Mon 14 Oct 23:14:00 CEST 2024

library/nwindow.c

@@ -0,0 +1,180 @@
+
+#include "kernel/gfxstream.h"
+#include "kernel/types.h"
+#include "kernel/events.h"
+#include "library/nwindow.h"
+#include "library/syscalls.h"
+
+#include "library/string.h"
+#include "library/malloc.h"
+#include "library/stdio.h"
+
+struct nwindow {
+	int fd;
+	int x, y;
+	int width, height;
+	struct {
+		int *buffer;
+		int length;
+		int index;
+	} graphics;
+};
+
+struct nwindow * nw_create_fd( int fd )
+{
+	struct nwindow *w = malloc(sizeof(*w));
+	w->fd = fd;
+	w->x = 0;
+	w->y = 0;
+	w->graphics.buffer = malloc(PAGE_SIZE);
+	w->graphics.length = PAGE_SIZE;
+	w->graphics.index = 0;
+
+	int dims[2];
+	syscall_object_size(fd,dims,2);
+	w->width = dims[0];
+	w->height = dims[1];
+
+	return w;
+}
+
+struct nwindow * nw_create_default()
+{
+	return nw_create_fd(KNO_STDWIN);
+}
+
+struct nwindow * nw_create_child( struct nwindow *parent, int x, int y, int width, int height )
+{
+	int fd = syscall_open_window(parent->fd,x,y,width,height);
+	struct nwindow *nw = nw_create_fd(fd);
+	nw->x = x;
+	nw->y = y;
+	nw->width = width;
+	nw->height = height;
+	return nw;
+}
+
+int nw_width( struct nwindow *nw )
+{
+	return nw->width;
+}
+
+int nw_height( struct nwindow *nw )
+{
+	return nw->height;
+}
+
+int nw_next_event( struct nwindow *nw, struct event *e )
+{
+	int r = syscall_object_read(nw->fd,e,sizeof(*e),0);
+	return r>0;
+}
+
+int nw_read_events( struct nwindow *nw, struct event *e, int count, int blocking )
+{
+	int r = syscall_object_read(nw->fd,e,sizeof(*e)*count,blocking==0 ? KERNEL_IO_NONBLOCK : 0);
+	return r>0 ? r : 0;
+}
+
+int nw_post_events( struct nwindow *nw, const struct event *e, int count )
+{
+	return syscall_object_write(nw->fd,e,sizeof(*e)*count,KERNEL_IO_POST);
+}
+
+
+char nw_getchar( struct nwindow *nw, int blocking )
+{
+	struct event e;
+	while(1) {
+		int r = nw_read_events(nw,&e,sizeof(e),blocking);
+		if(r<=0) return 0;
+		if(e.type==EVENT_KEY_DOWN) {
+			return e.code;
+       		}
+	}
+}
+
+int nw_fd( struct nwindow *w )
+{
+	return w->fd;
+}
+
+static void nw_draw3( struct nwindow *nw, int t, int a0, int a1, int a2 )
+{
+	if(nw->graphics.length-nw->graphics.index<4) {
+		nw_flush(nw);
+	}
+	int *p = &nw->graphics.buffer[nw->graphics.index];
+	*p++ = t;
+	*p++ = a0;
+	*p++ = a1;
+	*p++ = a2;
+	nw->graphics.index += 4;
+}
+
+static void nw_draw4( struct nwindow *nw, int t, int a0, int a1, int a2, int a3 )
+{
+	if(nw->graphics.length-nw->graphics.index<5) {
+		nw_flush(nw);
+	}
+	int *p = &nw->graphics.buffer[nw->graphics.index];
+	*p++ = t;
+	*p++ = a0;
+	*p++ = a1;
+	*p++ = a2;
+	*p++ = a3;
+	nw->graphics.index += 5;
+}
+
+void nw_flush( struct nwindow *nw )
+{
+	syscall_object_write(nw->fd, nw->graphics.buffer, nw->graphics.index, 0);
+	nw->graphics.index = 0;
+}
+
+void nw_fgcolor( struct nwindow *nw, int r, int g, int b)
+{
+	nw_draw3(nw,GRAPHICS_FGCOLOR, r, g, b);
+}
+
+void nw_bgcolor( struct nwindow *nw, int r, int g, int b)
+{
+	nw_draw3(nw,GRAPHICS_BGCOLOR, r, g, b);
+}
+
+void nw_rect( struct nwindow *nw, int x, int y, int w, int h)
+{
+	nw_draw4(nw,GRAPHICS_RECT, x, y, w, h);
+}
+
+void nw_clear( struct nwindow *nw, int x, int y, int w, int h)
+{
+	nw_draw4(nw,GRAPHICS_CLEAR, x, y, w, h);
+}
+
+void nw_line( struct nwindow *nw, int x, int y, int w, int h)
+{
+	nw_draw4(nw,GRAPHICS_LINE, x, y, w, h);
+}
+
+void nw_string( struct nwindow *nw, int x, int y, const char *s )
+{
+	int length = strlen(s);
+
+	if(nw->graphics.length-nw->graphics.index < (length+4) ) {
+		nw_flush(nw);
+	}
+
+	int *p = &nw->graphics.buffer[nw->graphics.index];
+	*p++ = GRAPHICS_TEXT;
+	*p++ = x;
+	*p++ = y;
+	*p++ = length;
+
+	int i;
+	for(i=0;i<length;i++) {
+		*p++ = s[i];
+	}
+
+	nw->graphics.index += 4 + length;
+}