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git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@583 b9cfdab3-6d41-4d17-bbe4-086880011989
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NishiOwO
327
src/dialog/colorpicker.c
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327
src/dialog/colorpicker.c
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/* $Id$ */
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#include <Mw/Milsko.h>
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#define WIN_SIZE 464
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#define PICKER_SIZE 360
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#define IMG_POS_X(w) ((w - PICKER_SIZE) / 2)
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#define IMG_POS_Y(h) ((h - PICKER_SIZE) / 2)
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#define SCROLL_BAR_WIDTH 16
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#define MARGIN (PICKER_SIZE / 32)
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#define COLOR_DISPLAY_HEIGHT 12
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#define HSV_HUE_SEXTANT 256.
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#define HSV_HUE_STEPS (6. * HSV_HUE_SEXTANT)
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#define HSV_HUE_MIN 0.
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#define HSV_HUE_MAX (HSV_HUE_STEPS - 1.)
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#define HSV_SAT_MIN 0.
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#define HSV_SAT_MAX 255.
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#define HSV_VAL_MIN 0.
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#define HSV_VAL_MAX 255.
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typedef struct _MwHSV {
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MwBool generated : 1;
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MwU16 h : 11;
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MwU8 s;
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MwU8 v;
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} MwHSV;
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typedef struct color_picker {
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MwWidget parent;
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MwWidget color_picker_img;
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MwWidget value_slider;
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MwWidget color_display;
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MwWidget color_display_text;
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MwWidget finish;
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MwLLPixmap color_picker_pixmap;
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double value;
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MwRGB chosen_color;
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unsigned char color_picker_image_data[PICKER_SIZE * PICKER_SIZE * 4];
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MwHSV hue_table[101753];
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} color_picker_t;
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static void hsv2rgb(MwU32 h, MwU32 s, MwU32 v, MwU16* r, MwU16* g, MwU16* b) {
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MwU8 sextant = h >> 8;
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MwU16 ww;
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MwU32 h_fraction, d;
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#define HSV_SWAPPTR(a, b) \
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do { \
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MwU16* tmp = a; \
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a = b; \
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b = tmp; \
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} while(0)
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if(sextant & 2) {
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HSV_SWAPPTR(r, b);
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}
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if(sextant & 4) {
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HSV_SWAPPTR(g, b);
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}
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if(!(sextant & 6)) {
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if(!(sextant & 1)) {
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HSV_SWAPPTR(r, g);
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}
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} else {
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if(sextant & 1) {
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HSV_SWAPPTR(r, g);
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}
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}
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*g = v; /* Top level */
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/* Perform actual calculations */
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/**
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* Bottom level: v * (1.0 - s)
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* --> (v * (255 - s) + error_corr + 1) / 256
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*/
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ww = v * (255 - (s)); /* We don't use ~s to prevent size-promotion side effects */
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ww += 1; /* Error correction */
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ww += ww >> 8; /* Error correction */
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*b = ww >> 8;
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h_fraction = h & 0xff; /* 0...255 */
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if(!(sextant & 1)) {
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/* *r = ...slope_up...; */
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d = v * (MwU32)((0xff << 8) - (MwU16)(s * (0xff - h_fraction)));
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*r = d >> 16;
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} else {
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/* *r = ...slope_down...; */
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d = v * (MwU32)((0xff << 8) - (MwU16)(s * h_fraction));
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*r = d >> 16;
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}
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return;
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}
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static void color_picker_image_update(color_picker_t* picker) {
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MwU16 y, x;
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int n = 0;
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for(y = 0; y < PICKER_SIZE; y++) {
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for(x = 0; x < PICKER_SIZE; x++) {
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int i = ((y * PICKER_SIZE) + x) * 4;
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int _x = x - (PICKER_SIZE / 2);
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int _y = y - (PICKER_SIZE / 2);
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double dist = sqrt(_x * _x + _y * _y);
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if(dist >= 180.) {
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picker->color_picker_image_data[i] = 0;
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picker->color_picker_image_data[i + 1] = 0;
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picker->color_picker_image_data[i + 2] = 0;
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picker->color_picker_image_data[i + 3] = 0;
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} else {
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MwHSV hsv_v;
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MwRGB color;
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if(picker->hue_table[n].generated == 0) {
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double xd = (M_PI / 180.) * ((double)_x);
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double yd = (M_PI / 180.) * ((double)_y);
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float angle = atan2(yd, xd) - M_PI;
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float hue = (angle * 180.) / M_PI;
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if(hue < 0.0) {
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hue += 360;
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}
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hsv_v.h = (hue) * (HSV_HUE_STEPS / 360.);
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hsv_v.s = (dist) * (HSV_SAT_MAX / 180.);
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picker->hue_table[n] = hsv_v;
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picker->hue_table[n].generated = 1;
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}
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hsv_v = picker->hue_table[n];
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hsv_v.v = HSV_VAL_MAX - (picker->value * HSV_VAL_MAX);
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hsv2rgb(hsv_v.h, hsv_v.s, hsv_v.v, &color.red, &color.green, &color.blue);
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picker->color_picker_image_data[i] = color.red;
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picker->color_picker_image_data[i + 1] = color.green;
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picker->color_picker_image_data[i + 2] = color.blue;
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picker->color_picker_image_data[i + 3] = 255;
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n++;
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}
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}
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}
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if(picker->color_picker_pixmap == NULL) {
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picker->color_picker_pixmap = MwLoadRaw(
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picker->parent, picker->color_picker_image_data, PICKER_SIZE, PICKER_SIZE);
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} else {
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MwReloadRaw(
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picker->parent, picker->color_picker_image_data, PICKER_SIZE, PICKER_SIZE, picker->color_picker_pixmap);
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}
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MwVaApply(picker->color_picker_img, MwNpixmap, picker->color_picker_pixmap, NULL);
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// printf("%d\n", n);
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}
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static void color_picker_click(MwWidget handle, void* user, void* call) {
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color_picker_t* picker = user;
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MwLLMouse* mouse = call;
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char hexColor[8];
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int i;
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char fgColor[8];
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int fr, fg, fb;
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(void)handle;
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(void)user;
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(void)call;
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color_picker_image_update(picker);
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i = ((mouse->point.y * PICKER_SIZE) + mouse->point.x) * 4;
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picker->chosen_color.red = picker->color_picker_image_data[i];
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picker->chosen_color.green = picker->color_picker_image_data[i + 1];
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picker->chosen_color.blue = picker->color_picker_image_data[i + 2];
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sprintf(hexColor, "#%02X%02X%02X", picker->chosen_color.red, picker->chosen_color.green, picker->chosen_color.blue);
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fr = picker->chosen_color.red > 128 ? 0 : 255;
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fg = picker->chosen_color.green > 128 ? 0 : 255;
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fb = picker->chosen_color.blue > 128 ? 0 : 255;
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sprintf(fgColor, "#%02X%02X%02X", fr, fg, fb);
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MwSetText(picker->color_display, MwNbackground, hexColor);
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MwSetText(picker->color_display_text, MwNforeground, fgColor);
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MwSetText(picker->color_display_text, MwNbackground, hexColor);
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MwSetText(picker->color_display_text, MwNtext, hexColor);
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}
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static void color_picker_on_change_value(MwWidget handle, void* user,
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void* call) {
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color_picker_t* picker = user;
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int value = MwGetInteger(handle, MwNvalue);
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int diff = MwGetInteger(handle, MwNchangedBy);
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(void)diff;
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(void)call;
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picker->value = ((double)value / 1024.);
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color_picker_image_update(picker);
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}
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static void color_picker_destroy(color_picker_t* picker) {
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MwLLDestroyPixmap(picker->color_picker_pixmap);
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free(picker);
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}
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static void color_picker_close(MwWidget handle, void* user,
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void* call) {
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color_picker_t* picker = user;
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(void)call;
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color_picker_destroy(picker);
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MwDestroyWidget(handle);
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}
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static void color_picker_finish(MwWidget handle, void* user,
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void* call) {
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color_picker_t* picker = user;
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(void)call;
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MwDispatchUserHandler(picker->parent, MwNcolorChosenHandler, &picker->chosen_color);
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color_picker_destroy(picker);
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MwDestroyWidget(handle->parent);
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}
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color_picker_t* color_picker_setup(MwWidget parent, int w, int h) {
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color_picker_t* picker = malloc(sizeof(*picker));
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memset(picker, 0, sizeof(*picker));
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picker->parent = parent;
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picker->color_picker_img =
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MwVaCreateWidget(MwImageClass, "image", picker->parent, IMG_POS_X(w), IMG_POS_Y(h),
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PICKER_SIZE, PICKER_SIZE, NULL);
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// picker->color_picker_image_data = malloc(PICKER_SIZE * PICKER_SIZE * 4);
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picker->color_picker_pixmap = NULL;
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picker->value = 0;
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color_picker_image_update(picker);
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MwAddUserHandler(picker->color_picker_img, MwNmouseDownHandler,
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color_picker_click, picker);
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picker->color_display = MwCreateWidget(
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MwFrameClass, "colorDisplayFrame", picker->parent, IMG_POS_X(w),
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IMG_POS_Y(h) - (PICKER_SIZE / 16) - MARGIN, PICKER_SIZE, PICKER_SIZE / 16);
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MwSetText(picker->color_display, MwNbackground, "#FFFFFF");
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MwSetInteger(picker->color_display, MwnhasBorder, 1);
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MwSetInteger(picker->color_display, MwNinverted, 1);
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picker->color_display_text = MwCreateWidget(
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MwLabelClass, "colorDisplayFrameText", picker->color_display,
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MwDefaultBorderWidth(parent), MwDefaultBorderWidth(parent),
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PICKER_SIZE - MwDefaultBorderWidth(parent),
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(PICKER_SIZE / 16) - (MwDefaultBorderWidth(parent) * 2));
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MwSetText(picker->color_display_text, MwNtext, "#FFFFFF");
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picker->value_slider = MwVaCreateWidget(
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MwScrollBarClass, "value-slider", picker->parent,
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/* x */
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IMG_POS_X(w) + PICKER_SIZE + MARGIN,
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/* y */
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IMG_POS_Y(h),
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/* width */
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SCROLL_BAR_WIDTH,
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/* height */
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PICKER_SIZE,
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MwNorientation, MwVERTICAL, MwNminValue, 0, MwNmaxValue, 1024, NULL);
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MwAddUserHandler(picker->value_slider, MwNchangedHandler,
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color_picker_on_change_value, picker);
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picker->finish = MwCreateWidget(
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MwButtonClass, "colorPickerFinish", picker->parent, IMG_POS_X(w),
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IMG_POS_Y(h) + PICKER_SIZE + MARGIN, PICKER_SIZE, (WIN_SIZE - PICKER_SIZE - MARGIN * 4) / 2);
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MwSetText(picker->finish, MwNtext, "Select");
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MwSetInteger(picker->finish, MwnhasBorder, 1);
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MwSetInteger(picker->finish, MwNinverted, 1);
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MwAddUserHandler(picker->finish, MwNactivateHandler,
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color_picker_finish, picker);
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memset(picker->hue_table, 0, sizeof(picker->hue_table));
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return picker;
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}
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MwWidget MwColorPicker(MwWidget handle, const char* title) {
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MwPoint p;
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color_picker_t* wheel;
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MwWidget window;
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MwSizeHints sh;
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p.x = p.y = 0;
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sh.min_width = sh.max_width = WIN_SIZE;
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sh.min_height = sh.max_height = WIN_SIZE;
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window = MwVaCreateWidget(MwWindowClass, "main", handle, MwDEFAULT, MwDEFAULT,
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WIN_SIZE, WIN_SIZE,
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MwNtitle, title,
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MwNsizeHints, &sh,
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NULL);
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wheel = color_picker_setup(window, WIN_SIZE, WIN_SIZE);
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MwAddUserHandler(window, MwNcloseHandler, color_picker_close, wheel);
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MwLLDetach(window->lowlevel, &p);
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MwLLMakePopup(window->lowlevel, handle->lowlevel);
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return window;
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}
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