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Merge pull request #980 from littlevgl/move_canvas

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Move lv_canvas_get_px/lv_canvas_set_px to lv_draw_img.c
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Gabor Kiss-Vamosi 2019-03-24 19:14:04 +01:00 committed by GitHub
commit 37e873fa09
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3 changed files with 155 additions and 125 deletions
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124
src/lv_draw/lv_draw_img.c
View File

@ -145,6 +145,130 @@ lv_res_t lv_img_dsc_get_info(const char * src, lv_img_header_t * header)
} }
/**
* 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_img_buf_get_px(lv_img_dsc_t *dsc, lv_coord_t x, lv_coord_t y)
{
lv_color_t p_color = LV_COLOR_BLACK;
if(x >= dsc->header.w) {
x = dsc->header.w - 1;
LV_LOG_WARN("lv_canvas_get_px: x is too large (out of canvas)");
}
else if(x < 0) {
x = 0;
LV_LOG_WARN("lv_canvas_get_px: x is < 0 (out of canvas)");
}
if(y >= dsc->header.h) {
y = dsc->header.h - 1;
LV_LOG_WARN("lv_canvas_get_px: y is too large (out of canvas)");
}
else if(y < 0) {
y = 0;
LV_LOG_WARN("lv_canvas_get_px: y is < 0 (out of canvas)");
}
uint8_t * buf_u8 = (uint8_t *) dsc->data;
if(dsc->header.cf == LV_IMG_CF_TRUE_COLOR ||
dsc->header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED)
{
uint32_t px = dsc->header.w * y * sizeof(lv_color_t) + x * sizeof(lv_color_t);
memcpy(&p_color, &buf_u8[px], sizeof(lv_color_t));
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_1BIT) {
buf_u8 += 4 * 2;
uint8_t bit = x & 0x7;
x = x >> 3;
uint32_t px = (dsc->header.w >> 3) * y + x;
p_color.full = (buf_u8[px] & (1 << (7 - bit))) >> (7 - bit);
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_2BIT) {
buf_u8 += 4 * 4;
uint8_t bit = (x & 0x3) * 2;
x = x >> 2;
uint32_t px = (dsc->header.w >> 2) * y + x;
p_color.full = (buf_u8[px] & (3 << (6 - bit))) >> (6 - bit);
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_4BIT) {
buf_u8 += 4 * 16;
uint8_t bit = (x & 0x1) * 4;
x = x >> 1;
uint32_t px = (dsc->header.w >> 1) * y + x;
p_color.full = (buf_u8[px] & (0xF << (4 - bit))) >> (4 - bit);
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_8BIT) {
buf_u8 += 4 * 256;
uint32_t px = dsc->header.w * y + x;
p_color.full = buf_u8[px];
}
return p_color;
}
/**
* Set the color of a pixel on the canvas
* @param dsc image
* @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_img_buf_set_px(lv_img_dsc_t *dsc, lv_coord_t x, lv_coord_t y, lv_color_t c)
{
uint8_t * buf_u8 = (uint8_t *) dsc->data;
if(dsc->header.cf == LV_IMG_CF_TRUE_COLOR ||
dsc->header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED)
{
uint32_t px = dsc->header.w * y * sizeof(lv_color_t) + x * sizeof(lv_color_t);
memcpy(&buf_u8[px], &c, sizeof(lv_color_t));
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_1BIT) {
buf_u8 += 4 * 2;
uint8_t bit = x & 0x7;
x = x >> 3;
uint32_t px = (dsc->header.w >> 3) * y + x;
buf_u8[px] = buf_u8[px] & ~(1 << (7 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0x1) << (7 - bit));
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_2BIT) {
buf_u8 += 4 * 4;
uint8_t bit = (x & 0x3) * 2;
x = x >> 2;
uint32_t px = (dsc->header.w >> 2) * y + x;
buf_u8[px] = buf_u8[px] & ~(3 << (6 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0x3) << (6 - bit));
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_4BIT) {
buf_u8 += 4 * 16;
uint8_t bit = (x & 0x1) * 4;
x = x >> 1;
uint32_t px = (dsc->header.w >> 1) * y + x;
buf_u8[px] = buf_u8[px] & ~(0xF << (4 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0xF) << (4 - bit));
}
else if(dsc->header.cf == LV_IMG_CF_INDEXED_8BIT) {
buf_u8 += 4 * 256;
uint32_t px = dsc->header.w * y + x;
buf_u8[px] = c.full;
}
}
uint8_t lv_img_color_format_get_px_size(lv_img_cf_t cf) uint8_t lv_img_color_format_get_px_size(lv_img_cf_t cf)
{ {
uint8_t px_size = 0; uint8_t px_size = 0;

17
src/lv_draw/lv_draw_img.h
View File

@ -154,6 +154,23 @@ bool lv_img_color_format_is_chroma_keyed(lv_img_cf_t cf);
bool lv_img_color_format_has_alpha(lv_img_cf_t cf); bool lv_img_color_format_has_alpha(lv_img_cf_t cf);
/**
* Set the color of a pixel on an image
* @param dsc image
* @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_img_buf_set_px(lv_img_dsc_t *dsc, lv_coord_t x, lv_coord_t y, lv_color_t c);
/**
* Get the color of a pixel on an image
* @param dsc image
* @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_img_buf_get_px(lv_img_dsc_t *dsc, lv_coord_t x, lv_coord_t y);
/********************** /**********************
* MACROS * MACROS

123
src/lv_objx/lv_canvas.c
View File

@ -9,6 +9,7 @@
#include <stdlib.h> #include <stdlib.h>
#include "lv_canvas.h" #include "lv_canvas.h"
#include "../lv_misc/lv_math.h" #include "../lv_misc/lv_math.h"
#include "../lv_draw/lv_draw_img.h"
#if LV_USE_CANVAS != 0 #if LV_USE_CANVAS != 0
/********************* /*********************
@ -23,7 +24,6 @@
* STATIC PROTOTYPES * STATIC PROTOTYPES
**********************/ **********************/
static lv_res_t lv_canvas_signal(lv_obj_t * canvas, lv_signal_t sign, void * param); static lv_res_t lv_canvas_signal(lv_obj_t * canvas, lv_signal_t sign, void * param);
static void set_px_core(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t c);
/********************** /**********************
* STATIC VARIABLES * STATIC VARIABLES
@ -131,7 +131,9 @@ void lv_canvas_set_buffer(lv_obj_t * canvas, void * buf, lv_coord_t w, lv_coord_
*/ */
void lv_canvas_set_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t c) void lv_canvas_set_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t c)
{ {
set_px_core(canvas, x, y, c); lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
lv_img_buf_set_px(&ext->dsc, x, y, c);
lv_obj_invalidate(canvas); lv_obj_invalidate(canvas);
} }
@ -164,65 +166,9 @@ void lv_canvas_set_style(lv_obj_t * canvas, lv_canvas_style_t type, lv_style_t *
*/ */
lv_color_t lv_canvas_get_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y) lv_color_t lv_canvas_get_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y)
{ {
lv_color_t p_color = LV_COLOR_BLACK;
lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas); lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
if(x >= ext->dsc.header.w) {
x = ext->dsc.header.w - 1;
LV_LOG_WARN("lv_canvas_get_px: x is too large (out of canvas)");
}
else if(x < 0) {
x = 0;
LV_LOG_WARN("lv_canvas_get_px: x is < 0 (out of canvas)");
}
return lv_img_buf_get_px(&ext->dsc, x, y);
if(y >= ext->dsc.header.h) {
y = ext->dsc.header.h - 1;
LV_LOG_WARN("lv_canvas_get_px: y is too large (out of canvas)");
}
else if(y < 0) {
y = 0;
LV_LOG_WARN("lv_canvas_get_px: y is < 0 (out of canvas)");
}
uint8_t * buf_u8 = (uint8_t *) ext->dsc.data;
if(ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR ||
ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED)
{
uint32_t px = ext->dsc.header.w * y * sizeof(lv_color_t) + x * sizeof(lv_color_t);
memcpy(&p_color, &buf_u8[px], sizeof(lv_color_t));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_1BIT) {
buf_u8 += 4 * 2;
uint8_t bit = x & 0x7;
x = x >> 3;
uint32_t px = (ext->dsc.header.w >> 3) * y + x;
p_color.full = (buf_u8[px] & (1 << (7 - bit))) >> (7 - bit);
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_2BIT) {
buf_u8 += 4 * 4;
uint8_t bit = (x & 0x3) * 2;
x = x >> 2;
uint32_t px = (ext->dsc.header.w >> 2) * y + x;
p_color.full = (buf_u8[px] & (3 << (6 - bit))) >> (6 - bit);
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_4BIT) {
buf_u8 += 4 * 16;
uint8_t bit = (x & 0x1) * 4;
x = x >> 1;
uint32_t px = (ext->dsc.header.w >> 1) * y + x;
p_color.full = (buf_u8[px] & (0xF << (4 - bit))) >> (4 - bit);
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_8BIT) {
buf_u8 += 4 * 256;
uint32_t px = ext->dsc.header.w * y + x;
p_color.full = buf_u8[px];
}
return p_color;
} }
/** /**
@ -443,7 +389,7 @@ void lv_canvas_rotate(lv_obj_t * canvas_dest, lv_obj_t * canvas_src, int16_t ang
// if (x + offset_x >= 0 && x + offset_x < dest_width && y + offset_y >= 0 && y + offset_y < dest_height) // if (x + offset_x >= 0 && x + offset_x < dest_width && y + offset_y >= 0 && y + offset_y < dest_height)
{ {
/*The result color as the average of the x/y mixed colors*/ /*The result color as the average of the x/y mixed colors*/
set_px_core(canvas_dest, x + offset_x, y + offset_y, lv_color_mix(x_dest, y_dest, LV_OPA_50)); lv_img_buf_set_px(&ext_dst->dsc, x + offset_x, y + offset_y, lv_color_mix(x_dest, y_dest, LV_OPA_50));
} }
} }
} }
@ -671,61 +617,4 @@ static lv_res_t lv_canvas_signal(lv_obj_t * canvas, lv_signal_t sign, void * par
return res; return res;
} }
/**
* Set a pixel of the canvas. Doesn't check for errors and doesn't invalidate 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
*/
static void set_px_core(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t c)
{
lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
uint8_t * buf_u8 = (uint8_t *) ext->dsc.data;
if(ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR ||
ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED)
{
uint32_t px = ext->dsc.header.w * y * sizeof(lv_color_t) + x * sizeof(lv_color_t);
memcpy(&buf_u8[px], &c, sizeof(lv_color_t));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_1BIT) {
buf_u8 += 4 * 2;
uint8_t bit = x & 0x7;
x = x >> 3;
uint32_t px = (ext->dsc.header.w >> 3) * y + x;
buf_u8[px] = buf_u8[px] & ~(1 << (7 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0x1) << (7 - bit));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_2BIT) {
buf_u8 += 4 * 4;
uint8_t bit = (x & 0x3) * 2;
x = x >> 2;
uint32_t px = (ext->dsc.header.w >> 2) * y + x;
buf_u8[px] = buf_u8[px] & ~(3 << (6 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0x3) << (6 - bit));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_4BIT) {
buf_u8 += 4 * 16;
uint8_t bit = (x & 0x1) * 4;
x = x >> 1;
uint32_t px = (ext->dsc.header.w >> 1) * y + x;
buf_u8[px] = buf_u8[px] & ~(0xF << (4 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0xF) << (4 - bit));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_8BIT) {
buf_u8 += 4 * 256;
uint32_t px = ext->dsc.header.w * y + x;
buf_u8[px] = c.full;
}
}
#endif #endif