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color wheel: show chosen color in another box

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git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@382 b9cfdab3-6d41-4d17-bbe4-086880011989
This commit is contained in:
IoIxD
2025-10-16 22:36:37 +00:00
parent e5c41d7295
commit 04e259e66b
1 changed files with 73 additions and 43 deletions
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116
examples/color_picker.c
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@@ -6,7 +6,6 @@ MwWidget vp;
#define WIN_SIZE 512
#define PICKER_SIZE 360
#define IMG_POS ((WIN_SIZE - PICKER_SIZE) / 2)
#define IMAGE_SIZE (PICKER_SIZE * PICKER_SIZE * 4)
typedef struct {
double r; // a fraction between 0 and 1
@@ -54,15 +53,18 @@ static rgb hsv2rgb(hsv in) {
}
typedef struct {
MwWidget parent;
MwWidget color_wheel_img;
MwWidget slider;
MwLLPixmap pixmap;
double value;
MwWidget parent;
MwWidget color_wheel_img;
MwWidget slider;
MwWidget color_display;
MwLLPixmap color_wheel_pixmap;
MwLLPixmap color_display_pixmap;
double value;
unsigned char* color_wheel_image_data;
unsigned char* color_display_image_data;
} color_wheel;
void color_wheel_update(color_wheel* wheel) {
unsigned char* data = malloc(IMAGE_SIZE);
void color_wheel_wheel_image_update(color_wheel* wheel) {
for(int y = 0; y < PICKER_SIZE; y++) {
for(int x = 0; x < PICKER_SIZE; x++) {
int i = ((y * PICKER_SIZE) + x) * 4;
@@ -72,10 +74,10 @@ void color_wheel_update(color_wheel* wheel) {
double dist = sqrt(_x * _x + _y * _y);
if(dist >= 180.) {
data[i] = 0;
data[i + 1] = 0;
data[i + 2] = 0;
data[i + 3] = 0;
wheel->color_wheel_image_data[i] = 0;
wheel->color_wheel_image_data[i + 1] = 0;
wheel->color_wheel_image_data[i + 2] = 0;
wheel->color_wheel_image_data[i + 3] = 0;
} else {
double xd = (M_PI / 180.) * ((double)_x);
double yd = (M_PI / 180.) * ((double)_y);
@@ -86,26 +88,58 @@ void color_wheel_update(color_wheel* wheel) {
if(hue < 0.0) {
hue += 360;
}
rgb color = hsv2rgb((hsv){
.h = hue / 360.,
.s = dist / 179.61,
.v = wheel->value,
});
data[i] = color.r * 255;
data[i + 1] = color.g * 255;
data[i + 2] = color.b * 255;
data[i + 3] = 255;
rgb color = hsv2rgb((hsv){
.h = hue / 360.,
.s = dist / 179.61,
.v = wheel->value,
});
wheel->color_wheel_image_data[i] = color.r * 255;
wheel->color_wheel_image_data[i + 1] = color.g * 255;
wheel->color_wheel_image_data[i + 2] = color.b * 255;
wheel->color_wheel_image_data[i + 3] = 255;
}
}
}
if(wheel->pixmap != NULL) {
MwLLDestroyPixmap(wheel->pixmap);
if(wheel->color_wheel_pixmap != NULL) {
MwLLDestroyPixmap(wheel->color_wheel_pixmap);
}
wheel->pixmap = MwLoadRaw(wheel->parent, data, PICKER_SIZE, PICKER_SIZE);
free(data);
MwVaApply(wheel->color_wheel_img, MwNpixmap, wheel->pixmap, NULL);
wheel->color_wheel_pixmap = MwLoadRaw(wheel->parent, wheel->color_wheel_image_data, PICKER_SIZE, PICKER_SIZE);
MwVaApply(wheel->color_wheel_img, MwNpixmap, wheel->color_wheel_pixmap, NULL);
}
void color_wheel_color_display_update(color_wheel* wheel, int r, int g, int b) {
for(int y = 0; y < PICKER_SIZE / 16; y++) {
for(int x = 0; x < PICKER_SIZE; x++) {
int i = ((y * PICKER_SIZE) + x) * 4;
wheel->color_display_image_data[i] = r;
wheel->color_display_image_data[i + 1] = g;
wheel->color_display_image_data[i + 2] = b;
wheel->color_display_image_data[i + 3] = 255;
}
}
if(wheel->color_display_pixmap != NULL) {
MwLLDestroyPixmap(wheel->color_display_pixmap);
}
wheel->color_display_pixmap = MwLoadRaw(wheel->parent, wheel->color_display_image_data, PICKER_SIZE, (PICKER_SIZE / 16));
MwVaApply(wheel->color_display, MwNpixmap, wheel->color_display_pixmap, NULL);
}
static void color_wheel_click(MwWidget handle, void* user, void* call) {
color_wheel* wheel = (color_wheel*)user;
MwLLMouse* mouse = (MwLLMouse*)call;
color_wheel_wheel_image_update(wheel);
int i = ((mouse->point.y * PICKER_SIZE) + mouse->point.x) * 4;
int r = wheel->color_wheel_image_data[i];
int g = wheel->color_wheel_image_data[i + 1];
int b = wheel->color_wheel_image_data[i + 2];
color_wheel_color_display_update(wheel, r, g, b);
printf("%d %d %d\n", r, g, b);
}
static void color_wheel_on_change(MwWidget handle, void* user, void* call) {
color_wheel* wheel = (color_wheel*)user;
@@ -114,35 +148,31 @@ static void color_wheel_on_change(MwWidget handle, void* user, void* call) {
wheel->value = 1.0 - ((double)value / 1024.);
color_wheel_update(wheel);
color_wheel_wheel_image_update(wheel);
}
void color_wheel_setup(MwWidget parent, color_wheel* wheel) {
wheel->parent = parent;
wheel->color_wheel_img = MwVaCreateWidget(MwImageClass, "image", wheel->parent, IMG_POS, IMG_POS, PICKER_SIZE, PICKER_SIZE, NULL);
wheel->pixmap = NULL;
wheel->value = 1;
wheel->color_wheel_img = MwVaCreateWidget(MwImageClass, "image", wheel->parent, IMG_POS, IMG_POS, PICKER_SIZE, PICKER_SIZE, NULL);
wheel->color_wheel_image_data = malloc(PICKER_SIZE * PICKER_SIZE * 4);
wheel->color_display_image_data = malloc((PICKER_SIZE / 16) * PICKER_SIZE * 4);
color_wheel_update(wheel);
wheel->color_wheel_pixmap = NULL;
wheel->color_display_pixmap = NULL;
wheel->value = 1;
color_wheel_wheel_image_update(wheel);
MwAddUserHandler(wheel->color_wheel_img, MwNmouseDownHandler, color_wheel_click, wheel);
wheel->slider = MwVaCreateWidget(MwScrollBarClass, "scroll", wheel->parent, IMG_POS + PICKER_SIZE, IMG_POS, PICKER_SIZE / 32, PICKER_SIZE, MwNorientation, MwVERTICAL, MwNminValue, 0, MwNmaxValue, 1024, NULL);
MwAddUserHandler(wheel->slider, MwNchangedHandler, color_wheel_on_change, wheel);
wheel->color_display = MwCreateWidget(MwImageClass, "colorDisplay", wheel->parent, IMG_POS, IMG_POS + PICKER_SIZE + (PICKER_SIZE / 64), PICKER_SIZE, PICKER_SIZE / 16);
};
int main() {
for(int h = 0; h < 255; h++) {
for(int s = 0; s < 255; s++) {
for(int v = 0; v < 255; v++) {
rgb col = hsv2rgb((hsv){
.h = h,
.s = s,
.v = v});
}
}
}
MwWidget w = MwVaCreateWidget(MwWindowClass, "main", NULL, MwDEFAULT, MwDEFAULT, WIN_SIZE, WIN_SIZE, MwNtitle, "test", NULL);
color_wheel wheel;