openmv/src/omv/imlib/mathop.c
2024-02-16 11:49:19 -08:00

555 lines
23 KiB
C

/*
* This file is part of the OpenMV project.
*
* Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
* Copyright (c) 2013-2021 Kwabena W. Agyeman <kwagyeman@openmv.io>
*
* This work is licensed under the MIT license, see the file LICENSE for details.
*
* Image math operations.
*/
#include "imlib.h"
#ifdef IMLIB_ENABLE_MATH_OPS
void imlib_negate(image_t *img) {
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
for (int y = 0, yy = img->h; y < yy; y++) {
uint32_t *data = IMAGE_COMPUTE_BINARY_PIXEL_ROW_PTR(img, y);
int x = 0, xx = img->w;
uint32_t *s = data;
for (; x < xx - 31; x += 32) {
// do it faster with bit access
s[0] = ~s[0]; // invert 32 bits (pixels) in one shot
s++;
}
for (; x < xx; x++) {
int dataPixel = IMAGE_GET_BINARY_PIXEL_FAST(data, x);
int p = (COLOR_BINARY_MAX - COLOR_BINARY_MIN) - dataPixel;
IMAGE_PUT_BINARY_PIXEL_FAST(data, x, p);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
for (int y = 0, yy = img->h; y < yy; y++) {
uint8_t *data = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, y);
int x = 0, xx = img->w;
uint32_t a, b, *s = (uint32_t *) data;
for (; x < xx - 7; x += 8) {
// process a pair of 4 pixels at a time
a = s[0]; b = s[1]; // read 8 pixels
s[0] = ~a; s[1] = ~b;
s += 2;
}
for (; x < xx; x++) {
int dataPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(data, x);
int p = (COLOR_GRAYSCALE_MAX - COLOR_GRAYSCALE_MIN) - dataPixel;
IMAGE_PUT_GRAYSCALE_PIXEL_FAST(data, x, p);
}
}
break;
}
case PIXFORMAT_RGB565: {
for (int y = 0, yy = img->h; y < yy; y++) {
uint16_t *data = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, y);
for (int x = 0, xx = img->w; x < xx; x++) {
int dataPixel = IMAGE_GET_RGB565_PIXEL_FAST(data, x);
IMAGE_PUT_RGB565_PIXEL_FAST(data, x, ~dataPixel);
}
}
break;
}
default: {
break;
}
}
}
typedef struct imlib_replace_line_op_state {
bool hmirror, vflip, transpose;
image_t *mask;
} imlib_replace_line_op_state_t;
static void imlib_replace_line_op(image_t *img, int line, void *other, void *data, bool vflipped) {
bool hmirror = ((imlib_replace_line_op_state_t *) data)->hmirror;
bool vflip = ((imlib_replace_line_op_state_t *) data)->vflip;
bool transpose = ((imlib_replace_line_op_state_t *) data)->transpose;
image_t *mask = ((imlib_replace_line_op_state_t *) data)->mask;
image_t target;
memcpy(&target, img, sizeof(image_t));
if (transpose) {
int w = target.w;
int h = target.h;
target.w = h;
target.h = w;
}
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
int v_line = vflip ? (img->h - line - 1) : line;
for (int i = 0, j = img->w; i < j; i++) {
int h_i = hmirror ? (img->w - i - 1) : i;
if ((!mask) || image_get_mask_pixel(mask, h_i, v_line)) {
int pixel = IMAGE_GET_BINARY_PIXEL_FAST(((uint32_t *) other), h_i);
IMAGE_PUT_BINARY_PIXEL(&target, transpose ? v_line : i, transpose ? i : v_line, pixel);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
int v_line = vflip ? (img->h - line - 1) : line;
for (int i = 0, j = img->w; i < j; i++) {
int h_i = hmirror ? (img->w - i - 1) : i;
if ((!mask) || image_get_mask_pixel(mask, h_i, v_line)) {
int pixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(((uint8_t *) other), h_i);
IMAGE_PUT_GRAYSCALE_PIXEL(&target, transpose ? v_line : i, transpose ? i : v_line, pixel);
}
}
break;
}
case PIXFORMAT_RGB565: {
int v_line = vflip ? (img->h - line - 1) : line;
for (int i = 0, j = img->w; i < j; i++) {
int h_i = hmirror ? (img->w - i - 1) : i;
if ((!mask) || image_get_mask_pixel(mask, h_i, v_line)) {
int pixel = IMAGE_GET_RGB565_PIXEL_FAST(((uint16_t *) other), h_i);
IMAGE_PUT_RGB565_PIXEL(&target, transpose ? v_line : i, transpose ? i : v_line, pixel);
}
}
break;
}
default: {
break;
}
}
}
void imlib_replace(image_t *img,
const char *path,
image_t *other,
int scalar,
bool hmirror,
bool vflip,
bool transpose,
image_t *mask) {
bool in_place = img->data == other->data;
image_t temp;
if (in_place) {
memcpy(&temp, other, sizeof(image_t));
temp.data = fb_alloc(image_size(&temp), FB_ALLOC_NO_HINT);
memcpy(temp.data, other->data, image_size(&temp));
other = &temp;
}
// To improve transpose performance we will split the operation up into chunks that fit in
// onchip RAM. These chunks will then be copied to the target buffer in an efficent manner.
if (path == NULL && other && transpose) {
uint32_t size;
void *data = fb_alloc_all(&size, FB_ALLOC_PREFER_SPEED);
// line_num stores how many lines we can do at a time with on-chip RAM.
int line_num = size / image_line_size(other);
// Transposed chunks will be copied to the output image...
uint8_t *img_data = img->data;
int t_line_size = (image_line_size(img) * img->h) / img->w;
// Work top to bottom transposing as many lines at a time in a chunk of the image.
for (int i = 0, ii = other->h; i < ii; i += line_num) {
line_num = IM_MIN(line_num, (ii - i));
// Make an image that is a slice of the input image.
image_t in = {.w = other->w, .h = line_num, .pixfmt = other->pixfmt};
in.data = other->data + (image_line_size(other) * i);
// Make an image that will hold the transposed output.
image_t out = in;
out.data = data;
// Transpose the slice of the input image.
imlib_replace_line_op_state_t state;
state.hmirror = hmirror;
state.vflip = vflip;
state.mask = mask;
state.transpose = true;
imlib_image_operation(&out, NULL, &in, 0, imlib_replace_line_op, &state);
out.w = line_num;
out.h = other->w;
// Copy lines of the chunk to the target image.
int out_line_size = image_line_size(&out);
for (int j = 0, jj = out.h; j < jj; j++) {
memcpy(img_data + (t_line_size * j), out.data + (out_line_size * j), out_line_size);
}
// Slide the offset for the first line over by the size of the slice we transposed.
img_data += out_line_size;
}
fb_free(); // fb_alloc_all
} else {
imlib_replace_line_op_state_t state;
state.hmirror = hmirror;
state.vflip = vflip;
state.mask = mask;
state.transpose = transpose;
imlib_image_operation(img, path, other, scalar, imlib_replace_line_op, &state);
}
if (in_place) {
fb_free();
}
if (transpose) {
int w = img->w;
int h = img->h;
img->w = h;
img->h = w;
}
}
static void imlib_add_line_op(image_t *img, int line, void *other, void *data, bool vflipped) {
image_t *mask = (image_t *) data;
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
uint32_t *data = IMAGE_COMPUTE_BINARY_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_BINARY_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_BINARY_PIXEL_FAST(((uint32_t *) other), i);
int p = dataPixel | otherPixel; //dataPixel + otherPixel;
// p = IM_MIN(p, COLOR_BINARY_MAX);
IMAGE_PUT_BINARY_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
uint8_t *data = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(((uint8_t *) other), i);
int p = dataPixel + otherPixel;
p = IM_MIN(p, COLOR_GRAYSCALE_MAX);
IMAGE_PUT_GRAYSCALE_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_RGB565: {
uint16_t *data = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_RGB565_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_RGB565_PIXEL_FAST(((uint16_t *) other), i);
int r = COLOR_RGB565_TO_R5(dataPixel) + COLOR_RGB565_TO_R5(otherPixel);
int g = COLOR_RGB565_TO_G6(dataPixel) + COLOR_RGB565_TO_G6(otherPixel);
int b = COLOR_RGB565_TO_B5(dataPixel) + COLOR_RGB565_TO_B5(otherPixel);
r = IM_MIN(r, COLOR_R5_MAX);
g = IM_MIN(g, COLOR_G6_MAX);
b = IM_MIN(b, COLOR_B5_MAX);
IMAGE_PUT_RGB565_PIXEL_FAST(data, i, COLOR_R5_G6_B5_TO_RGB565(r, g, b));
}
}
break;
}
default: {
break;
}
}
}
void imlib_add(image_t *img, const char *path, image_t *other, int scalar, image_t *mask) {
imlib_image_operation(img, path, other, scalar, imlib_add_line_op, mask);
}
typedef struct imlib_sub_line_op_state {
bool reverse;
image_t *mask;
} imlib_sub_line_op_state_t;
static void imlib_sub_line_op(image_t *img, int line, void *other, void *data, bool vflipped) {
bool reverse = ((imlib_sub_line_op_state_t *) data)->reverse;
image_t *mask = ((imlib_sub_line_op_state_t *) data)->mask;
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
uint32_t *data = IMAGE_COMPUTE_BINARY_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_BINARY_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_BINARY_PIXEL_FAST(((uint32_t *) other), i);
int p = reverse ? (otherPixel - dataPixel) : (dataPixel - otherPixel);
p = IM_MAX(p, COLOR_BINARY_MIN);
IMAGE_PUT_BINARY_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
uint8_t *data = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(((uint8_t *) other), i);
int p = reverse ? (otherPixel - dataPixel) : (dataPixel - otherPixel);
p = IM_MAX(p, COLOR_GRAYSCALE_MIN);
IMAGE_PUT_GRAYSCALE_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_RGB565: {
uint16_t *data = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_RGB565_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_RGB565_PIXEL_FAST(((uint16_t *) other), i);
int dR = COLOR_RGB565_TO_R5(dataPixel);
int dG = COLOR_RGB565_TO_G6(dataPixel);
int dB = COLOR_RGB565_TO_B5(dataPixel);
int oR = COLOR_RGB565_TO_R5(otherPixel);
int oG = COLOR_RGB565_TO_G6(otherPixel);
int oB = COLOR_RGB565_TO_B5(otherPixel);
int r = reverse ? (oR - dR) : (dR - oR);
int g = reverse ? (oG - dG) : (dG - oG);
int b = reverse ? (oB - dB) : (dB - oB);
r = IM_MAX(r, COLOR_R5_MIN);
g = IM_MAX(g, COLOR_G6_MIN);
b = IM_MAX(b, COLOR_B5_MIN);
IMAGE_PUT_RGB565_PIXEL_FAST(data, i, COLOR_R5_G6_B5_TO_RGB565(r, g, b));
}
}
break;
}
default: {
break;
}
}
}
void imlib_sub(image_t *img, const char *path, image_t *other, int scalar, bool reverse, image_t *mask) {
imlib_sub_line_op_state_t state;
state.reverse = reverse;
state.mask = mask;
imlib_image_operation(img, path, other, scalar, imlib_sub_line_op, &state);
}
static void imlib_min_line_op(image_t *img, int line, void *other, void *data, bool vflipped) {
image_t *mask = (image_t *) data;
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
uint32_t *data = IMAGE_COMPUTE_BINARY_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_BINARY_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_BINARY_PIXEL_FAST(((uint32_t *) other), i);
int p = IM_MIN(dataPixel, otherPixel);
IMAGE_PUT_BINARY_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
uint8_t *data = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(((uint8_t *) other), i);
int p = IM_MIN(dataPixel, otherPixel);
IMAGE_PUT_GRAYSCALE_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_RGB565: {
uint16_t *data = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_RGB565_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_RGB565_PIXEL_FAST(((uint16_t *) other), i);
int r = IM_MIN(COLOR_RGB565_TO_R5(dataPixel), COLOR_RGB565_TO_R5(otherPixel));
int g = IM_MIN(COLOR_RGB565_TO_G6(dataPixel), COLOR_RGB565_TO_G6(otherPixel));
int b = IM_MIN(COLOR_RGB565_TO_B5(dataPixel), COLOR_RGB565_TO_B5(otherPixel));
IMAGE_PUT_RGB565_PIXEL_FAST(data, i, COLOR_R5_G6_B5_TO_RGB565(r, g, b));
}
}
break;
}
default: {
break;
}
}
}
void imlib_min(image_t *img, const char *path, image_t *other, int scalar, image_t *mask) {
imlib_image_operation(img, path, other, scalar, imlib_min_line_op, mask);
}
static void imlib_max_line_op(image_t *img, int line, void *other, void *data, bool vflipped) {
image_t *mask = (image_t *) data;
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
uint32_t *data = IMAGE_COMPUTE_BINARY_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_BINARY_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_BINARY_PIXEL_FAST(((uint32_t *) other), i);
int p = IM_MAX(dataPixel, otherPixel);
IMAGE_PUT_BINARY_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
uint8_t *data = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(((uint8_t *) other), i);
int p = IM_MAX(dataPixel, otherPixel);
IMAGE_PUT_GRAYSCALE_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_RGB565: {
uint16_t *data = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_RGB565_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_RGB565_PIXEL_FAST(((uint16_t *) other), i);
int r = IM_MAX(COLOR_RGB565_TO_R5(dataPixel), COLOR_RGB565_TO_R5(otherPixel));
int g = IM_MAX(COLOR_RGB565_TO_G6(dataPixel), COLOR_RGB565_TO_G6(otherPixel));
int b = IM_MAX(COLOR_RGB565_TO_B5(dataPixel), COLOR_RGB565_TO_B5(otherPixel));
IMAGE_PUT_RGB565_PIXEL_FAST(data, i, COLOR_R5_G6_B5_TO_RGB565(r, g, b));
}
}
break;
}
default: {
break;
}
}
}
void imlib_max(image_t *img, const char *path, image_t *other, int scalar, image_t *mask) {
imlib_image_operation(img, path, other, scalar, imlib_max_line_op, mask);
}
static void imlib_difference_line_op(image_t *img, int line, void *other, void *data, bool vflipped) {
image_t *mask = (image_t *) data;
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
uint32_t *data = IMAGE_COMPUTE_BINARY_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_BINARY_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_BINARY_PIXEL_FAST(((uint32_t *) other), i);
int p = dataPixel ^ otherPixel; // abs(dataPixel - otherPixel);
IMAGE_PUT_BINARY_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
uint8_t *data = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(((uint8_t *) other), i);
int p = abs(dataPixel - otherPixel);
IMAGE_PUT_GRAYSCALE_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_RGB565: {
uint16_t *data = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_RGB565_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_RGB565_PIXEL_FAST(((uint16_t *) other), i);
int r = abs(COLOR_RGB565_TO_R5(dataPixel) - COLOR_RGB565_TO_R5(otherPixel));
int g = abs(COLOR_RGB565_TO_G6(dataPixel) - COLOR_RGB565_TO_G6(otherPixel));
int b = abs(COLOR_RGB565_TO_B5(dataPixel) - COLOR_RGB565_TO_B5(otherPixel));
IMAGE_PUT_RGB565_PIXEL_FAST(data, i, COLOR_R5_G6_B5_TO_RGB565(r, g, b));
}
}
break;
}
default: {
break;
}
}
}
void imlib_difference(image_t *img, const char *path, image_t *other, int scalar, image_t *mask) {
imlib_image_operation(img, path, other, scalar, imlib_difference_line_op, mask);
}
typedef struct imlib_blend_line_op_state {
float alpha;
image_t *mask;
} imlib_blend_line_op_t;
static void imlib_blend_line_op(image_t *img, int line, void *other, void *data, bool vflipped) {
float alpha = ((imlib_blend_line_op_t *) data)->alpha, beta = 1 - alpha;
image_t *mask = ((imlib_blend_line_op_t *) data)->mask;
switch (img->pixfmt) {
case PIXFORMAT_BINARY: {
uint32_t *data = IMAGE_COMPUTE_BINARY_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_BINARY_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_BINARY_PIXEL_FAST(((uint32_t *) other), i);
int p = (dataPixel * alpha) + (otherPixel * beta);
IMAGE_PUT_BINARY_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_GRAYSCALE: {
uint8_t *data = IMAGE_COMPUTE_GRAYSCALE_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_GRAYSCALE_PIXEL_FAST(((uint8_t *) other), i);
int p = (dataPixel * alpha) + (otherPixel * beta);
IMAGE_PUT_GRAYSCALE_PIXEL_FAST(data, i, p);
}
}
break;
}
case PIXFORMAT_RGB565: {
uint16_t *data = IMAGE_COMPUTE_RGB565_PIXEL_ROW_PTR(img, line);
for (int i = 0, j = img->w; i < j; i++) {
if ((!mask) || image_get_mask_pixel(mask, i, line)) {
int dataPixel = IMAGE_GET_RGB565_PIXEL_FAST(data, i);
int otherPixel = IMAGE_GET_RGB565_PIXEL_FAST(((uint16_t *) other), i);
int r = (COLOR_RGB565_TO_R5(dataPixel) * alpha) + (COLOR_RGB565_TO_R5(otherPixel) * beta);
int g = (COLOR_RGB565_TO_G6(dataPixel) * alpha) + (COLOR_RGB565_TO_G6(otherPixel) * beta);
int b = (COLOR_RGB565_TO_B5(dataPixel) * alpha) + (COLOR_RGB565_TO_B5(otherPixel) * beta);
IMAGE_PUT_RGB565_PIXEL_FAST(data, i, COLOR_R5_G6_B5_TO_RGB565(r, g, b));
}
}
break;
}
default: {
break;
}
}
}
void imlib_blend(image_t *img, const char *path, image_t *other, int scalar, float alpha, image_t *mask) {
imlib_blend_line_op_t state;
state.alpha = alpha;
state.mask = mask;
imlib_image_operation(img, path, other, scalar, imlib_blend_line_op, &state);
}
#endif //IMLIB_ENABLE_MATH_OPS