02718210e6
Nuklear now has three different property versions for int, float and added by this commit a double version. Internally an additional change happend. Now the type of the property is actually taken into account and floating pointer errors due to casting are less of an issue.
323 lines
12 KiB
C
323 lines
12 KiB
C
/* nuklear - v1.09 - public domain */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <string.h>
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#include <math.h>
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#include <assert.h>
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#include <math.h>
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#include <time.h>
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#include <limits.h>
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#include <GL/glx.h>
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#include <GL/glxext.h>
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#define NK_INCLUDE_FIXED_TYPES
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#define NK_INCLUDE_STANDARD_IO
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#define NK_INCLUDE_STANDARD_VARARGS
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#define NK_INCLUDE_DEFAULT_ALLOCATOR
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#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
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#define NK_INCLUDE_FONT_BAKING
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#define NK_INCLUDE_DEFAULT_FONT
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#define NK_IMPLEMENTATION
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#define NK_XLIB_GL2_IMPLEMENTATION
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#include "../../nuklear.h"
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#include "nuklear_xlib_gl2.h"
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#define WINDOW_WIDTH 1200
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#define WINDOW_HEIGHT 800
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#define MAX_VERTEX_BUFFER 512 * 1024
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#define MAX_ELEMENT_BUFFER 128 * 1024
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#define UNUSED(a) (void)a
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define MAX(a,b) ((a) < (b) ? (b) : (a))
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#define LEN(a) (sizeof(a)/sizeof(a)[0])
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/* ===============================================================
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*
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* EXAMPLE
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*
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* ===============================================================*/
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/* This are some code examples to provide a small overview of what can be
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* done with this library. To try out an example uncomment the include
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* and the corresponding function. */
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/*#include "../style.c"*/
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/*#include "../calculator.c"*/
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/*#include "../overview.c"*/
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/*#include "../node_editor.c"*/
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/* ===============================================================
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*
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* DEMO
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*
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* ===============================================================*/
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struct XWindow {
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Display *dpy;
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Window win;
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XVisualInfo *vis;
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Colormap cmap;
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XSetWindowAttributes swa;
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XWindowAttributes attr;
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GLXFBConfig fbc;
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int width, height;
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};
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static int gl_err = FALSE;
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static int gl_error_handler(Display *dpy, XErrorEvent *ev)
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{UNUSED((dpy, ev)); gl_err = TRUE;return 0;}
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static void
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die(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fputs("\n", stderr);
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exit(EXIT_FAILURE);
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}
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static int
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has_extension(const char *string, const char *ext)
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{
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const char *start, *where, *term;
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where = strchr(ext, ' ');
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if (where || *ext == '\0')
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return FALSE;
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for (start = string;;) {
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where = strstr((const char*)start, ext);
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if (!where) break;
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term = where + strlen(ext);
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if (where == start || *(where - 1) == ' ') {
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if (*term == ' ' || *term == '\0')
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return TRUE;
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}
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start = term;
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}
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return FALSE;
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}
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int main(int argc, char **argv)
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{
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/* Platform */
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int running = 1;
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struct XWindow win;
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GLXContext glContext;
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struct nk_context *ctx;
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struct nk_color background;
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memset(&win, 0, sizeof(win));
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win.dpy = XOpenDisplay(NULL);
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if (!win.dpy) die("Failed to open X display\n");
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{
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/* check glx version */
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int glx_major, glx_minor;
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if (!glXQueryVersion(win.dpy, &glx_major, &glx_minor))
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die("[X11]: Error: Failed to query OpenGL version\n");
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if ((glx_major == 1 && glx_minor < 3) || (glx_major < 1))
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die("[X11]: Error: Invalid GLX version!\n");
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}
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{
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/* find and pick matching framebuffer visual */
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int fb_count;
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static GLint attr[] = {
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GLX_X_RENDERABLE, True,
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GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
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GLX_RENDER_TYPE, GLX_RGBA_BIT,
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GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR,
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GLX_RED_SIZE, 8,
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GLX_GREEN_SIZE, 8,
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GLX_BLUE_SIZE, 8,
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GLX_ALPHA_SIZE, 8,
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GLX_DEPTH_SIZE, 24,
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GLX_STENCIL_SIZE, 8,
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GLX_DOUBLEBUFFER, True,
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None
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};
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GLXFBConfig *fbc;
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fbc = glXChooseFBConfig(win.dpy, DefaultScreen(win.dpy), attr, &fb_count);
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if (!fbc) die("[X11]: Error: failed to retrieve framebuffer configuration\n");
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{
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/* pick framebuffer with most samples per pixel */
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int i;
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int fb_best = -1, best_num_samples = -1;
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for (i = 0; i < fb_count; ++i) {
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XVisualInfo *vi = glXGetVisualFromFBConfig(win.dpy, fbc[i]);
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if (vi) {
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int sample_buffer, samples;
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glXGetFBConfigAttrib(win.dpy, fbc[i], GLX_SAMPLE_BUFFERS, &sample_buffer);
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glXGetFBConfigAttrib(win.dpy, fbc[i], GLX_SAMPLES, &samples);
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if ((fb_best < 0) || (sample_buffer && samples > best_num_samples))
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fb_best = i; best_num_samples = samples;
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}
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}
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win.fbc = fbc[fb_best];
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XFree(fbc);
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win.vis = glXGetVisualFromFBConfig(win.dpy, win.fbc);
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}
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}
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{
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/* create window */
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win.cmap = XCreateColormap(win.dpy, RootWindow(win.dpy, win.vis->screen), win.vis->visual, AllocNone);
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win.swa.colormap = win.cmap;
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win.swa.background_pixmap = None;
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win.swa.border_pixel = 0;
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win.swa.event_mask =
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ExposureMask | KeyPressMask | KeyReleaseMask |
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ButtonPress | ButtonReleaseMask| ButtonMotionMask |
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Button1MotionMask | Button3MotionMask | Button4MotionMask | Button5MotionMask|
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PointerMotionMask| StructureNotifyMask;
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win.win = XCreateWindow(win.dpy, RootWindow(win.dpy, win.vis->screen), 0, 0,
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WINDOW_WIDTH, WINDOW_HEIGHT, 0, win.vis->depth, InputOutput,
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win.vis->visual, CWBorderPixel|CWColormap|CWEventMask, &win.swa);
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if (!win.win) die("[X11]: Failed to create window\n");
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XFree(win.vis);
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XStoreName(win.dpy, win.win, "Demo");
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XMapWindow(win.dpy, win.win);
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}
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{
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/* create opengl context */
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typedef GLXContext(*glxCreateContext)(Display*, GLXFBConfig, GLXContext, Bool, const int*);
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int(*old_handler)(Display*, XErrorEvent*) = XSetErrorHandler(gl_error_handler);
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const char *extensions_str = glXQueryExtensionsString(win.dpy, DefaultScreen(win.dpy));
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glxCreateContext create_context = (glxCreateContext)
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glXGetProcAddressARB((const GLubyte*)"glXCreateContextAttribsARB");
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gl_err = FALSE;
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if (!has_extension(extensions_str, "GLX_ARB_create_context") || !create_context) {
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fprintf(stdout, "[X11]: glXCreateContextAttribARB() not found...\n");
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fprintf(stdout, "[X11]: ... using old-style GLX context\n");
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glContext = glXCreateNewContext(win.dpy, win.fbc, GLX_RGBA_TYPE, 0, True);
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} else {
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GLint attr[] = {
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GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
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GLX_CONTEXT_MINOR_VERSION_ARB, 0,
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None
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};
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glContext = create_context(win.dpy, win.fbc, 0, True, attr);
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XSync(win.dpy, False);
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if (gl_err || !glContext) {
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/* Could not create GL 3.0 context. Fallback to old 2.x context.
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* If a version below 3.0 is requested, implementations will
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* return the newest context version compatible with OpenGL
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* version less than version 3.0.*/
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attr[1] = 1; attr[3] = 0;
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gl_err = FALSE;
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fprintf(stdout, "[X11] Failed to create OpenGL 3.0 context\n");
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fprintf(stdout, "[X11] ... using old-style GLX context!\n");
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glContext = create_context(win.dpy, win.fbc, 0, True, attr);
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}
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}
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XSync(win.dpy, False);
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XSetErrorHandler(old_handler);
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if (gl_err || !glContext)
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die("[X11]: Failed to create an OpenGL context\n");
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glXMakeCurrent(win.dpy, win.win, glContext);
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}
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ctx = nk_x11_init(win.dpy, win.win);
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/* Load Fonts: if none of these are loaded a default font will be used */
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/* Load Cursor: if you uncomment cursor loading please hide the cursor */
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{struct nk_font_atlas *atlas;
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nk_x11_font_stash_begin(&atlas);
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/*struct nk_font *droid = nk_font_atlas_add_from_file(atlas, "../../../extra_font/DroidSans.ttf", 14, 0);*/
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/*struct nk_font *roboto = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Roboto-Regular.ttf", 14, 0);*/
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/*struct nk_font *future = nk_font_atlas_add_from_file(atlas, "../../../extra_font/kenvector_future_thin.ttf", 13, 0);*/
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/*struct nk_font *clean = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyClean.ttf", 12, 0);*/
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/*struct nk_font *tiny = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyTiny.ttf", 10, 0);*/
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/*struct nk_font *cousine = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13, 0);*/
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nk_x11_font_stash_end();
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/*nk_style_load_all_cursors(ctx, atlas->cursors);*/
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/*nk_style_set_font(ctx, &droid->handle);*/}
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/* style.c */
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/*set_style(ctx, THEME_WHITE);*/
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/*set_style(ctx, THEME_RED);*/
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/*set_style(ctx, THEME_BLUE);*/
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/*set_style(ctx, THEME_DARK);*/
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background = nk_rgb(28,48,62);
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while (running)
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{
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/* Input */
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XEvent evt;
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nk_input_begin(ctx);
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while (XCheckWindowEvent(win.dpy, win.win, win.swa.event_mask, &evt)){
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if (XFilterEvent(&evt, win.win)) continue;
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nk_x11_handle_event(&evt);
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}
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nk_input_end(ctx);
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/* GUI */
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{struct nk_panel layout;
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if (nk_begin(ctx, &layout, "Demo", nk_rect(50, 50, 200, 200),
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NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
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NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
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{
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enum {EASY, HARD};
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static int op = EASY;
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static int property = 20;
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nk_layout_row_static(ctx, 30, 80, 1);
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if (nk_button_label(ctx, "button"))
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fprintf(stdout, "button pressed\n");
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nk_layout_row_dynamic(ctx, 30, 2);
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if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
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if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
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nk_layout_row_dynamic(ctx, 25, 1);
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nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
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{struct nk_panel combo;
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nk_layout_row_dynamic(ctx, 20, 1);
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nk_label(ctx, "background:", NK_TEXT_LEFT);
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nk_layout_row_dynamic(ctx, 25, 1);
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if (nk_combo_begin_color(ctx, &combo, background, 400)) {
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nk_layout_row_dynamic(ctx, 120, 1);
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background = nk_color_picker(ctx, background, NK_RGBA);
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nk_layout_row_dynamic(ctx, 25, 1);
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background.r = (nk_byte)nk_propertyi(ctx, "#R:", 0, background.r, 255, 1,1);
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background.g = (nk_byte)nk_propertyi(ctx, "#G:", 0, background.g, 255, 1,1);
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background.b = (nk_byte)nk_propertyi(ctx, "#B:", 0, background.b, 255, 1,1);
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background.a = (nk_byte)nk_propertyi(ctx, "#A:", 0, background.a, 255, 1,1);
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nk_combo_end(ctx);
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}}
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}
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nk_end(ctx);}
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if (nk_window_is_closed(ctx, "Demo")) break;
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/* -------------- EXAMPLES ---------------- */
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/*calculator(ctx);*/
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/*overview(ctx);*/
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/*node_editor(ctx);*/
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/* ----------------------------------------- */
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/* Draw */
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{float bg[4];
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nk_color_fv(bg, background);
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XGetWindowAttributes(win.dpy, win.win, &win.attr);
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glViewport(0, 0, win.width, win.height);
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glClear(GL_COLOR_BUFFER_BIT);
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glClearColor(bg[0], bg[1], bg[2], bg[3]);
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/* IMPORTANT: `nk_x11_render` modifies some global OpenGL state
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* with blending, scissor, face culling, depth test and viewport and
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* defaults everything back into a default state.
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* Make sure to either a.) save and restore or b.) reset your own state after
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* rendering the UI. */
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nk_x11_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_BUFFER, MAX_ELEMENT_BUFFER);
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glXSwapBuffers(win.dpy, win.win);}
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}
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nk_x11_shutdown();
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glXMakeCurrent(win.dpy, 0, 0);
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glXDestroyContext(win.dpy, glContext);
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XUnmapWindow(win.dpy, win.win);
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XFreeColormap(win.dpy, win.cmap);
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XDestroyWindow(win.dpy, win.win);
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XCloseDisplay(win.dpy);
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return 0;
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}
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