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Nuklear/demo/x11_xft/nuklear_xlib.h

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/*
* Nuklear - v1.40.8 - public domain
* no warrenty implied; use at your own risk.
* authored from 2015-2017 by Micha Mettke
*/
/*
* ==============================================================
*
* API
*
* ===============================================================
*/
#ifndef NK_XLIB_H_
#define NK_XLIB_H_
#include <X11/Xlib.h>
typedef struct XFont XFont;
#ifdef NK_XLIB_USE_XFT
NK_API struct nk_context* nk_xlib_init(XFont*, Display*, int scrn, Window root, Visual *vis, Colormap cmap, unsigned w, unsigned h);
#else
NK_API struct nk_context* nk_xlib_init(XFont*, Display*, int scrn, Window root, unsigned w, unsigned h);
#endif
NK_API int nk_xlib_handle_event(Display*, int scrn, Window, XEvent*);
NK_API void nk_xlib_render(Drawable screen, struct nk_color clear);
NK_API void nk_xlib_shutdown(void);
NK_API void nk_xlib_set_font(XFont*);
NK_API void nk_xlib_push_font(XFont*);
NK_API void nk_xlib_paste(nk_handle, struct nk_text_edit*);
NK_API void nk_xlib_copy(nk_handle, const char*, int len);
/* Image */
#ifdef NK_XLIB_INCLUDE_STB_IMAGE
NK_API struct nk_image nk_xsurf_load_image_from_file(char const *filename);
NK_API struct nk_image nk_xsurf_load_image_from_memory(const void *membuf, nk_uint membufSize);
#endif
/* Font */
NK_API XFont* nk_xfont_create(Display *dpy, const char *name);
NK_API void nk_xfont_del(Display *dpy, XFont *font);
#endif
/*
* ==============================================================
*
* IMPLEMENTATION
*
* ===============================================================
*/
#ifdef NK_XLIB_IMPLEMENTATION
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xresource.h>
#include <X11/Xlocale.h>
#include <X11/Xatom.h>
#ifdef NK_XLIB_USE_XFT
#include <X11/Xft/Xft.h>
#endif
#include <sys/time.h>
#include <unistd.h>
#include <time.h>
#ifdef NK_XLIB_IMPLEMENT_STB_IMAGE
#define STB_IMAGE_IMPLEMENTATION
#endif
#ifdef NK_XLIB_INCLUDE_STB_IMAGE
#include "../../example/stb_image.h"
#endif
#ifndef NK_X11_DOUBLE_CLICK_LO
#define NK_X11_DOUBLE_CLICK_LO 0.02
#endif
#ifndef NK_X11_DOUBLE_CLICK_HI
#define NK_X11_DOUBLE_CLICK_HI 0.20
#endif
typedef struct XSurface XSurface;
typedef struct XImageWithAlpha XImageWithAlpha;
struct XFont {
int ascent;
int descent;
int height;
#ifdef NK_XLIB_USE_XFT
XftFont * ft;
#else
XFontSet set;
XFontStruct *xfont;
#endif
struct nk_user_font handle;
};
struct XSurface {
GC gc;
Display *dpy;
int screen;
Window root;
Drawable drawable;
unsigned int w, h;
#ifdef NK_XLIB_USE_XFT
XftDraw * ftdraw;
#endif
};
struct XImageWithAlpha {
XImage* ximage;
GC clipMaskGC;
Pixmap clipMask;
};
static struct {
char *clipboard_data;
int clipboard_len;
struct nk_text_edit* clipboard_target;
Atom xa_clipboard;
Atom xa_targets;
Atom xa_text;
Atom xa_utf8_string;
struct nk_context ctx;
struct XSurface *surf;
Cursor cursor;
Display *dpy;
Window root;
#ifdef NK_XLIB_USE_XFT
Visual *vis;
Colormap cmap;
#endif
double last_button_click;
double time_of_last_frame;
} xlib;
NK_INTERN double
nk_get_time(void)
{
struct timeval tv;
if (gettimeofday(&tv, NULL) < 0) return 0;
return ((double)tv.tv_sec + (double)tv.tv_usec/1000000);
}
NK_INTERN unsigned long
nk_color_from_byte(const nk_byte *c)
{
unsigned long res = 0;
res |= (unsigned long)c[0] << 16;
res |= (unsigned long)c[1] << 8;
res |= (unsigned long)c[2] << 0;
return (res);
}
NK_INTERN XSurface*
nk_xsurf_create(int screen, unsigned int w, unsigned int h)
{
XSurface *surface = (XSurface*)calloc(1, sizeof(XSurface));
surface->w = w;
surface->h = h;
surface->dpy = xlib.dpy;
surface->screen = screen;
surface->root = xlib.root;
surface->gc = XCreateGC(xlib.dpy, xlib.root, 0, NULL);
XSetLineAttributes(xlib.dpy, surface->gc, 1, LineSolid, CapButt, JoinMiter);
surface->drawable = XCreatePixmap(xlib.dpy, xlib.root, w, h,
(unsigned int)DefaultDepth(xlib.dpy, screen));
#ifdef NK_XLIB_USE_XFT
surface->ftdraw = XftDrawCreate(xlib.dpy, surface->drawable,
xlib.vis, xlib.cmap);
#endif
return surface;
}
NK_INTERN void
nk_xsurf_resize(XSurface *surf, unsigned int w, unsigned int h)
{
if(!surf) return;
if (surf->w == w && surf->h == h) return;
surf->w = w; surf->h = h;
if(surf->drawable) XFreePixmap(surf->dpy, surf->drawable);
surf->drawable = XCreatePixmap(surf->dpy, surf->root, w, h,
(unsigned int)DefaultDepth(surf->dpy, surf->screen));
#ifdef NK_XLIB_USE_XFT
XftDrawChange(surf->ftdraw, surf->drawable);
#endif
return;
}
NK_INTERN void
nk_xsurf_scissor(XSurface *surf, float x, float y, float w, float h)
{
XRectangle clip_rect;
clip_rect.x = (short)(x-1);
clip_rect.y = (short)(y-1);
clip_rect.width = (unsigned short)(w+2);
clip_rect.height = (unsigned short)(h+2);
XSetClipRectangles(surf->dpy, surf->gc, 0, 0, &clip_rect, 1, Unsorted);
#ifdef NK_XLIB_USE_XFT
XftDrawSetClipRectangles(surf->ftdraw, 0, 0, &clip_rect, 1);
#endif
return;
}
NK_INTERN void
nk_xsurf_stroke_line(XSurface *surf, short x0, short y0, short x1,
short y1, unsigned int line_thickness, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
XDrawLine(surf->dpy, surf->drawable, surf->gc, (int)x0, (int)y0, (int)x1, (int)y1);
XSetLineAttributes(surf->dpy, surf->gc, 1, LineSolid, CapButt, JoinMiter);
}
NK_INTERN void
nk_xsurf_stroke_rect(XSurface* surf, short x, short y, unsigned short w,
unsigned short h, unsigned short r, unsigned short line_thickness, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
if (r == 0) {XDrawRectangle(surf->dpy, surf->drawable, surf->gc, x, y, w, h);return;}
{short xc = x + r;
short yc = y + r;
short wc = (short)(w - 2 * r);
short hc = (short)(h - 2 * r);
XDrawLine(surf->dpy, surf->drawable, surf->gc, xc, y, xc+wc, y);
XDrawLine(surf->dpy, surf->drawable, surf->gc, x+w, yc, x+w, yc+hc);
XDrawLine(surf->dpy, surf->drawable, surf->gc, xc, y+h, xc+wc, y+h);
XDrawLine(surf->dpy, surf->drawable, surf->gc, x, yc, x, yc+hc);
XDrawArc(surf->dpy, surf->drawable, surf->gc, xc + wc - r, y,
(unsigned)r*2, (unsigned)r*2, 0 * 64, 90 * 64);
XDrawArc(surf->dpy, surf->drawable, surf->gc, x, y,
(unsigned)r*2, (unsigned)r*2, 90 * 64, 90 * 64);
XDrawArc(surf->dpy, surf->drawable, surf->gc, x, yc + hc - r,
(unsigned)r*2, (unsigned)2*r, 180 * 64, 90 * 64);
XDrawArc(surf->dpy, surf->drawable, surf->gc, xc + wc - r, yc + hc - r,
(unsigned)r*2, (unsigned)2*r, -90 * 64, 90 * 64);}
XSetLineAttributes(surf->dpy, surf->gc, 1, LineSolid, CapButt, JoinMiter);
}
NK_INTERN void
nk_xsurf_fill_rect(XSurface* surf, short x, short y, unsigned short w,
unsigned short h, unsigned short r, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
if (r == 0) {XFillRectangle(surf->dpy, surf->drawable, surf->gc, x, y, w, h); return;}
{short xc = x + r;
short yc = y + r;
short wc = (short)(w - 2 * r);
short hc = (short)(h - 2 * r);
XPoint pnts[12];
pnts[0].x = x;
pnts[0].y = yc;
pnts[1].x = xc;
pnts[1].y = yc;
pnts[2].x = xc;
pnts[2].y = y;
pnts[3].x = xc + wc;
pnts[3].y = y;
pnts[4].x = xc + wc;
pnts[4].y = yc;
pnts[5].x = x + w;
pnts[5].y = yc;
pnts[6].x = x + w;
pnts[6].y = yc + hc;
pnts[7].x = xc + wc;
pnts[7].y = yc + hc;
pnts[8].x = xc + wc;
pnts[8].y = y + h;
pnts[9].x = xc;
pnts[9].y = y + h;
pnts[10].x = xc;
pnts[10].y = yc + hc;
pnts[11].x = x;
pnts[11].y = yc + hc;
XFillPolygon(surf->dpy, surf->drawable, surf->gc, pnts, 12, Convex, CoordModeOrigin);
XFillArc(surf->dpy, surf->drawable, surf->gc, xc + wc - r, y,
(unsigned)r*2, (unsigned)r*2, 0 * 64, 90 * 64);
XFillArc(surf->dpy, surf->drawable, surf->gc, x, y,
(unsigned)r*2, (unsigned)r*2, 90 * 64, 90 * 64);
XFillArc(surf->dpy, surf->drawable, surf->gc, x, yc + hc - r,
(unsigned)r*2, (unsigned)2*r, 180 * 64, 90 * 64);
XFillArc(surf->dpy, surf->drawable, surf->gc, xc + wc - r, yc + hc - r,
(unsigned)r*2, (unsigned)2*r, -90 * 64, 90 * 64);}
}
NK_INTERN void
nk_xsurf_fill_triangle(XSurface *surf, short x0, short y0, short x1,
short y1, short x2, short y2, struct nk_color col)
{
XPoint pnts[3];
unsigned long c = nk_color_from_byte(&col.r);
pnts[0].x = (short)x0;
pnts[0].y = (short)y0;
pnts[1].x = (short)x1;
pnts[1].y = (short)y1;
pnts[2].x = (short)x2;
pnts[2].y = (short)y2;
XSetForeground(surf->dpy, surf->gc, c);
XFillPolygon(surf->dpy, surf->drawable, surf->gc, pnts, 3, Convex, CoordModeOrigin);
}
NK_INTERN void
nk_xsurf_stroke_triangle(XSurface *surf, short x0, short y0, short x1,
short y1, short x2, short y2, unsigned short line_thickness, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
XDrawLine(surf->dpy, surf->drawable, surf->gc, x0, y0, x1, y1);
XDrawLine(surf->dpy, surf->drawable, surf->gc, x1, y1, x2, y2);
XDrawLine(surf->dpy, surf->drawable, surf->gc, x2, y2, x0, y0);
XSetLineAttributes(surf->dpy, surf->gc, 1, LineSolid, CapButt, JoinMiter);
}
NK_INTERN void
nk_xsurf_fill_polygon(XSurface *surf, const struct nk_vec2i *pnts, int count,
struct nk_color col)
{
int i = 0;
#define MAX_POINTS 128
XPoint xpnts[MAX_POINTS];
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
for (i = 0; i < count && i < MAX_POINTS; ++i) {
xpnts[i].x = pnts[i].x;
xpnts[i].y = pnts[i].y;
}
XFillPolygon(surf->dpy, surf->drawable, surf->gc, xpnts, count, Convex, CoordModeOrigin);
#undef MAX_POINTS
}
NK_INTERN void
nk_xsurf_stroke_polygon(XSurface *surf, const struct nk_vec2i *pnts, int count,
unsigned short line_thickness, struct nk_color col)
{
int i = 0;
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
for (i = 1; i < count; ++i)
XDrawLine(surf->dpy, surf->drawable, surf->gc, pnts[i-1].x, pnts[i-1].y, pnts[i].x, pnts[i].y);
XDrawLine(surf->dpy, surf->drawable, surf->gc, pnts[count-1].x, pnts[count-1].y, pnts[0].x, pnts[0].y);
XSetLineAttributes(surf->dpy, surf->gc, 1, LineSolid, CapButt, JoinMiter);
}
NK_INTERN void
nk_xsurf_stroke_polyline(XSurface *surf, const struct nk_vec2i *pnts,
int count, unsigned short line_thickness, struct nk_color col)
{
int i = 0;
unsigned long c = nk_color_from_byte(&col.r);
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
XSetForeground(surf->dpy, surf->gc, c);
for (i = 0; i < count-1; ++i)
XDrawLine(surf->dpy, surf->drawable, surf->gc, pnts[i].x, pnts[i].y, pnts[i+1].x, pnts[i+1].y);
XSetLineAttributes(surf->dpy, surf->gc, 1, LineSolid, CapButt, JoinMiter);
}
NK_INTERN void
nk_xsurf_fill_circle(XSurface *surf, short x, short y, unsigned short w,
unsigned short h, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
XFillArc(surf->dpy, surf->drawable, surf->gc, (int)x, (int)y,
(unsigned)w, (unsigned)h, 0, 360 * 64);
}
NK_INTERN void
nk_xsurf_stroke_circle(XSurface *surf, short x, short y, unsigned short w,
unsigned short h, unsigned short line_thickness, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
XSetForeground(surf->dpy, surf->gc, c);
XDrawArc(surf->dpy, surf->drawable, surf->gc, (int)x, (int)y,
(unsigned)w, (unsigned)h, 0, 360 * 64);
XSetLineAttributes(surf->dpy, surf->gc, 1, LineSolid, CapButt, JoinMiter);
}
NK_INTERN void
nk_xsurf_stroke_arc(XSurface *surf, short cx, short cy, unsigned short radius,
float a_min, float a_max, unsigned short line_thickness, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
XSetForeground(surf->dpy, surf->gc, c);
XDrawArc(surf->dpy, surf->drawable, surf->gc, (int)(cx - radius), (int)(cy - radius),
(unsigned)(radius * 2), (unsigned)(radius * 2),
(int)(a_min * 180 * 64 / NK_PI), (int)(a_max * 180 * 64 / NK_PI));
}
NK_INTERN void
nk_xsurf_fill_arc(XSurface *surf, short cx, short cy, unsigned short radius,
float a_min, float a_max, struct nk_color col)
{
unsigned long c = nk_color_from_byte(&col.r);
XSetForeground(surf->dpy, surf->gc, c);
XFillArc(surf->dpy, surf->drawable, surf->gc, (int)(cx - radius), (int)(cy - radius),
(unsigned)(radius * 2), (unsigned)(radius * 2),
(int)(a_min * 180 * 64 / NK_PI), (int)(a_max * 180 * 64 / NK_PI));
}
NK_INTERN void
nk_xsurf_stroke_curve(XSurface *surf, struct nk_vec2i p1,
struct nk_vec2i p2, struct nk_vec2i p3, struct nk_vec2i p4,
unsigned int num_segments, unsigned short line_thickness, struct nk_color col)
{
unsigned int i_step;
float t_step;
struct nk_vec2i last = p1;
XSetLineAttributes(surf->dpy, surf->gc, line_thickness, LineSolid, CapButt, JoinMiter);
num_segments = NK_MAX(num_segments, 1);
t_step = 1.0f/(float)num_segments;
for (i_step = 1; i_step <= num_segments; ++i_step) {
float t = t_step * (float)i_step;
float u = 1.0f - t;
float w1 = u*u*u;
float w2 = 3*u*u*t;
float w3 = 3*u*t*t;
float w4 = t * t *t;
float x = w1 * p1.x + w2 * p2.x + w3 * p3.x + w4 * p4.x;
float y = w1 * p1.y + w2 * p2.y + w3 * p3.y + w4 * p4.y;
nk_xsurf_stroke_line(surf, last.x, last.y, (short)x, (short)y, line_thickness,col);
last.x = (short)x; last.y = (short)y;
}
XSetLineAttributes(surf->dpy, surf->gc, 1, LineSolid, CapButt, JoinMiter);
}
NK_INTERN void
nk_xsurf_draw_text(XSurface *surf, short x, short y, const char *text, int len,
XFont *font, struct nk_color cfg)
{
#ifdef NK_XLIB_USE_XFT
XRenderColor xrc;
XftColor color;
#else
unsigned long fg = nk_color_from_byte(&cfg.r);
#endif
int tx, ty;
if(!text || !font || !len) return;
tx = (int)x;
ty = (int)y + font->ascent;
#ifdef NK_XLIB_USE_XFT
xrc.red = cfg.r * 257;
xrc.green = cfg.g * 257;
xrc.blue = cfg.b * 257;
xrc.alpha = cfg.a * 257;
XftColorAllocValue(surf->dpy, xlib.vis, xlib.cmap, &xrc, &color);
XftDrawStringUtf8(surf->ftdraw, &color, font->ft, tx, ty, (FcChar8*)text, len);
XftColorFree(surf->dpy, xlib.vis, xlib.cmap, &color);
#else
XSetForeground(surf->dpy, surf->gc, fg);
if(font->set) XmbDrawString(surf->dpy,surf->drawable, font->set, surf->gc, tx, ty, (const char*)text, (int)len);
else XDrawString(surf->dpy, surf->drawable, surf->gc, tx, ty, (const char*)text, (int)len);
#endif
return;
}
#ifdef NK_XLIB_INCLUDE_STB_IMAGE
NK_INTERN struct nk_image
nk_stbi_image_to_xsurf(unsigned char *data, int width, int height, int channels) {
XSurface *surf = xlib.surf;
struct nk_image img;
int bpl = channels;
long i, isize = width*height*channels;
XImageWithAlpha *aimage = (XImageWithAlpha*)calloc( 1, sizeof(XImageWithAlpha) );
int depth = DefaultDepth(surf->dpy, surf->screen);
if (data == NULL) return nk_image_id(0);
if (aimage == NULL) return nk_image_id(0);
switch (depth){
case 24:
bpl = 4;
break;
case 16:
case 15:
bpl = 2;
break;
default:
bpl = 1;
break;
}
/* rgba to bgra */
if (channels >= 3){
for (i=0; i < isize; i += channels) {
unsigned char red = data[i+2];
unsigned char blue = data[i];
data[i] = red;
data[i+2] = blue;
}
}
if (channels == 4){
const unsigned alpha_treshold = 127;
aimage->clipMask = XCreatePixmap(surf->dpy, surf->drawable, width, height, 1);
if( aimage->clipMask ){
aimage->clipMaskGC = XCreateGC(surf->dpy, aimage->clipMask, 0, 0);
XSetForeground(surf->dpy, aimage->clipMaskGC, BlackPixel(surf->dpy, surf->screen));
XFillRectangle(surf->dpy, aimage->clipMask, aimage->clipMaskGC, 0, 0, width, height);
XSetForeground(surf->dpy, aimage->clipMaskGC, WhitePixel(surf->dpy, surf->screen));
for (i=0; i < isize; i += channels){
unsigned char alpha = data[i+3];
int div = i / channels;
int x = div % width;
int y = div / width;
if( alpha > alpha_treshold )
XDrawPoint(surf->dpy, aimage->clipMask, aimage->clipMaskGC, x, y);
}
}
}
aimage->ximage = XCreateImage(surf->dpy,
CopyFromParent, depth,
ZPixmap, 0,
(char*)data,
width, height,
bpl*8, bpl * width);
img = nk_image_ptr( (void*)aimage);
img.h = height;
img.w = width;
return img;
}
NK_API struct nk_image
nk_xsurf_load_image_from_memory(const void *membuf, nk_uint membufSize)
{
int x,y,n;
unsigned char *data;
data = stbi_load_from_memory(membuf, membufSize, &x, &y, &n, 0);
return nk_stbi_image_to_xsurf(data, x, y, n);
}
NK_API struct nk_image
nk_xsurf_load_image_from_file(char const *filename)
{
int x,y,n;
unsigned char *data;
data = stbi_load(filename, &x, &y, &n, 0);
return nk_stbi_image_to_xsurf(data, x, y, n);
}
#endif /* NK_XLIB_INCLUDE_STB_IMAGE */
NK_INTERN void
nk_xsurf_draw_image(XSurface *surf, short x, short y, unsigned short w, unsigned short h,
struct nk_image img, struct nk_color col)
{
XImageWithAlpha *aimage = img.handle.ptr;
NK_UNUSED(col);
if (aimage){
if (aimage->clipMask){
XSetClipMask(surf->dpy, surf->gc, aimage->clipMask);
XSetClipOrigin(surf->dpy, surf->gc, x, y);
}
XPutImage(surf->dpy, surf->drawable, surf->gc, aimage->ximage, 0, 0, x, y, w, h);
XSetClipMask(surf->dpy, surf->gc, None);
}
}
void
nk_xsurf_image_free(struct nk_image* image)
{
XSurface *surf = xlib.surf;
XImageWithAlpha *aimage = image->handle.ptr;
if (!aimage) return;
XDestroyImage(aimage->ximage);
XFreePixmap(surf->dpy, aimage->clipMask);
XFreeGC(surf->dpy, aimage->clipMaskGC);
free(aimage);
}
NK_INTERN void
nk_xsurf_clear(XSurface *surf, unsigned long color)
{
XSetForeground(surf->dpy, surf->gc, color);
XFillRectangle(surf->dpy, surf->drawable, surf->gc, 0, 0, surf->w, surf->h);
}
NK_INTERN void
nk_xsurf_blit(Drawable target, XSurface *surf, unsigned int w, unsigned int h)
{
XCopyArea(surf->dpy, surf->drawable, target, surf->gc, 0, 0, w, h, 0, 0);
}
NK_INTERN void
nk_xsurf_del(XSurface *surf)
{
#ifdef NK_XLIB_USE_XFT
XftDrawDestroy(surf->ftdraw);
#endif
XFreePixmap(surf->dpy, surf->drawable);
XFreeGC(surf->dpy, surf->gc);
free(surf);
}
NK_API XFont*
nk_xfont_create(Display *dpy, const char *name)
{
#ifdef NK_XLIB_USE_XFT
XFont *font = (XFont*)calloc(1, sizeof(XFont));
font->ft = XftFontOpenName(dpy, XDefaultScreen(dpy), name);
if (!font->ft) {
fprintf(stderr, "missing font: %s\n", name);
return font;
}
font->ascent = font->ft->ascent;
font->descent = font->ft->descent;
font->height = font->ft->height;
#else
int n;
char *def, **missing;
XFont *font = (XFont*)calloc(1, sizeof(XFont));
font->set = XCreateFontSet(dpy, name, &missing, &n, &def);
if(missing) {
while(n--)
fprintf(stderr, "missing fontset: %s\n", missing[n]);
XFreeStringList(missing);
}
if(font->set) {
XFontStruct **xfonts;
char **font_names;
XExtentsOfFontSet(font->set);
n = XFontsOfFontSet(font->set, &xfonts, &font_names);
while(n--) {
font->ascent = NK_MAX(font->ascent, (*xfonts)->ascent);
font->descent = NK_MAX(font->descent,(*xfonts)->descent);
xfonts++;
}
} else {
if(!(font->xfont = XLoadQueryFont(dpy, name))
&& !(font->xfont = XLoadQueryFont(dpy, "fixed"))) {
free(font);
return 0;
}
font->ascent = font->xfont->ascent;
font->descent = font->xfont->descent;
}
font->height = font->ascent + font->descent;
#endif
return font;
}
NK_INTERN float
nk_xfont_get_text_width(nk_handle handle, float height, const char *text, int len)
{
XFont *font = (XFont*)handle.ptr;
#ifdef NK_XLIB_USE_XFT
XGlyphInfo g;
NK_UNUSED(height);
if(!font || !text)
return 0;
XftTextExtentsUtf8(xlib.dpy, font->ft, (FcChar8*)text, len, &g);
return g.xOff;
#else
XRectangle r;
NK_UNUSED(height);
if(!font || !text)
return 0;
if(font->set) {
XmbTextExtents(font->set, (const char*)text, len, NULL, &r);
return (float)r.width;
} else{
int w = XTextWidth(font->xfont, (const char*)text, len);
return (float)w;
}
#endif
}
NK_API void
nk_xfont_del(Display *dpy, XFont *font)
{
if(!font) return;
#ifdef NK_XLIB_USE_XFT
XftFontClose(dpy, font->ft);
#else
if(font->set)
XFreeFontSet(dpy, font->set);
else
XFreeFont(dpy, font->xfont);
#endif
free(font);
}
NK_API struct nk_context*
nk_xlib_init(XFont *xfont, Display *dpy, int screen, Window root,
#ifdef NK_XLIB_USE_XFT
Visual *vis, Colormap cmap,
#endif
unsigned int w, unsigned int h)
{
struct nk_user_font *font = &xfont->handle;
font->userdata = nk_handle_ptr(xfont);
font->height = (float)xfont->height;
font->width = nk_xfont_get_text_width;
xlib.dpy = dpy;
xlib.root = root;
#ifdef NK_XLIB_USE_XFT
xlib.vis = vis;
xlib.cmap = cmap;
#endif
if (!setlocale(LC_ALL,"")) return 0;
if (!XSupportsLocale()) return 0;
if (!XSetLocaleModifiers("@im=none")) return 0;
xlib.xa_clipboard = XInternAtom(dpy, "CLIPBOARD", False);
xlib.xa_targets = XInternAtom(dpy, "TARGETS", False);
xlib.xa_text = XInternAtom(dpy, "TEXT", False);
xlib.xa_utf8_string = XInternAtom(dpy, "UTF8_STRING", False);
/* create invisible cursor */
{static XColor dummy; char data[1] = {0};
Pixmap blank = XCreateBitmapFromData(dpy, root, data, 1, 1);
if (blank == None) return 0;
xlib.cursor = XCreatePixmapCursor(dpy, blank, blank, &dummy, &dummy, 0, 0);
XFreePixmap(dpy, blank);}
xlib.surf = nk_xsurf_create(screen, w, h);
nk_init_default(&xlib.ctx, font);
xlib.time_of_last_frame = nk_get_time();
return &xlib.ctx;
}
NK_API void
nk_xlib_set_font(XFont *xfont)
{
struct nk_user_font *font = &xfont->handle;
font->userdata = nk_handle_ptr(xfont);
font->height = (float)xfont->height;
font->width = nk_xfont_get_text_width;
nk_style_set_font(&xlib.ctx, font);
}
NK_API void
nk_xlib_push_font(XFont *xfont)
{
struct nk_user_font *font = &xfont->handle;
font->userdata = nk_handle_ptr(xfont);
font->height = (float)xfont->height;
font->width = nk_xfont_get_text_width;
nk_style_push_font(&xlib.ctx, font);
}
NK_API void
nk_xlib_paste(nk_handle handle, struct nk_text_edit* edit)
{
NK_UNUSED(handle);
/* Paste in X is asynchronous, so can not use a temporary text edit */
NK_ASSERT(edit != &xlib.ctx.text_edit && "Paste not supported for temporary editors");
xlib.clipboard_target = edit;
/* Request the contents of the primary buffer */
XConvertSelection(xlib.dpy, XA_PRIMARY, XA_STRING, XA_PRIMARY, xlib.root, CurrentTime);
}
NK_API void
nk_xlib_copy(nk_handle handle, const char* str, int len)
{
NK_UNUSED(handle);
free(xlib.clipboard_data);
xlib.clipboard_len = 0;
xlib.clipboard_data = malloc((size_t)len);
if (xlib.clipboard_data) {
memcpy(xlib.clipboard_data, str, (size_t)len);
xlib.clipboard_len = len;
XSetSelectionOwner(xlib.dpy, XA_PRIMARY, xlib.root, CurrentTime);
XSetSelectionOwner(xlib.dpy, xlib.xa_clipboard, xlib.root, CurrentTime);
}
}
NK_API int
nk_xlib_handle_event(Display *dpy, int screen, Window win, XEvent *evt)
{
struct nk_context *ctx = &xlib.ctx;
NK_UNUSED(screen);
/* optional grabbing behavior */
if (ctx->input.mouse.grab) {
XDefineCursor(xlib.dpy, xlib.root, xlib.cursor);
ctx->input.mouse.grab = 0;
} else if (ctx->input.mouse.ungrab) {
XWarpPointer(xlib.dpy, None, xlib.root, 0, 0, 0, 0,
(int)ctx->input.mouse.prev.x, (int)ctx->input.mouse.prev.y);
XUndefineCursor(xlib.dpy, xlib.root);
ctx->input.mouse.ungrab = 0;
}
if (evt->type == KeyPress || evt->type == KeyRelease)
{
/* Key handler */
int ret, down = (evt->type == KeyPress);
KeySym *code = XGetKeyboardMapping(xlib.surf->dpy, (KeyCode)evt->xkey.keycode, 1, &ret);
if (*code == XK_Shift_L || *code == XK_Shift_R) nk_input_key(ctx, NK_KEY_SHIFT, down);
else if (*code == XK_Control_L || *code == XK_Control_R) nk_input_key(ctx, NK_KEY_CTRL, down);
else if (*code == XK_Delete) nk_input_key(ctx, NK_KEY_DEL, down);
else if (*code == XK_Return) nk_input_key(ctx, NK_KEY_ENTER, down);
else if (*code == XK_Tab) nk_input_key(ctx, NK_KEY_TAB, down);
else if (*code == XK_Left) nk_input_key(ctx, NK_KEY_LEFT, down);
else if (*code == XK_Right) nk_input_key(ctx, NK_KEY_RIGHT, down);
else if (*code == XK_Up) nk_input_key(ctx, NK_KEY_UP, down);
else if (*code == XK_Down) nk_input_key(ctx, NK_KEY_DOWN, down);
else if (*code == XK_BackSpace) nk_input_key(ctx, NK_KEY_BACKSPACE, down);
else if (*code == XK_Escape) nk_input_key(ctx, NK_KEY_TEXT_RESET_MODE, down);
else if (*code == XK_Page_Up) nk_input_key(ctx, NK_KEY_SCROLL_UP, down);
else if (*code == XK_Page_Down) nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
else if (*code == XK_Home) {
nk_input_key(ctx, NK_KEY_TEXT_START, down);
nk_input_key(ctx, NK_KEY_SCROLL_START, down);
} else if (*code == XK_End) {
nk_input_key(ctx, NK_KEY_TEXT_END, down);
nk_input_key(ctx, NK_KEY_SCROLL_END, down);
} else {
if (*code == 'c' && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_COPY, down);
else if (*code == 'v' && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_PASTE, down);
else if (*code == 'x' && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_CUT, down);
else if (*code == 'z' && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_TEXT_UNDO, down);
else if (*code == 'r' && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_TEXT_REDO, down);
else if (*code == XK_Left && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
else if (*code == XK_Right && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
else if (*code == 'b' && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down);
else if (*code == 'e' && (evt->xkey.state & ControlMask))
nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down);
else {
if (*code == 'i')
nk_input_key(ctx, NK_KEY_TEXT_INSERT_MODE, down);
else if (*code == 'r')
nk_input_key(ctx, NK_KEY_TEXT_REPLACE_MODE, down);
if (down) {
char buf[32];
KeySym keysym = 0;
if (XLookupString((XKeyEvent*)evt, buf, 32, &keysym, NULL) != NoSymbol)
nk_input_glyph(ctx, buf);
}
}
}
XFree(code);
return 1;
} else if (evt->type == ButtonPress || evt->type == ButtonRelease) {
/* Button handler */
int down = (evt->type == ButtonPress);
const int x = evt->xbutton.x, y = evt->xbutton.y;
if (evt->xbutton.button == Button1) {
if (down) { /* Double-Click Button handler */
float dt = nk_get_time() - xlib.last_button_click;
if (dt > NK_X11_DOUBLE_CLICK_LO && dt < NK_X11_DOUBLE_CLICK_HI)
nk_input_button(ctx, NK_BUTTON_DOUBLE, x, y, nk_true);
xlib.last_button_click = nk_get_time();
} else nk_input_button(ctx, NK_BUTTON_DOUBLE, x, y, nk_false);
nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
} else if (evt->xbutton.button == Button2)
nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
else if (evt->xbutton.button == Button3)
nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
else if (evt->xbutton.button == Button4)
nk_input_scroll(ctx, nk_vec2(0, 1.0f));
else if (evt->xbutton.button == Button5)
nk_input_scroll(ctx, nk_vec2(0, -1.0f));
else return 0;
return 1;
} else if (evt->type == MotionNotify) {
/* Mouse motion handler */
const int x = evt->xmotion.x, y = evt->xmotion.y;
nk_input_motion(ctx, x, y);
if (ctx->input.mouse.grabbed) {
ctx->input.mouse.pos.x = ctx->input.mouse.prev.x;
ctx->input.mouse.pos.y = ctx->input.mouse.prev.y;
XWarpPointer(xlib.dpy, None, xlib.surf->root, 0, 0, 0, 0, (int)ctx->input.mouse.pos.x, (int)ctx->input.mouse.pos.y);
}
return 1;
} else if (evt->type == Expose || evt->type == ConfigureNotify) {
/* Window resize handler */
unsigned int width, height;
XWindowAttributes attr;
XGetWindowAttributes(dpy, win, &attr);
width = (unsigned int)attr.width;
height = (unsigned int)attr.height;
nk_xsurf_resize(xlib.surf, width, height);
return 1;
} else if (evt->type == KeymapNotify) {
XRefreshKeyboardMapping(&evt->xmapping);
return 1;
} else if (evt->type == SelectionClear) {
free(xlib.clipboard_data);
xlib.clipboard_data = NULL;
xlib.clipboard_len = 0;
return 1;
} else if (evt->type == SelectionRequest) {
XEvent reply;
reply.xselection.type = SelectionNotify;
reply.xselection.requestor = evt->xselectionrequest.requestor;
reply.xselection.selection = evt->xselectionrequest.selection;
reply.xselection.target = evt->xselectionrequest.target;
reply.xselection.property = None; /* Default refuse */
reply.xselection.time = evt->xselectionrequest.time;
if (reply.xselection.target == xlib.xa_targets) {
Atom target_list[4];
target_list[0] = xlib.xa_targets;
target_list[1] = xlib.xa_text;
target_list[2] = xlib.xa_utf8_string;
target_list[3] = XA_STRING;
reply.xselection.property = evt->xselectionrequest.property;
XChangeProperty(evt->xselection.display,evt->xselectionrequest.requestor,
reply.xselection.property, XA_ATOM, 32, PropModeReplace,
(unsigned char*)&target_list, 4);
} else if (xlib.clipboard_data && (reply.xselection.target == xlib.xa_text ||
reply.xselection.target == xlib.xa_utf8_string || reply.xselection.target == XA_STRING)) {
reply.xselection.property = evt->xselectionrequest.property;
XChangeProperty(evt->xselection.display,evt->xselectionrequest.requestor,
reply.xselection.property, reply.xselection.target, 8, PropModeReplace,
(unsigned char*)xlib.clipboard_data, xlib.clipboard_len);
}
XSendEvent(evt->xselection.display, evt->xselectionrequest.requestor, True, 0, &reply);
XFlush(evt->xselection.display);
return 1;
} else if (evt->type == SelectionNotify && xlib.clipboard_target) {
if ((evt->xselection.target != XA_STRING) &&
(evt->xselection.target != xlib.xa_utf8_string) &&
(evt->xselection.target != xlib.xa_text))
return 1;
{Atom actual_type;
int actual_format;
unsigned long pos = 0, len, remain;
unsigned char* data = 0;
do {
XGetWindowProperty(dpy, win, XA_PRIMARY, (int)pos, 1024, False,
AnyPropertyType, &actual_type, &actual_format, &len, &remain, &data);
if (len && data)
nk_textedit_text(xlib.clipboard_target, (char*)data, (int)len);
if (data != 0) XFree(data);
pos += (len * (unsigned long)actual_format) / 32;
} while (remain != 0);}
return 1;
}
return 0;
}
NK_API void
nk_xlib_shutdown(void)
{
nk_xsurf_del(xlib.surf);
nk_free(&xlib.ctx);
XFreeCursor(xlib.dpy, xlib.cursor);
memset(&xlib, 0, sizeof(xlib));
}
NK_API void
nk_xlib_render(Drawable screen, struct nk_color clear)
{
const struct nk_command *cmd;
struct nk_context *ctx = &xlib.ctx;
XSurface *surf = xlib.surf;
double now = nk_get_time();
xlib.ctx.delta_time_seconds = now - xlib.time_of_last_frame;
xlib.time_of_last_frame = now;
nk_xsurf_clear(xlib.surf, nk_color_from_byte(&clear.r));
nk_foreach(cmd, &xlib.ctx)
{
switch (cmd->type) {
case NK_COMMAND_NOP: break;
case NK_COMMAND_SCISSOR: {
const struct nk_command_scissor *s =(const struct nk_command_scissor*)cmd;
nk_xsurf_scissor(surf, s->x, s->y, s->w, s->h);
} break;
case NK_COMMAND_LINE: {
const struct nk_command_line *l = (const struct nk_command_line *)cmd;
nk_xsurf_stroke_line(surf, l->begin.x, l->begin.y, l->end.x,
l->end.y, l->line_thickness, l->color);
} break;
case NK_COMMAND_RECT: {
const struct nk_command_rect *r = (const struct nk_command_rect *)cmd;
nk_xsurf_stroke_rect(surf, r->x, r->y, NK_MAX(r->w -r->line_thickness, 0),
NK_MAX(r->h - r->line_thickness, 0), (unsigned short)r->rounding,
r->line_thickness, r->color);
} break;
case NK_COMMAND_RECT_FILLED: {
const struct nk_command_rect_filled *r = (const struct nk_command_rect_filled *)cmd;
nk_xsurf_fill_rect(surf, r->x, r->y, r->w, r->h,
(unsigned short)r->rounding, r->color);
} break;
case NK_COMMAND_CIRCLE: {
const struct nk_command_circle *c = (const struct nk_command_circle *)cmd;
nk_xsurf_stroke_circle(surf, c->x, c->y, c->w, c->h, c->line_thickness, c->color);
} break;
case NK_COMMAND_CIRCLE_FILLED: {
const struct nk_command_circle_filled *c = (const struct nk_command_circle_filled *)cmd;
nk_xsurf_fill_circle(surf, c->x, c->y, c->w, c->h, c->color);
} break;
case NK_COMMAND_ARC: {
const struct nk_command_arc *a = (const struct nk_command_arc *)cmd;
nk_xsurf_stroke_arc(surf, a->cx, a->cy, a->r, a->a[0], a->a[1], a->line_thickness, a->color);
} break;
case NK_COMMAND_ARC_FILLED: {
const struct nk_command_arc_filled *a = (const struct nk_command_arc_filled *)cmd;
nk_xsurf_fill_arc(surf, a->cx, a->cy, a->r, a->a[0], a->a[1], a->color);
} break;
case NK_COMMAND_TRIANGLE: {
const struct nk_command_triangle*t = (const struct nk_command_triangle*)cmd;
nk_xsurf_stroke_triangle(surf, t->a.x, t->a.y, t->b.x, t->b.y,
t->c.x, t->c.y, t->line_thickness, t->color);
} break;
case NK_COMMAND_TRIANGLE_FILLED: {
const struct nk_command_triangle_filled *t = (const struct nk_command_triangle_filled *)cmd;
nk_xsurf_fill_triangle(surf, t->a.x, t->a.y, t->b.x, t->b.y,
t->c.x, t->c.y, t->color);
} break;
case NK_COMMAND_POLYGON: {
const struct nk_command_polygon *p =(const struct nk_command_polygon*)cmd;
nk_xsurf_stroke_polygon(surf, p->points, p->point_count, p->line_thickness,p->color);
} break;
case NK_COMMAND_POLYGON_FILLED: {
const struct nk_command_polygon_filled *p = (const struct nk_command_polygon_filled *)cmd;
nk_xsurf_fill_polygon(surf, p->points, p->point_count, p->color);
} break;
case NK_COMMAND_POLYLINE: {
const struct nk_command_polyline *p = (const struct nk_command_polyline *)cmd;
nk_xsurf_stroke_polyline(surf, p->points, p->point_count, p->line_thickness, p->color);
} break;
case NK_COMMAND_TEXT: {
const struct nk_command_text *t = (const struct nk_command_text*)cmd;
nk_xsurf_draw_text(surf, t->x, t->y, (const char*)t->string, t->length,
(XFont*)t->font->userdata.ptr, t->foreground);
} break;
case NK_COMMAND_CURVE: {
const struct nk_command_curve *q = (const struct nk_command_curve *)cmd;
nk_xsurf_stroke_curve(surf, q->begin, q->ctrl[0], q->ctrl[1],
q->end, 22, q->line_thickness, q->color);
} break;
case NK_COMMAND_IMAGE: {
const struct nk_command_image *i = (const struct nk_command_image *)cmd;
nk_xsurf_draw_image(surf, i->x, i->y, i->w, i->h, i->img, i->col);
} break;
case NK_COMMAND_RECT_MULTI_COLOR:
case NK_COMMAND_CUSTOM:
default: break;
}
}
nk_clear(ctx);
nk_xsurf_blit(screen, surf, surf->w, surf->h);
}
#endif
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