X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fglwrap.c;h=cd1c328139e784f2a4bea80d90297e86401d4402;hb=a832996c884a0e0acc9a38ba4dd258edb75ec7af;hp=10bfc77fcb12cd56f21149444593f8df57de8d52;hpb=fab9ed5163a8f4ef5314bc67e48d1690d1126649;p=gldbg.git

diff --git a/source/glwrap.c b/source/glwrap.c
index 10bfc77..cd1c328 100644
--- a/source/glwrap.c
+++ b/source/glwrap.c
@@ -1,16 +1,22 @@
-/* $Id$
-
-This file is part of gldbg
-Copyright © 2009-2010  Mikko Rasa, Mikkosoft Productions
-Distributed under the GPL
-*/
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>
 #include <dlfcn.h>
 #include <fcntl.h>
+#include <signal.h>
+#include "arraysize.h"
+#include "breakpoint.h"
+#include "functions.h"
+#include "opengl.h"
+#include "packet.h"
+
+#define UNUSED __attribute__((unused))
+
+static unsigned char breakpoints[N_FUNCS] = { };
+static char break_any = 0;
+static char hold = 0;
+static char no_break = 0;
 
 static const char *get_lib_names(void)
 {
@@ -102,3 +108,128 @@ int get_out_fd(void)
 
 	return fd;
 }
+
+int get_in_fd(void)
+{
+	static int fd = -1;
+
+	if(fd<0)
+	{
+		const char *var = getenv("GLWRAP_CTRL_FD");
+		if(var)
+			fd = strtol(var, NULL, 0);
+		else
+			fd = 0;
+	}
+
+	return fd;
+}
+
+static void receive_gldBreak(GlPacket *pkt)
+{
+	unsigned short func;
+	unsigned char flags_set;
+	unsigned char flags_clr;
+
+	packet_read_short(pkt, (short *)&func);
+	packet_read_char(pkt, (char *)&flags_set);
+	packet_read_char(pkt, (char *)&flags_clr);
+
+	if(func)
+	{
+		breakpoints[func] &= ~flags_clr;
+		breakpoints[func] |= flags_set;
+	}
+	else
+		break_any = flags_set;
+}
+
+static void receive_gldHold(GlPacket *pkt UNUSED)
+{
+	hold = 1;
+}
+
+static void receive_gldQueryViewport(GlPacket *pkt UNUSED)
+{
+	int viewport[4];
+
+	no_break = 1;
+	glGetIntegerv(GL_VIEWPORT, viewport);
+	no_break = 0;
+}
+
+static void receive_gldReadPixels(GlPacket *pkt)
+{
+	GLint x, y;
+	GLsizei width, height;
+	GLenum format, type;
+	char *data;
+
+	packet_read_int(pkt, &x);
+	packet_read_int(pkt, &y);
+	packet_read_int(pkt, &width);
+	packet_read_int(pkt, &height);
+	packet_read_int(pkt, (int *)&format);
+	packet_read_int(pkt, (int *)&type);
+
+	data = (char *)malloc(width*height*typesize(type)*formatsize(format));
+	no_break = 1;
+	glReadPixels(x, y, width, height, format, type, data);
+	no_break = 0;
+	free(data);
+}
+
+static void receive(void)
+{
+	GlPacket *pkt;
+
+	while((pkt = packet_receive(get_in_fd())))
+	{
+		unsigned short func;
+
+		packet_read_short(pkt, (short *)&func);
+		switch(func)
+		{
+		case FUNC_GLDBREAK: receive_gldBreak(pkt); break;
+		case FUNC_GLDHOLD: receive_gldHold(pkt); break;
+		case FUNC_GLDQUERYVIEWPORT: receive_gldQueryViewport(pkt); break;
+		case FUNC_GLDREADPIXELS: receive_gldReadPixels(pkt); break;
+		default:;
+		}
+	}
+}
+
+void tracepoint(unsigned short func, int flag)
+{
+	int breakpoint;
+
+	if(no_break)
+		return;
+
+	receive();
+
+	breakpoint = (breakpoints[func]|break_any)&flag;
+	if(breakpoint || hold)
+	{
+		GlPacket *pkt;
+
+		if(breakpoint)
+		{
+			pkt = packet_begin(FUNC_GLDBREAK);
+			packet_write_short(pkt, func);
+			packet_write_char(pkt, flag);
+			packet_send(pkt, get_out_fd());
+		}
+
+		break_any = 0;
+
+		while(1)
+		{
+			hold = 0;
+			raise(SIGTRAP);
+			receive();
+			if(!hold)
+				break;
+		}
+	}
+}