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Merge branch 'siro20-nuklear_softrast'

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vurtun 2017-10-07 14:31:05 +02:00
commit 24a7536273
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13
demo/x11_rawfb/Makefile Normal file
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# Install
BIN = zahnrad
# Flags
CFLAGS = -std=c89 -pedantic -O2 -Wunused -DRAWFB_XRGB_8888
SRC = main.c
OBJ = $(SRC:.c=.o)
$(BIN):
@mkdir -p bin
rm -f bin/$(BIN) $(OBJS)
$(CC) $(SRC) $(CFLAGS) -D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L -o bin/$(BIN) -lX11 -lXext -lm

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demo/x11_rawfb/main.c Normal file
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/* nuklear - v1.17 - public domain */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <limits.h>
#include <math.h>
#include <sys/time.h>
#include <unistd.h>
#include <time.h>
#define RAWFB_RGBX_8888
#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_STANDARD_IO
#define NK_INCLUDE_STANDARD_VARARGS
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_IMPLEMENTATION
#define NK_XLIBSHM_IMPLEMENTATION
#define NK_RAWFB_IMPLEMENTATION
#define NK_INCLUDE_FONT_BAKING
#define NK_INCLUDE_DEFAULT_FONT
#define NK_INCLUDE_SOFTWARE_FONT
#include "../../nuklear.h"
#include "nuklear_rawfb.h"
#include "nuklear_xlib.h"
#define DTIME 20
#define WINDOW_WIDTH 800
#define WINDOW_HEIGHT 600
#define UNUSED(a) (void)a
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define MAX(a,b) ((a) < (b) ? (b) : (a))
#define LEN(a) (sizeof(a)/sizeof(a)[0])
typedef struct XWindow XWindow;
struct XWindow {
Display *dpy;
Window root;
Visual *vis;
Colormap cmap;
XWindowAttributes attr;
XSetWindowAttributes swa;
Window win;
int screen;
unsigned int width;
unsigned int height;
};
static void
die(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fputs("\n", stderr);
exit(EXIT_FAILURE);
}
static void*
xcalloc(size_t siz, size_t n)
{
void *ptr = calloc(siz, n);
if (!ptr) die("Out of memory\n");
return ptr;
}
static long
timestamp(void)
{
struct timeval tv;
if (gettimeofday(&tv, NULL) < 0) return 0;
return (long)((long)tv.tv_sec * 1000 + (long)tv.tv_usec/1000);
}
static void
sleep_for(long t)
{
struct timespec req;
const time_t sec = (int)(t/1000);
const long ms = t - (sec * 1000);
req.tv_sec = sec;
req.tv_nsec = ms * 1000000L;
while(-1 == nanosleep(&req, &req));
}
/* ===============================================================
*
* EXAMPLE
*
* ===============================================================*/
/* This are some code examples to provide a small overview of what can be
* done with this library. To try out an example uncomment the include
* and the corresponding function. */
/*#include "../style.c"*/
/*#include "../calculator.c"*/
#include "../overview.c"
#include "../node_editor.c"
/* ===============================================================
*
* DEMO
*
* ===============================================================*/
int
main(void)
{
long dt;
long started;
int running = 1;
int status;
XWindow xw;
struct rawfb_context *rawfb;
void *fb = NULL;
unsigned char tex_scratch[512 * 512];
XSizeHints hints;
/* X11 */
memset(&xw, 0, sizeof xw);
xw.dpy = XOpenDisplay(NULL);
if (!xw.dpy) die("Could not open a display; perhaps $DISPLAY is not set?");
xw.root = DefaultRootWindow(xw.dpy);
xw.screen = XDefaultScreen(xw.dpy);
xw.vis = XDefaultVisual(xw.dpy, xw.screen);
xw.cmap = XCreateColormap(xw.dpy,xw.root,xw.vis,AllocNone);
xw.swa.colormap = xw.cmap;
xw.swa.event_mask =
ExposureMask | KeyPressMask | KeyReleaseMask |
ButtonPress | ButtonReleaseMask| ButtonMotionMask |
Button1MotionMask | Button3MotionMask | Button4MotionMask | Button5MotionMask|
PointerMotionMask | KeymapStateMask | EnterWindowMask | LeaveWindowMask;
xw.win = XCreateWindow(xw.dpy, xw.root, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, 0,
XDefaultDepth(xw.dpy, xw.screen), InputOutput,
xw.vis, CWEventMask | CWColormap, &xw.swa);
XStoreName(xw.dpy, xw.win, "X11");
XMapWindow(xw.dpy, xw.win);
XGetWindowAttributes(xw.dpy, xw.win, &xw.attr);
xw.width = (unsigned int)xw.attr.width;
xw.height = (unsigned int)xw.attr.height;
/* Framebuffer emulator */
status = nk_xlib_init(xw.dpy, xw.vis, xw.screen, xw.win, xw.width, xw.height, &fb);
if (!status || !fb)
return 0;
/* GUI */
rawfb = nk_rawfb_init(fb, tex_scratch, xw.width, xw.height, xw.width * 4);
if (!rawfb)
running = 0;
/* style.c */
/*set_style(ctx, THEME_WHITE);*/
/*set_style(ctx, THEME_RED);*/
/*set_style(ctx, THEME_BLUE);*/
/*set_style(ctx, THEME_DARK);*/
while (running) {
/* Input */
XEvent evt;
started = timestamp();
nk_input_begin(&rawfb->ctx);
while (XCheckWindowEvent(xw.dpy, xw.win, xw.swa.event_mask, &evt)) {
if (XFilterEvent(&evt, xw.win)) continue;
nk_xlib_handle_event(xw.dpy, xw.screen, xw.win, &evt, rawfb);
}
nk_input_end(&rawfb->ctx);
/* GUI */
if (nk_begin(&rawfb->ctx, "Demo", nk_rect(50, 50, 200, 200),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|
NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE)) {
enum {EASY, HARD};
static int op = EASY;
static int property = 20;
nk_layout_row_static(&rawfb->ctx, 30, 80, 1);
if (nk_button_label(&rawfb->ctx, "button"))
fprintf(stdout, "button pressed\n");
nk_layout_row_dynamic(&rawfb->ctx, 30, 2);
if (nk_option_label(&rawfb->ctx, "easy", op == EASY)) op = EASY;
if (nk_option_label(&rawfb->ctx, "hard", op == HARD)) op = HARD;
nk_layout_row_dynamic(&rawfb->ctx, 25, 1);
nk_property_int(&rawfb->ctx, "Compression:", 0, &property, 100, 10, 1);
}
nk_end(&rawfb->ctx);
if (nk_window_is_closed(&rawfb->ctx, "Demo")) break;
/* -------------- EXAMPLES ---------------- */
/*calculator(ctx);*/
overview(&rawfb->ctx);
node_editor(&rawfb->ctx);
/* ----------------------------------------- */
/* Draw framebuffer */
nk_rawfb_render(rawfb, nk_rgb(30,30,30), 1);
/* Emulate framebuffer */
XClearWindow(xw.dpy, xw.win);
nk_xlib_render(xw.win);
XFlush(xw.dpy);
/* Timing */
dt = timestamp() - started;
if (dt < DTIME)
sleep_for(DTIME - dt);
}
nk_rawfb_shutdown(rawfb);
nk_xlib_shutdown();
XUnmapWindow(xw.dpy, xw.win);
XFreeColormap(xw.dpy, xw.cmap);
XDestroyWindow(xw.dpy, xw.win);
XCloseDisplay(xw.dpy);
return 0;
}

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demo/x11_rawfb/nuklear_rawfb.h Normal file
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/*
* MIT License
*
* Copyright (c) 2016-2017 Patrick Rudolph <siro@das-labor.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* ==============================================================
*
* API
*
* ===============================================================
*/
#ifndef NK_RAWFB_H_
#define NK_RAWFB_H_
struct rawfb_context;
/* All functions are thread-safe */
NK_API struct rawfb_context *nk_rawfb_init(void *fb, void *tex_mem, const unsigned int w, const unsigned int h, const unsigned int pitch);
NK_API void nk_rawfb_render(const struct rawfb_context *rawfb, const struct nk_color clear, const unsigned char enable_clear);
NK_API void nk_rawfb_shutdown(struct rawfb_context *rawfb);
NK_API void nk_rawfb_resize_fb(struct rawfb_context *rawfb, void *fb, const unsigned int w, const unsigned int h, const unsigned int pitch);
#endif
/*
* ==============================================================
*
* IMPLEMENTATION
*
* ===============================================================
*/
#ifdef NK_RAWFB_IMPLEMENTATION
struct rawfb_image {
void *pixels;
int w, h, pitch;
enum nk_font_atlas_format format;
};
struct rawfb_context {
struct nk_context ctx;
struct nk_rect scissors;
struct rawfb_image fb;
struct rawfb_image font_tex;
struct nk_font_atlas atlas;
};
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a,b) ((a) < (b) ? (b) : (a))
#endif
static unsigned int
nk_color_from_byte(const nk_byte *c)
{
unsigned int res = 0;
#if defined(RAWFB_RGBX_8888)
res |= (unsigned int)c[0] << 16;
res |= (unsigned int)c[1] << 8;
res |= (unsigned int)c[2] << 0;
#elif defined(RAWFB_XRGB_8888)
res = ((unsigned int *)c)[0];
#else
#error Define one of RAWFB_RGBX_8888 , RAWFB_XRGB_8888
#endif
return (res);
}
static void
nk_rawfb_setpixel(const struct rawfb_context *rawfb,
const short x0, const short y0, const struct nk_color col)
{
unsigned int c = nk_color_from_byte(&col.r);
unsigned int *ptr = (unsigned int *)rawfb->fb.pixels;
ptr += y0 * rawfb->fb.w;
ptr += x0;
if (y0 < rawfb->scissors.h && y0 >= rawfb->scissors.y &&
x0 >= rawfb->scissors.x && x0 < rawfb->scissors.w)
*ptr = c;
}
static void
nk_rawfb_line_horizontal(const struct rawfb_context *rawfb,
const short x0, const short y, const short x1, const struct nk_color col)
{
/* This function is called the most. Try to optimize it a bit...
* It does not check for scissors or image borders.
* The caller has to make sure it does no exceed bounds. */
unsigned int i, n;
unsigned int c[16];
unsigned int *ptr = (unsigned int *)rawfb->fb.pixels;
ptr += y * rawfb->fb.w;
ptr += x0;
n = x1 - x0;
for (i = 0; i < sizeof(c) / sizeof(c[0]); i++)
c[i] = nk_color_from_byte(&col.r);
while (n > 16) {
memcpy((void *)ptr, c, sizeof(c));
n -= 16; ptr += 16;
} for (i = 0; i < n; i++)
ptr[i] = c[i];
}
static void
nk_rawfb_imagesetpixel(const struct rawfb_image *img,
const int x0, const int y0, const struct nk_color col)
{
unsigned char *ptr;
NK_ASSERT(img);
if (y0 < img->h && y0 > 0 && x0 > 0 && x0 < img->w) {
ptr = img->pixels;
if (img->format == NK_FONT_ATLAS_ALPHA8) {
ptr += img->pitch * y0;
ptr[x0] = col.a;
} else {
ptr += img->pitch * y0;
((struct nk_color *)ptr)[x0] = col;
}
}
}
static struct nk_color
nk_image_getpixel(const struct rawfb_image *img, const int x0, const int y0)
{
struct nk_color col = {0, 0, 0, 0};
unsigned char *ptr;
NK_ASSERT(img);
if (y0 < img->h && y0 > 0 && x0 > 0 && x0 < img->w) {
ptr = img->pixels;
if (img->format == NK_FONT_ATLAS_ALPHA8) {
ptr += img->pitch * y0;
col.a = ptr[x0];
col.b = col.g = col.r = 0xff;
} else {
ptr += img->pitch * y0;
col = ((struct nk_color *)ptr)[x0];
}
} return col;
}
static void
nk_image_blendpixel(const struct rawfb_image *img,
const int x0, const int y0, struct nk_color col)
{
struct nk_color col2;
unsigned char inv_a;
if (col.a == 0)
return;
inv_a = 0xff - col.a;
col2 = nk_image_getpixel(img, x0, y0);
col.r = (col.r * col.a + col2.r * inv_a) >> 8;
col.g = (col.g * col.a + col2.g * inv_a) >> 8;
col.b = (col.b * col.a + col2.b * inv_a) >> 8;
nk_rawfb_imagesetpixel(img, x0, y0, col);
}
static void
nk_rawfb_scissor(struct rawfb_context *rawfb,
const float x,
const float y,
const float w,
const float h)
{
rawfb->scissors.x = MIN(MAX(x, 0), rawfb->fb.w);
rawfb->scissors.y = MIN(MAX(y, 0), rawfb->fb.h);
rawfb->scissors.w = MIN(MAX(w + x, 0), rawfb->fb.w);
rawfb->scissors.h = MIN(MAX(h + y, 0), rawfb->fb.h);
}
static void
nk_rawfb_stroke_line(const struct rawfb_context *rawfb,
short x0, short y0, short x1, short y1,
const unsigned int line_thickness, const struct nk_color col)
{
short tmp;
int dy, dx, stepx, stepy;
dy = y1 - y0;
dx = x1 - x0;
/* fast path */
if (dy == 0) {
if (dx == 0 || y0 >= rawfb->scissors.h || y0 < rawfb->scissors.y)
return;
if (dx < 0) {
/* swap x0 and x1 */
tmp = x1;
x1 = x0;
x0 = tmp;
}
x1 = MIN(rawfb->scissors.w - 1, x1);
x0 = MIN(rawfb->scissors.w - 1, x0);
x1 = MAX(rawfb->scissors.x, x1);
x0 = MAX(rawfb->scissors.x, x0);
nk_rawfb_line_horizontal(rawfb, x0, y0, x1, col);
return;
}
if (dy < 0) {
dy = -dy;
stepy = -1;
} else stepy = 1;
if (dx < 0) {
dx = -dx;
stepx = -1;
} else stepx = 1;
dy <<= 1;
dx <<= 1;
nk_rawfb_setpixel(rawfb, x0, y0, col);
if (dx > dy) {
int fraction = dy - (dx >> 1);
while (x0 != x1) {
if (fraction >= 0) {
y0 += stepy;
fraction -= dx;
}
x0 += stepx;
fraction += dy;
nk_rawfb_setpixel(rawfb, x0, y0, col);
}
} else {
int fraction = dx - (dy >> 1);
while (y0 != y1) {
if (fraction >= 0) {
x0 += stepx;
fraction -= dy;
}
y0 += stepy;
fraction += dx;
nk_rawfb_setpixel(rawfb, x0, y0, col);
}
}
}
static void
nk_rawfb_fill_polygon(const struct rawfb_context *rawfb,
const struct nk_vec2i *pnts, int count, const struct nk_color col)
{
int i = 0;
#define MAX_POINTS 64
int left = 10000, top = 10000, bottom = 0, right = 0;
int nodes, nodeX[MAX_POINTS], pixelX, pixelY, j, swap ;
if (count == 0) return;
if (count > MAX_POINTS)
count = MAX_POINTS;
/* Get polygon dimensions */
for (i = 0; i < count; i++) {
if (left > pnts[i].x)
left = pnts[i].x;
if (right < pnts[i].x)
right = pnts[i].x;
if (top > pnts[i].y)
top = pnts[i].y;
if (bottom < pnts[i].y)
bottom = pnts[i].y;
} bottom++; right++;
/* Polygon scanline algorithm released under public-domain by Darel Rex Finley, 2007 */
/* Loop through the rows of the image. */
for (pixelY = top; pixelY < bottom; pixelY ++) {
nodes = 0; /* Build a list of nodes. */
j = count - 1;
for (i = 0; i < count; i++) {
if (((pnts[i].y < pixelY) && (pnts[j].y >= pixelY)) ||
((pnts[j].y < pixelY) && (pnts[i].y >= pixelY))) {
nodeX[nodes++]= (int)((float)pnts[i].x
+ ((float)pixelY - (float)pnts[i].y) / ((float)pnts[j].y - (float)pnts[i].y)
* ((float)pnts[j].x - (float)pnts[i].x));
} j = i;
}
/* Sort the nodes, via a simple “Bubble” sort. */
i = 0;
while (i < nodes - 1) {
if (nodeX[i] > nodeX[i+1]) {
swap = nodeX[i];
nodeX[i] = nodeX[i+1];
nodeX[i+1] = swap;
if (i) i--;
} else i++;
}
/* Fill the pixels between node pairs. */
for (i = 0; i < nodes; i += 2) {
if (nodeX[i+0] >= right) break;
if (nodeX[i+1] > left) {
if (nodeX[i+0] < left) nodeX[i+0] = left ;
if (nodeX[i+1] > right) nodeX[i+1] = right;
for (pixelX = nodeX[i]; pixelX < nodeX[i + 1]; pixelX++)
nk_rawfb_setpixel(rawfb, pixelX, pixelY, col);
}
}
}
#undef MAX_POINTS
}
static void
nk_rawfb_stroke_arc(const struct rawfb_context *rawfb,
short x0, short y0, short w, short h, const short s,
const short line_thickness, const struct nk_color col)
{
/* Bresenham's ellipses - modified to draw one quarter */
const int a2 = (w * w) / 4;
const int b2 = (h * h) / 4;
const int fa2 = 4 * a2, fb2 = 4 * b2;
int x, y, sigma;
if (s != 0 && s != 90 && s != 180 && s != 270) return;
if (w < 1 || h < 1) return;
/* Convert upper left to center */
h = (h + 1) / 2;
w = (w + 1) / 2;
x0 += w; y0 += h;
/* First half */
for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
if (s == 180)
nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
else if (s == 270)
nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
else if (s == 0)
nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
else if (s == 90)
nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
if (sigma >= 0) {
sigma += fa2 * (1 - y);
y--;
} sigma += b2 * ((4 * x) + 6);
}
/* Second half */
for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
if (s == 180)
nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
else if (s == 270)
nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
else if (s == 0)
nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
else if (s == 90)
nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
if (sigma >= 0) {
sigma += fb2 * (1 - x);
x--;
} sigma += a2 * ((4 * y) + 6);
}
}
static void
nk_rawfb_fill_arc(const struct rawfb_context *rawfb, short x0, short y0,
short w, short h, const short s, const struct nk_color col)
{
/* Bresenham's ellipses - modified to fill one quarter */
const int a2 = (w * w) / 4;
const int b2 = (h * h) / 4;
const int fa2 = 4 * a2, fb2 = 4 * b2;
int x, y, sigma;
struct nk_vec2i pnts[3];
if (w < 1 || h < 1) return;
if (s != 0 && s != 90 && s != 180 && s != 270)
return;
/* Convert upper left to center */
h = (h + 1) / 2;
w = (w + 1) / 2;
x0 += w;
y0 += h;
pnts[0].x = x0;
pnts[0].y = y0;
pnts[2].x = x0;
pnts[2].y = y0;
/* First half */
for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
if (s == 180) {
pnts[1].x = x0 + x; pnts[1].y = y0 + y;
} else if (s == 270) {
pnts[1].x = x0 - x; pnts[1].y = y0 + y;
} else if (s == 0) {
pnts[1].x = x0 + x; pnts[1].y = y0 - y;
} else if (s == 90) {
pnts[1].x = x0 - x; pnts[1].y = y0 - y;
}
nk_rawfb_fill_polygon(rawfb, pnts, 3, col);
pnts[2] = pnts[1];
if (sigma >= 0) {
sigma += fa2 * (1 - y);
y--;
} sigma += b2 * ((4 * x) + 6);
}
/* Second half */
for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
if (s == 180) {
pnts[1].x = x0 + x; pnts[1].y = y0 + y;
} else if (s == 270) {
pnts[1].x = x0 - x; pnts[1].y = y0 + y;
} else if (s == 0) {
pnts[1].x = x0 + x; pnts[1].y = y0 - y;
} else if (s == 90) {
pnts[1].x = x0 - x; pnts[1].y = y0 - y;
}
nk_rawfb_fill_polygon(rawfb, pnts, 3, col);
pnts[2] = pnts[1];
if (sigma >= 0) {
sigma += fb2 * (1 - x);
x--;
} sigma += a2 * ((4 * y) + 6);
}
}
static void
nk_rawfb_stroke_rect(const struct rawfb_context *rawfb,
const short x, const short y, const short w, const short h,
const short r, const short line_thickness, const struct nk_color col)
{
if (r == 0) {
nk_rawfb_stroke_line(rawfb, x, y, x + w, y, line_thickness, col);
nk_rawfb_stroke_line(rawfb, x, y + h, x + w, y + h, line_thickness, col);
nk_rawfb_stroke_line(rawfb, x, y, x, y + h, line_thickness, col);
nk_rawfb_stroke_line(rawfb, x + w, y, x + w, y + h, line_thickness, col);
} else {
const short xc = x + r;
const short yc = y + r;
const short wc = (short)(w - 2 * r);
const short hc = (short)(h - 2 * r);
nk_rawfb_stroke_line(rawfb, xc, y, xc + wc, y, line_thickness, col);
nk_rawfb_stroke_line(rawfb, x + w, yc, x + w, yc + hc, line_thickness, col);
nk_rawfb_stroke_line(rawfb, xc, y + h, xc + wc, y + h, line_thickness, col);
nk_rawfb_stroke_line(rawfb, x, yc, x, yc + hc, line_thickness, col);
nk_rawfb_stroke_arc(rawfb, xc + wc - r, y,
(unsigned)r*2, (unsigned)r*2, 0 , line_thickness, col);
nk_rawfb_stroke_arc(rawfb, x, y,
(unsigned)r*2, (unsigned)r*2, 90 , line_thickness, col);
nk_rawfb_stroke_arc(rawfb, x, yc + hc - r,
(unsigned)r*2, (unsigned)r*2, 270 , line_thickness, col);
nk_rawfb_stroke_arc(rawfb, xc + wc - r, yc + hc - r,
(unsigned)r*2, (unsigned)r*2, 180 , line_thickness, col);
}
}
static void
nk_rawfb_fill_rect(const struct rawfb_context *rawfb,
const short x, const short y, const short w, const short h,
const short r, const struct nk_color col)
{
int i;
if (r == 0) {
for (i = 0; i < h; i++)
nk_rawfb_stroke_line(rawfb, x, y + i, x + w, y + i, 1, col);
} else {
const short xc = x + r;
const short yc = y + r;
const short wc = (short)(w - 2 * r);
const short hc = (short)(h - 2 * r);
struct nk_vec2i 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;
nk_rawfb_fill_polygon(rawfb, pnts, 12, col);
nk_rawfb_fill_arc(rawfb, xc + wc - r, y,
(unsigned)r*2, (unsigned)r*2, 0 , col);
nk_rawfb_fill_arc(rawfb, x, y,
(unsigned)r*2, (unsigned)r*2, 90 , col);
nk_rawfb_fill_arc(rawfb, x, yc + hc - r,
(unsigned)r*2, (unsigned)r*2, 270 , col);
nk_rawfb_fill_arc(rawfb, xc + wc - r, yc + hc - r,
(unsigned)r*2, (unsigned)r*2, 180 , col);
}
}
static void
nk_rawfb_fill_triangle(const struct rawfb_context *rawfb,
const short x0, const short y0, const short x1, const short y1,
const short x2, const short y2, const struct nk_color col)
{
struct nk_vec2i pnts[3];
pnts[0].x = x0;
pnts[0].y = y0;
pnts[1].x = x1;
pnts[1].y = y1;
pnts[2].x = x2;
pnts[2].y = y2;
nk_rawfb_fill_polygon(rawfb, pnts, 3, col);
}
static void
nk_rawfb_stroke_triangle(const struct rawfb_context *rawfb,
const short x0, const short y0, const short x1, const short y1,
const short x2, const short y2, const unsigned short line_thickness,
const struct nk_color col)
{
nk_rawfb_stroke_line(rawfb, x0, y0, x1, y1, line_thickness, col);
nk_rawfb_stroke_line(rawfb, x1, y1, x2, y2, line_thickness, col);
nk_rawfb_stroke_line(rawfb, x2, y2, x0, y0, line_thickness, col);
}
static void
nk_rawfb_stroke_polygon(const struct rawfb_context *rawfb,
const struct nk_vec2i *pnts, const int count,
const unsigned short line_thickness, const struct nk_color col)
{
int i;
for (i = 1; i < count; ++i)
nk_rawfb_stroke_line(rawfb, pnts[i-1].x, pnts[i-1].y, pnts[i].x,
pnts[i].y, line_thickness, col);
nk_rawfb_stroke_line(rawfb, pnts[count-1].x, pnts[count-1].y,
pnts[0].x, pnts[0].y, line_thickness, col);
}
static void
nk_rawfb_stroke_polyline(const struct rawfb_context *rawfb,
const struct nk_vec2i *pnts, const int count,
const unsigned short line_thickness, const struct nk_color col)
{
int i;
for (i = 0; i < count-1; ++i)
nk_rawfb_stroke_line(rawfb, pnts[i].x, pnts[i].y,
pnts[i+1].x, pnts[i+1].y, line_thickness, col);
}
static void
nk_rawfb_fill_circle(const struct rawfb_context *rawfb,
short x0, short y0, short w, short h, const struct nk_color col)
{
/* Bresenham's ellipses */
const int a2 = (w * w) / 4;
const int b2 = (h * h) / 4;
const int fa2 = 4 * a2, fb2 = 4 * b2;
int x, y, sigma;
/* Convert upper left to center */
h = (h + 1) / 2;
w = (w + 1) / 2;
x0 += w;
y0 += h;
/* First half */
for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
nk_rawfb_stroke_line(rawfb, x0 - x, y0 + y, x0 + x, y0 + y, 1, col);
nk_rawfb_stroke_line(rawfb, x0 - x, y0 - y, x0 + x, y0 - y, 1, col);
if (sigma >= 0) {
sigma += fa2 * (1 - y);
y--;
} sigma += b2 * ((4 * x) + 6);
}
/* Second half */
for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
nk_rawfb_stroke_line(rawfb, x0 - x, y0 + y, x0 + x, y0 + y, 1, col);
nk_rawfb_stroke_line(rawfb, x0 - x, y0 - y, x0 + x, y0 - y, 1, col);
if (sigma >= 0) {
sigma += fb2 * (1 - x);
x--;
} sigma += a2 * ((4 * y) + 6);
}
}
static void
nk_rawfb_stroke_circle(const struct rawfb_context *rawfb,
short x0, short y0, short w, short h, const short line_thickness,
const struct nk_color col)
{
/* Bresenham's ellipses */
const int a2 = (w * w) / 4;
const int b2 = (h * h) / 4;
const int fa2 = 4 * a2, fb2 = 4 * b2;
int x, y, sigma;
/* Convert upper left to center */
h = (h + 1) / 2;
w = (w + 1) / 2;
x0 += w;
y0 += h;
/* First half */
for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
if (sigma >= 0) {
sigma += fa2 * (1 - y);
y--;
} sigma += b2 * ((4 * x) + 6);
}
/* Second half */
for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
if (sigma >= 0) {
sigma += fb2 * (1 - x);
x--;
} sigma += a2 * ((4 * y) + 6);
}
}
static void
nk_rawfb_stroke_curve(const struct rawfb_context *rawfb,
const struct nk_vec2i p1, const struct nk_vec2i p2,
const struct nk_vec2i p3, const struct nk_vec2i p4,
const unsigned int num_segments, const unsigned short line_thickness,
const struct nk_color col)
{
unsigned int i_step, segments;
float t_step;
struct nk_vec2i last = p1;
segments = MAX(num_segments, 1);
t_step = 1.0f/(float)segments;
for (i_step = 1; i_step <= 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_rawfb_stroke_line(rawfb, last.x, last.y,
(short)x, (short)y, line_thickness,col);
last.x = (short)x; last.y = (short)y;
}
}
static void
nk_rawfb_clear(const struct rawfb_context *rawfb, const struct nk_color col)
{
nk_rawfb_fill_rect(rawfb, 0, 0, rawfb->fb.w, rawfb->fb.h, 0, col);
}
NK_API struct rawfb_context*
nk_rawfb_init(void *fb, void *tex_mem, const unsigned int w, const unsigned int h,
const unsigned int pitch)
{
const void *tex;
struct rawfb_context *rawfb;
rawfb = malloc(sizeof(struct rawfb_context));
if (!rawfb)
return NULL;
nk_memset(rawfb, 0, sizeof(struct rawfb_context));
rawfb->font_tex.pixels = tex_mem;
rawfb->font_tex.format = NK_FONT_ATLAS_ALPHA8;
rawfb->font_tex.w = rawfb->font_tex.h = 0;
rawfb->fb.pixels = fb;
rawfb->fb.w= w;
rawfb->fb.h = h;
#if defined(RAWFB_XRGB_8888) || defined(RAWFB_RGBX_8888)
rawfb->fb.format = NK_FONT_ATLAS_RGBA32;
rawfb->fb.pitch = pitch;
#else
#error Fixme
#endif
nk_init_default(&rawfb->ctx, 0);
nk_font_atlas_init_default(&rawfb->atlas);
nk_font_atlas_begin(&rawfb->atlas);
tex = nk_font_atlas_bake(&rawfb->atlas, &rawfb->font_tex.w, &rawfb->font_tex.h, rawfb->font_tex.format);
if (!tex) return 0;
switch(rawfb->font_tex.format) {
case NK_FONT_ATLAS_ALPHA8:
rawfb->font_tex.pitch = rawfb->font_tex.w * 1;
break;
case NK_FONT_ATLAS_RGBA32:
rawfb->font_tex.pitch = rawfb->font_tex.w * 4;
break;
};
/* Store the font texture in tex scratch memory */
memcpy(rawfb->font_tex.pixels, tex, rawfb->font_tex.pitch * rawfb->font_tex.h);
nk_font_atlas_end(&rawfb->atlas, nk_handle_ptr(NULL), NULL);
if (rawfb->atlas.default_font)
nk_style_set_font(&rawfb->ctx, &rawfb->atlas.default_font->handle);
nk_style_load_all_cursors(&rawfb->ctx, rawfb->atlas.cursors);
nk_rawfb_scissor(rawfb, 0, 0, rawfb->fb.w, rawfb->fb.h);
return rawfb;
}
static void
nk_rawfb_stretch_image(const struct rawfb_image *dst,
const struct rawfb_image *src, const struct nk_rect *dst_rect,
const struct nk_rect *src_rect, const struct nk_rect *dst_scissors)
{
short i, j;
struct nk_color col;
float xinc = src_rect->w / dst_rect->w;
float yinc = src_rect->h / dst_rect->h;
float xoff = src_rect->x, yoff = src_rect->y;
/* Simple nearest filtering rescaling */
/* TODO: use bilinear filter */
for (j = 0; j < (short)dst_rect->h; j++) {
for (i = 0; i < (short)dst_rect->w; i++) {
if (dst_scissors) {
if (i + (int)(dst_rect->x + 0.5f) < dst_scissors->x || i + (int)(dst_rect->x + 0.5f) >= dst_scissors->w)
continue;
if (j + (int)(dst_rect->y + 0.5f) < dst_scissors->y || j + (int)(dst_rect->y + 0.5f) >= dst_scissors->h)
continue;
}
col = nk_image_getpixel(src, (int)xoff, (int) yoff);
nk_image_blendpixel(dst, i + (int)(dst_rect->x + 0.5f), j + (int)(dst_rect->y + 0.5f), col);
xoff += xinc;
}
xoff = src_rect->x;
yoff += yinc;
}
}
static void
nk_rawfb_font_query_font_glyph(nk_handle handle, const float height,
struct nk_user_font_glyph *glyph, const nk_rune codepoint,
const nk_rune next_codepoint)
{
float scale;
const struct nk_font_glyph *g;
struct nk_font *font;
NK_ASSERT(glyph);
NK_UNUSED(next_codepoint);
font = (struct nk_font*)handle.ptr;
NK_ASSERT(font);
NK_ASSERT(font->glyphs);
if (!font || !glyph)
return;
scale = height/font->info.height;
g = nk_font_find_glyph(font, codepoint);
glyph->width = (g->x1 - g->x0) * scale;
glyph->height = (g->y1 - g->y0) * scale;
glyph->offset = nk_vec2(g->x0 * scale, g->y0 * scale);
glyph->xadvance = (g->xadvance * scale);
glyph->uv[0] = nk_vec2(g->u0, g->v0);
glyph->uv[1] = nk_vec2(g->u1, g->v1);
}
NK_API void
nk_rawfb_draw_text(const struct rawfb_context *rawfb,
const struct nk_user_font *font, const struct nk_rect rect,
const char *text, const int len, const float font_height,
const struct nk_color fg)
{
float x = 0;
int text_len = 0;
nk_rune unicode = 0;
nk_rune next = 0;
int glyph_len = 0;
int next_glyph_len = 0;
struct nk_user_font_glyph g;
if (!len || !text) return;
x = 0;
glyph_len = nk_utf_decode(text, &unicode, len);
if (!glyph_len) return;
/* draw every glyph image */
while (text_len < len && glyph_len) {
struct nk_rect src_rect;
struct nk_rect dst_rect;
float char_width = 0;
if (unicode == NK_UTF_INVALID) break;
/* query currently drawn glyph information */
next_glyph_len = nk_utf_decode(text + text_len + glyph_len, &next, (int)len - text_len);
nk_rawfb_font_query_font_glyph(font->userdata, font_height, &g, unicode,
(next == NK_UTF_INVALID) ? '\0' : next);
/* calculate and draw glyph drawing rectangle and image */
char_width = g.xadvance;
src_rect.x = g.uv[0].x * rawfb->font_tex.w;
src_rect.y = g.uv[0].y * rawfb->font_tex.h;
src_rect.w = g.uv[1].x * rawfb->font_tex.w - g.uv[0].x * rawfb->font_tex.w;
src_rect.h = g.uv[1].y * rawfb->font_tex.h - g.uv[0].y * rawfb->font_tex.h;
dst_rect.x = x + g.offset.x + rect.x;
dst_rect.y = g.offset.y + rect.y;
dst_rect.w = ceilf(g.width);
dst_rect.h = ceilf(g.height);
/* TODO: account fg */
/* Use software rescaling to blit glyph from font_text to framebuffer */
nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors);
/* offset next glyph */
text_len += glyph_len;
x += char_width;
glyph_len = next_glyph_len;
unicode = next;
}
}
NK_API void
nk_rawfb_drawimage(const struct rawfb_context *rawfb,
const int x, const int y, const int w, const int h,
const struct nk_image *img, const struct nk_color *col)
{
struct nk_rect src_rect;
struct nk_rect dst_rect;
src_rect.x = img->region[0];
src_rect.y = img->region[1];
src_rect.w = img->region[2];
src_rect.h = img->region[3];
dst_rect.x = x;
dst_rect.y = y;
dst_rect.w = w;
dst_rect.h = h;
nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors);
}
NK_API void
nk_rawfb_shutdown(struct rawfb_context *rawfb)
{
nk_free(&rawfb->ctx);
nk_memset(rawfb, 0, sizeof(struct rawfb_context));
free(rawfb);
}
NK_API void
nk_rawfb_resize_fb(struct rawfb_context *rawfb,
void *fb,
const unsigned int w,
const unsigned int h,
const unsigned int pitch)
{
rawfb->fb.w = w;
rawfb->fb.h = h;
rawfb->fb.pixels = fb;
rawfb->fb.pitch = pitch;
}
NK_API void
nk_rawfb_render(const struct rawfb_context *rawfb,
const struct nk_color clear,
const unsigned char enable_clear)
{
const struct nk_command *cmd;
if (enable_clear)
nk_rawfb_clear(rawfb, clear);
nk_foreach(cmd, (struct nk_context*)&rawfb->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_rawfb_scissor((struct rawfb_context *)rawfb, 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_rawfb_stroke_line(rawfb, 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_rawfb_stroke_rect(rawfb, r->x, r->y, r->w, r->h,
(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_rawfb_fill_rect(rawfb, 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_rawfb_stroke_circle(rawfb, 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_rawfb_fill_circle(rawfb, c->x, c->y, c->w, c->h, c->color);
} break;
case NK_COMMAND_TRIANGLE: {
const struct nk_command_triangle*t = (const struct nk_command_triangle*)cmd;
nk_rawfb_stroke_triangle(rawfb, 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_rawfb_fill_triangle(rawfb, 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_rawfb_stroke_polygon(rawfb, 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_rawfb_fill_polygon(rawfb, 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_rawfb_stroke_polyline(rawfb, 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_rawfb_draw_text(rawfb, t->font, nk_rect(t->x, t->y, t->w, t->h),
t->string, t->length, t->height, t->foreground);
} break;
case NK_COMMAND_CURVE: {
const struct nk_command_curve *q = (const struct nk_command_curve *)cmd;
nk_rawfb_stroke_curve(rawfb, q->begin, q->ctrl[0], q->ctrl[1],
q->end, 22, q->line_thickness, q->color);
} break;
case NK_COMMAND_RECT_MULTI_COLOR:
case NK_COMMAND_IMAGE: {
const struct nk_command_image *q = (const struct nk_command_image *)cmd;
nk_rawfb_drawimage(rawfb, q->x, q->y, q->w, q->h, &q->img, &q->col);
} break;
case NK_COMMAND_ARC: {
assert(0 && "NK_COMMAND_ARC not implemented\n");
} break;
case NK_COMMAND_ARC_FILLED: {
assert(0 && "NK_COMMAND_ARC_FILLED not implemented\n");
} break;
default: break;
}
} nk_clear((struct nk_context*)&rawfb->ctx);
}
#endif

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demo/x11_rawfb/nuklear_xlib.h Normal file
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/*
* Nuklear - v1.17 - public domain
* no warrenty implied; use at your own risk.
* authored from 2015-2016 by Micha Mettke
* Copyright 2016 Patrick Rudolph
*/
/*
* ==============================================================
*
* API
*
* ===============================================================
*/
#ifndef NK_XLIBSHM_H_
#define NK_XLIBSHM_H_
#include <X11/Xlib.h>
NK_API int nk_xlib_init(Display *dpy, Visual *vis, int screen, Window root, unsigned int w, unsigned int h, void **fb);
NK_API int nk_xlib_handle_event(Display *dpy, int screen, Window win, XEvent *evt, struct rawfb_context *rawfb);
NK_API void nk_xlib_render(Drawable screen);
NK_API void nk_xlib_shutdown(void);
#endif
/*
* ==============================================================
*
* IMPLEMENTATION
*
* ===============================================================
*/
#ifdef NK_XLIBSHM_IMPLEMENTATION
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xresource.h>
#include <X11/Xlocale.h>
#include <X11/extensions/XShm.h>
#include <sys/ipc.h>
#include <sys/shm.h>
static struct {
struct nk_context ctx;
struct XSurface *surf;
Cursor cursor;
Display *dpy;
Window root;
XImage *ximg;
XShmSegmentInfo xsi;
char fallback;
GC gc;
} xlib;
NK_API int
nk_xlib_init(Display *dpy, Visual *vis, int screen, Window root,
unsigned int w, unsigned int h, void **fb)
{
unsigned int depth = XDefaultDepth(dpy, screen);
xlib.dpy = dpy;
xlib.root = root;
if (!setlocale(LC_ALL,"")) return 0;
if (!XSupportsLocale()) return 0;
if (!XSetLocaleModifiers("@im=none")) return 0;
/* 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.fallback = False;
do {/* Initialize shared memory according to:
* https://www.x.org/archive/X11R7.5/doc/Xext/mit-shm.html */
int status;
if (!XShmQueryExtension(dpy)) {
printf("No XShm Extension available.\n");
xlib.fallback = True;
break;
}
xlib.ximg = XShmCreateImage(dpy, vis, depth, ZPixmap, NULL, &xlib.xsi, w, h);
if (!xlib.ximg) {
xlib.fallback = True;
break;
}
xlib.xsi.shmid = shmget(IPC_PRIVATE, xlib.ximg->bytes_per_line * xlib.ximg->height, IPC_CREAT | 0777);
if (xlib.xsi.shmid < 0) {
XDestroyImage(xlib.ximg);
xlib.fallback = True;
break;
}
xlib.xsi.shmaddr = xlib.ximg->data = shmat(xlib.xsi.shmid, NULL, 0);
if ((size_t)xlib.xsi.shmaddr < 0) {
XDestroyImage(xlib.ximg);
xlib.fallback = True;
break;
}
xlib.xsi.readOnly = False;
status = XShmAttach(dpy, &xlib.xsi);
if (!status) {
shmdt(xlib.xsi.shmaddr);
XDestroyImage(xlib.ximg);
xlib.fallback = True;
break;
} XSync(dpy, False);
shmctl(xlib.xsi.shmid, IPC_RMID, NULL);
} while(0);
if (xlib.fallback) {
xlib.ximg = XCreateImage(dpy, vis, depth, ZPixmap, 0, NULL, w, h, 32, 0);
if (!xlib.ximg) return 0;
xlib.ximg->data = malloc(h * xlib.ximg->bytes_per_line);
if (!xlib.ximg->data)
return 0;
}
xlib.gc = XDefaultGC(dpy, screen);
*fb = xlib.ximg->data;
return 1;
}
NK_API int
nk_xlib_handle_event(Display *dpy, int screen, Window win, XEvent *evt, struct rawfb_context *rawfb)
{
/* optional grabbing behavior */
if (rawfb->ctx.input.mouse.grab) {
/* XDefineCursor(xlib.dpy, xlib.root, xlib.cursor); */
rawfb->ctx.input.mouse.grab = 0;
} else if (rawfb->ctx.input.mouse.ungrab) {
XWarpPointer(xlib.dpy, None, xlib.root, 0, 0, 0, 0,
(int)rawfb->ctx.input.mouse.prev.x, (int)rawfb->ctx.input.mouse.prev.y);
/* XUndefineCursor(xlib.dpy, xlib.root); */
rawfb->ctx.input.mouse.ungrab = 0;
}
if (evt->type == KeyPress || evt->type == KeyRelease)
{
/* Key handler */
int ret, down = (evt->type == KeyPress);
KeySym *code = XGetKeyboardMapping(xlib.dpy, (KeyCode)evt->xkey.keycode, 1, &ret);
if (*code == XK_Shift_L || *code == XK_Shift_R) nk_input_key(&rawfb->ctx, NK_KEY_SHIFT, down);
else if (*code == XK_Delete) nk_input_key(&rawfb->ctx, NK_KEY_DEL, down);
else if (*code == XK_Return) nk_input_key(&rawfb->ctx, NK_KEY_ENTER, down);
else if (*code == XK_Tab) nk_input_key(&rawfb->ctx, NK_KEY_TAB, down);
else if (*code == XK_Left) nk_input_key(&rawfb->ctx, NK_KEY_LEFT, down);
else if (*code == XK_Right) nk_input_key(&rawfb->ctx, NK_KEY_RIGHT, down);
else if (*code == XK_Up) nk_input_key(&rawfb->ctx, NK_KEY_UP, down);
else if (*code == XK_Down) nk_input_key(&rawfb->ctx, NK_KEY_DOWN, down);
else if (*code == XK_BackSpace) nk_input_key(&rawfb->ctx, NK_KEY_BACKSPACE, down);
else if (*code == XK_Escape) nk_input_key(&rawfb->ctx, NK_KEY_TEXT_RESET_MODE, down);
else if (*code == XK_Page_Up) nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_UP, down);
else if (*code == XK_Page_Down) nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_DOWN, down);
else if (*code == XK_Home) {
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_START, down);
nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_START, down);
} else if (*code == XK_End) {
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_END, down);
nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_END, down);
} else {
if (*code == 'c' && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_COPY, down);
else if (*code == 'v' && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_PASTE, down);
else if (*code == 'x' && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_CUT, down);
else if (*code == 'z' && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_UNDO, down);
else if (*code == 'r' && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_REDO, down);
else if (*code == XK_Left && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_WORD_LEFT, down);
else if (*code == XK_Right && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_WORD_RIGHT, down);
else if (*code == 'b' && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_LINE_START, down);
else if (*code == 'e' && (evt->xkey.state & ControlMask))
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_LINE_END, down);
else {
if (*code == 'i')
nk_input_key(&rawfb->ctx, NK_KEY_TEXT_INSERT_MODE, down);
else if (*code == 'r')
nk_input_key(&rawfb->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(&rawfb->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)
nk_input_button(&rawfb->ctx, NK_BUTTON_LEFT, x, y, down);
if (evt->xbutton.button == Button2)
nk_input_button(&rawfb->ctx, NK_BUTTON_MIDDLE, x, y, down);
else if (evt->xbutton.button == Button3)
nk_input_button(&rawfb->ctx, NK_BUTTON_RIGHT, x, y, down);
else if (evt->xbutton.button == Button4)
nk_input_scroll(&rawfb->ctx, nk_vec2(0, 1.0f));
else if (evt->xbutton.button == Button5)
nk_input_scroll(&rawfb->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(&rawfb->ctx, x, y);
if (rawfb->ctx.input.mouse.grabbed) {
rawfb->ctx.input.mouse.pos.x = rawfb->ctx.input.mouse.prev.x;
rawfb->ctx.input.mouse.pos.y = rawfb->ctx.input.mouse.prev.y;
XWarpPointer(xlib.dpy, None, xlib.root, 0, 0, 0, 0, (int)rawfb->ctx.input.mouse.pos.x, (int)rawfb->ctx.input.mouse.pos.y);
} return 1;
} else if (evt->type == Expose || evt->type == ConfigureNotify) {
/* Window resize handler */
XWindowAttributes attr;
XGetWindowAttributes(dpy, win, &attr);
unsigned int width, height;
void *fb;
width = (unsigned int)attr.width;
height = (unsigned int)attr.height;
nk_xlib_shutdown();
nk_xlib_init(dpy, XDefaultVisual(dpy, screen), screen, win, width, height, &fb);
nk_rawfb_resize_fb(rawfb, fb, width, height, width * 4);
} else if (evt->type == KeymapNotify) {
XRefreshKeyboardMapping(&evt->xmapping);
return 1;
} else if (evt->type == LeaveNotify) {
XUndefineCursor(xlib.dpy, xlib.root);
} else if (evt->type == EnterNotify) {
XDefineCursor(xlib.dpy, xlib.root, xlib.cursor);
} return 0;
}
NK_API void
nk_xlib_shutdown(void)
{
XFreeCursor(xlib.dpy, xlib.cursor);
if (xlib.fallback) {
free(xlib.ximg->data);
XDestroyImage(xlib.ximg);
} else {
XShmDetach(xlib.dpy, &xlib.xsi);
XDestroyImage(xlib.ximg);
shmdt(xlib.xsi.shmaddr);
shmctl(xlib.xsi.shmid, IPC_RMID, NULL);
} nk_memset(&xlib, 0, sizeof(xlib));
}
NK_API void
nk_xlib_render(Drawable screen)
{
if (xlib.fallback)
XPutImage(xlib.dpy, screen, xlib.gc, xlib.ximg,
0, 0, 0, 0, xlib.ximg->width, xlib.ximg->height);
else XShmPutImage(xlib.dpy, screen, xlib.gc, xlib.ximg,
0, 0, 0, 0, xlib.ximg->width, xlib.ximg->height, False);
}
#endif

2
nuklear.h
View File

@ -2468,7 +2468,7 @@ typedef void(*nk_query_font_glyph_f)(nk_handle handle, float font_height,
struct nk_user_font_glyph *glyph,
nk_rune codepoint, nk_rune next_codepoint);
#ifdef NK_INCLUDE_VERTEX_BUFFER_OUTPUT
#if defined(NK_INCLUDE_VERTEX_BUFFER_OUTPUT) || defined(NK_INCLUDE_SOFTWARE_FONT)
struct nk_user_font_glyph {
struct nk_vec2 uv[2];
/* texture coordinates */