10,8 @@
void lv_example_canvas_4(void)
{
/*Create a buffer for the canvas*/
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_INIT_STATIC(draw_buf);
/*Create a canvas and initialize its palette*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());

3
examples/widgets/canvas/lv_example_canvas_5.c
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@ -10,7 +10,8 @@
void lv_example_canvas_5(void)
{
/*Create a buffer for the canvas*/
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_INIT_STATIC(draw_buf);
/*Create a canvas and initialize its palette*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());

3
examples/widgets/canvas/lv_example_canvas_7.c
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@ -10,7 +10,8 @@
void lv_example_canvas_7(void)
{
/*Create a buffer for the canvas*/
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_INIT_STATIC(draw_buf);
/*Create a canvas and initialize its palette*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());

3
examples/widgets/canvas/lv_example_canvas_8.c
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@ -12,7 +12,8 @@
void lv_example_canvas_8(void)
{
/*Create a buffer for the canvas*/
LV_DRAW_BUF_DEFINE(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
LV_DRAW_BUF_INIT_STATIC(draw_buf);
/*Create a canvas and initialize its palette*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());

13
examples/widgets/label/lv_example_label_4.c
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@ -5,11 +5,11 @@
#define MASK_WIDTH 150
#define MASK_HEIGHT 60
static void generate_mask(uint8_t * mask, int32_t w, int32_t h, const char * txt)
static void generate_mask(lv_draw_buf_t * mask, int32_t w, int32_t h, const char * txt)
{
/*Create a "8 bit alpha" canvas and clear it*/
lv_obj_t * canvas = lv_canvas_create(lv_screen_active());
lv_canvas_set_buffer(canvas, mask, w, h, LV_COLOR_FORMAT_L8);
lv_canvas_set_draw_buf(canvas, mask);
lv_canvas_fill_bg(canvas, lv_color_black(), LV_OPA_TRANSP);
lv_layer_t layer;
@ -36,11 +36,10 @@ static void generate_mask(uint8_t * mask, int32_t w, int32_t h, const char * txt
void lv_example_label_4(void)
{
/* Create the mask of a text by drawing it to a canvas*/
static uint8_t mask[MASK_WIDTH * MASK_HEIGHT];
generate_mask(mask, MASK_WIDTH, MASK_HEIGHT, "Text with gradient");
LV_DRAW_BUF_DEFINE_STATIC(mask, MASK_WIDTH, MASK_HEIGHT, LV_COLOR_FORMAT_L8);
LV_DRAW_BUF_INIT_STATIC(mask);
static lv_draw_buf_t draw_buf;
lv_draw_buf_init(&draw_buf, MASK_WIDTH, MASK_HEIGHT, LV_COLOR_FORMAT_A8, LV_STRIDE_AUTO, mask, sizeof(mask));
generate_mask(&mask, MASK_WIDTH, MASK_HEIGHT, "Text with gradient");
/* Create an object from where the text will be masked out.
* Now it's a rectangle with a gradient but it could be an image too*/
@ -50,7 +49,7 @@ void lv_example_label_4(void)
lv_obj_set_style_bg_color(grad, lv_color_hex(0xff0000), 0);
lv_obj_set_style_bg_grad_color(grad, lv_color_hex(0x0000ff), 0);
lv_obj_set_style_bg_grad_dir(grad, LV_GRAD_DIR_HOR, 0);
lv_obj_set_style_bitmap_mask_src(grad, &draw_buf, 0);
lv_obj_set_style_bitmap_mask_src(grad, &mask, 0);
}
#endif

19
src/draw/lv_draw_buf.h
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@ -44,16 +44,18 @@ typedef struct {
*/
#define _LV_DRAW_BUF_STRIDE(w, cf) \
((((w) * LV_COLOR_FORMAT_GET_BPP(cf) + 7) / 8 + (LV_DRAW_BUF_STRIDE_ALIGN) - 1) & ~((LV_DRAW_BUF_STRIDE_ALIGN) - 1))
LV_ROUND_UP(((w) * LV_COLOR_FORMAT_GET_BPP(cf) + 7) / 8, LV_DRAW_BUF_STRIDE_ALIGN)
#define _LV_DRAW_BUF_SIZE(w, h, cf) \
(_LV_DRAW_BUF_STRIDE(w, cf) * (h))
/* Allocate a slightly larger buffer, so we can adjust the start address to meet alignment */
#define _LV_DRAW_BUF_SIZE(w, h, cf) (_LV_DRAW_BUF_STRIDE(w, cf) * (h) + LV_DRAW_BUF_ALIGN)
/**
* Define a static draw buffer with the given width, height, and color format.
* Stride alignment is set to LV_DRAW_BUF_STRIDE_ALIGN.
*
* For platform that needs special buffer alignment, call LV_DRAW_BUF_INIT_STATIC.
*/
#define LV_DRAW_BUF_DEFINE(name, _w, _h, _cf) \
#define LV_DRAW_BUF_DEFINE_STATIC(name, _w, _h, _cf) \
static uint8_t buf_##name[_LV_DRAW_BUF_SIZE(_w, _h, _cf)]; \
static lv_draw_buf_t name = { \
.header = { \
@ -70,6 +72,13 @@ typedef struct {
.unaligned_data = buf_##name, \
}
#define LV_DRAW_BUF_INIT_STATIC(name) \
do { \
lv_image_header_t * header = &name.header; \
lv_draw_buf_init(&name, header->w, header->h, header->cf, header->stride, buf_##name, sizeof(buf_##name)); \
lv_draw_buf_set_flag(&name, LV_IMAGE_FLAGS_MODIFIABLE); \
} while(0)
typedef void * (*lv_draw_buf_malloc_cb)(size_t size, lv_color_format_t color_format);
typedef void (*lv_draw_buf_free_cb)(void * draw_buf);
@ -266,7 +275,7 @@ lv_draw_buf_t * lv_draw_buf_dup(const lv_draw_buf_t * draw_buf);
lv_draw_buf_t * lv_draw_buf_dup_user(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf);
/**
* Initialize a draw buf with the given buffer and parameters.
* Initialize a draw buf with the given buffer and parameters. Clear draw buffer flag to zero.
* @param draw_buf the draw buf to initialize
* @param w the buffer width in pixels
* @param h the buffer height in pixels

5
src/draw/sw/lv_draw_sw_img.c
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@ -240,7 +240,8 @@ static void img_draw_core(lv_draw_unit_t * draw_unit, const lv_draw_image_dsc_t
lv_area_t mask_area;
lv_result_t decoder_res = lv_image_decoder_open(&mask_decoder_dsc, draw_dsc->bitmap_mask_src, NULL);
if(decoder_res == LV_RESULT_OK && mask_decoder_dsc.decoded) {
if(mask_decoder_dsc.decoded->header.cf == LV_COLOR_FORMAT_A8) {
if(mask_decoder_dsc.decoded->header.cf == LV_COLOR_FORMAT_A8 ||
mask_decoder_dsc.decoded->header.cf == LV_COLOR_FORMAT_L8) {
const lv_draw_buf_t * mask_img = mask_decoder_dsc.decoded;
blend_dsc.mask_buf = mask_img->data;
blend_dsc.mask_stride = mask_img->header.stride;
@ -254,7 +255,7 @@ static void img_draw_core(lv_draw_unit_t * draw_unit, const lv_draw_image_dsc_t
blend_dsc.mask_res = LV_DRAW_SW_MASK_RES_CHANGED;
}
else {
LV_LOG_WARN("The mask image doesn'thave A8 format. Drawing the image without mask.");
LV_LOG_WARN("The mask image is not A8/L8 format. Drawing the image without mask.");
}
}
else {

2
src/lv_api_map_v9_0.h
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@ -39,6 +39,8 @@ extern "C" {
#define lv_button_bind_checked lv_obj_bind_checked
#define LV_DRAW_BUF_DEFINE LV_DRAW_BUF_DEFINE_STATIC
/**********************
* MACROS
**********************/

2
src/widgets/canvas/lv_canvas.h
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@ -68,7 +68,7 @@ void lv_canvas_set_buffer(lv_obj_t * obj, void * buf, int32_t w, int32_t h, lv_c
/**
* Set a draw buffer for the canvas. A draw buffer either can be allocated by `lv_draw_buf_create()`
* or defined statically by `LV_DRAW_BUF_DEFINE`. When buffer start address and stride has alignment
* or defined statically by `LV_DRAW_BUF_DEFINE_STATIC`. When buffer start address and stride has alignment
* requirement, it's recommended to use `lv_draw_buf_create`.
* @param obj pointer to a canvas object
* @param draw_buf pointer to a draw buffer

4
tests/src/test_cases/widgets/test_canvas.c
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@ -28,7 +28,9 @@ void test_canvas_functions_invalidate(void)
lv_refr_now(NULL);
TEST_ASSERT(draw_counter == 0);
LV_DRAW_BUF_DEFINE(draw_buf, 100, 100, LV_COLOR_FORMAT_NATIVE);
LV_DRAW_BUF_DEFINE_STATIC(draw_buf, 100, 100, LV_COLOR_FORMAT_NATIVE);
LV_DRAW_BUF_INIT_STATIC(draw_buf);
lv_canvas_set_draw_buf(canvas, &draw_buf);
lv_refr_now(NULL);
TEST_ASSERT(draw_counter == 1);