ggiglut.c

mesa-6.5-minigui源码

/* **************************************************************************
 * ggiglut.c
 * **************************************************************************
 * 
 * Copyright (C) 1998 Uwe Maurer - [e-mail] 
 * Copyright (C) 1999 James Simmons
 * Copyright (C) 1999 Jon Taylor
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * 
 * **************************************************************************
 * To-do:
 * - Make everything use the portable ggi_* types
 * 
 */

#define BUILDING_GGIGLUT

#define WIDTH	640
#define HEIGHT	480
#define GRAPHTYPE_RGB	GT_16BIT
#define GRAPHTYPE_INDEX	GT_8BIT

/*************************************************************************/

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "GL/ggimesa.h"
#include "debug.h"

#include <ggi/ggi.h>
#include <ggi/gii.h>

int _ggiglutDebugSync = 0;
uint32 _ggiglutDebugState = 0;

char *__glutProgramName = "GGI";

static ggi_visual_t __glut_vis;

static ggi_mesa_context_t __glut_ctx;

//static int __glut_width = WIDTH;
//static int __glut_height = HEIGHT;
//static ggi_graphtype __glut_gt_rgb = GRAPHTYPE_RGB;
//static ggi_graphtype __glut_gt_index = GRAPHTYPE_INDEX;
static int __glut_width = GGI_AUTO;
static int __glut_height = GGI_AUTO;
static ggi_graphtype __glut_gt_rgb = GT_AUTO;
static ggi_graphtype __glut_gt_index = GT_8BIT;
static int __glut_init = GL_FALSE;

static int mousex = WIDTH / 2;
static int mousey = HEIGHT / 2;
static int mouse_moved = GL_FALSE;
static int mouse_down = GL_FALSE;
static int mouse_showcursor = GL_FALSE;

static void (*__glut_reshape)(int, int);
static void (*__glut_display)(void);
static void (*__glut_idle)(void);
static void (*__glut_keyboard)(unsigned char, int, int);
static void (*__glut_special)(int, int, int);
static void (*__glut_mouse)(int, int, int, int);
static void (*__glut_motion)(int, int);
static void (*__glut_passive_motion)(int, int);
static void (*__glut_visibility)(int);

static unsigned int __glut_mode = GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH;

static int __glut_mod_keys = 0;

static int __glut_redisplay = GL_FALSE;

/* Menu */
static int __glut_menubutton = -1;
static int __glut_menuactive = GL_FALSE;

#define MAX_ENTRIES	64

typedef struct menu_s
{
	char *label[MAX_ENTRIES];
	int value[MAX_ENTRIES];
	struct menu_s * submenu[MAX_ENTRIES];
	void (*func)(int);		
	int max_strlen;
	int num_entries;
} menu_t;

static menu_t *mainmenu;
static menu_t *curmenu;
static menu_t *activemenu;

void glutInit(int *argc, char **argv)
{
	ggi_graphtype gt;
	int i, k;
	char *str;
	
	GGIGLUTDPRINT_CORE("glutInit() called\n");

	#define REMOVE  {for (k=i;k<*argc-1;k++) argv[k]=argv[k+1];  \
				(*argc)--; i--; }

	if (__glut_init) return;
	
        str = getenv("GGIGLUT_DEBUG");
	if (str != NULL) {
		_ggiglutDebugState = atoi(str);
		fprintf(stderr, "Debugging=%d\n", _ggiglutDebugState);
		GGIGLUTDPRINT_CORE("Debugging=%d\n", _ggiglutDebugState);
	}
	
	str = getenv("GGIGLUT_DEBUGSYNC");
	if (str != NULL) {
		_ggiglutDebugSync = 1;
	}

	if (argc && argv)
	{

		for (i = 1; i < *argc; i++)
		{
			if (strcmp(argv[i], "-mouse") == 0)
			{
				mouse_showcursor = GL_TRUE;	
				REMOVE;
			}
			else
			if (strcmp(argv[i], "-bpp") == 0 && (i + 1) < (*argc))
			{
				switch(atoi(argv[i + 1]))
				{
					case 4: gt = GT_4BIT; break;
					case 8: gt = GT_8BIT; break;
					case 15: gt = GT_15BIT; break;
					case 16: gt = GT_16BIT; break;
					case 24: gt = GT_24BIT; break;
					case 32: gt = GT_32BIT; break;
					default:
					ggiPanic("\"%s\" bits per pixel?\n", argv[i+1]);
				}
				__glut_gt_rgb = __glut_gt_index = gt;
				REMOVE;
				REMOVE;
			} 
			else
			if (strcmp(argv[i], "-size") == 0 && (i + 2) < (*argc))
			{
				__glut_width = atoi(argv[i + 1]);
				__glut_height = atoi(argv[i + 2]);
				REMOVE;
				REMOVE;
				REMOVE;
			}
		}
	}
	
	if (ggiInit() < 0)
	{
		ggiPanic("ggiInit() failed!\n");
	}
	__glut_init = GL_TRUE;

#undef REMOVE
}

void glutInitWindowPosition(int x, int y)
{
	GGIGLUTDPRINT_CORE("glutInitWindowPosition() called\n");
}

void glutInitWindowSize(int x, int y)
{
	GGIGLUTDPRINT_CORE("glutInitWindowsSize() called\n");
}

void glutFullScreen(void)
{
	GGIGLUTDPRINT_CORE("glutFullScreen() called\n");
}

void glutInitDisplayMode(unsigned int mode)
{
	GGIGLUTDPRINT_CORE("glutInitDisplayMode() called\n");
	
	__glut_mode = mode;
}

void glutInitDisplayString(const char *string)
{
	GGIGLUTDPRINT_CORE("glutInitDisplayString(%s) called\n", string);
}

int glutCreateWindow(const char *title)
{
	ggi_graphtype gt;
	ggi_mode mode = 
	{
		1,
		{ GGI_AUTO, GGI_AUTO },
		{ GGI_AUTO, GGI_AUTO },
		{ 0, 0 },
		GT_AUTO,
		{ GGI_AUTO, GGI_AUTO }
	};
	int frames;
	int rgb;
	int err;

	GGIGLUTDPRINT_CORE("glutCreateWindow() called\n");
	
	if (!__glut_init) 
	  glutInit(NULL, NULL);

	GGIGLUTDPRINT("GGIGLUT: %s\n", title);

	rgb = !(__glut_mode & GLUT_INDEX);
	frames = (__glut_mode & GLUT_DOUBLE) ? 2 : 1;
	
	gt = (rgb) ? __glut_gt_rgb : __glut_gt_index;
	
	__glut_vis = ggiOpen(NULL);
	if (__glut_vis == NULL) 
	{
	  ggiPanic("ggiOpen() failed!\n");
	  /* return GL_FALSE; */
	}
	
	ggiSetFlags(__glut_vis, GGIFLAG_ASYNC);
	
	ggiCheckMode(__glut_vis, &mode);
	
	err = ggiSetMode(__glut_vis, &mode);
	if (err < 0) 
	{
	  ggiPanic("Can't set graphic mode!\n");
	  /* return GL_FALSE; */
	}
	
	if (ggiMesaExtendVisual(__glut_vis, GL_FALSE, GL_FALSE, 
	                        16, 0, 0, 0, 0, 0, 1) < 0) 
	{
		ggiPanic("GGIMesaSetVisual failed!\n");
	}
	
	__glut_ctx = ggiMesaCreateContext(__glut_vis);
	
	if (__glut_ctx == NULL) 
	  ggiPanic("Can't create mesa-context\n");

	ggiGetMode(__glut_vis, &mode);

	
	__glut_width = mode.visible.x;
	__glut_height = mode.visible.y;
	
	mousex = mode.visible.x / 2;
	mousey = mode.visible.y / 2;
	
	ggiMesaMakeCurrent(__glut_ctx, __glut_vis);
	
	if (__glut_reshape) 
	  __glut_reshape(__glut_width, __glut_height);
	
	return GL_TRUE;
}

void glutReshapeFunc(void (*func)(int, int))
{
	GGIGLUTDPRINT_CORE("glutReshapeFunc() called\n");
	
	__glut_reshape = func;
	if (__glut_vis && __glut_reshape) 
	  __glut_reshape(__glut_width, __glut_height);
}

void glutKeyboardFunc(void (*keyboard)(unsigned char key, int x, int y))
{
	GGIGLUTDPRINT_CORE("glutKeyBoardFunc() called\n");

	__glut_keyboard = keyboard;
}

int glutGetModifiers(void)
{
	GGIGLUTDPRINT_CORE("glutGetModifiers() called\n");

	return __glut_mod_keys;
}

void glutEntryFunc(void (*func)(int state))
{
	GGIGLUTDPRINT_CORE("glutEntryFunc() called\n");
}

void glutVisibilitFunc(void (*func)(int state))
{
	GGIGLUTDPRINT_CORE("glutVisibilityFunc() called\n");
}

void glutTimerFunc(unsigned int millis, void (*func)(int value), int value)
{
	GGIGLUTDPRINT_CORE("glutTimerFunc() called\n");
}

void glutMenuStateFunc(void (*func)(int state))
{
	GGIGLUTDPRINT_CORE("glutMenuStateFunc() called\n");
}

int glutGet(GLenum type)
{
	GGIGLUTDPRINT_CORE("glutGet() called\n");
	
	switch(type)
	{
		case GLUT_WINDOW_X:	
		return 0;
		case GLUT_WINDOW_Y:
		return 0;
		case GLUT_WINDOW_WIDTH:
		return __glut_width;
		case GLUT_WINDOW_HEIGHT:
		return __glut_height;
		case GLUT_MENU_NUM_ITEMS:
		if (curmenu) 
		  return curmenu->num_entries;
		else 
		  return 0;
		default:
		GGIGLUTDPRINT("glutGet: unknown type %i\n", type);
	}
	return 0;
}

void glutSpecialFunc(void (*special)(int key, int x, int y))
{
	GGIGLUTDPRINT_CORE("glutSpecialFunc() called\n");
	
	__glut_special=special;
}

void glutDisplayFunc(void (*disp)(void))
{
	GGIGLUTDPRINT_CORE("glutDisplayFunc() called\n");
	__glut_display=disp;
}

void glutSetColor(int index, GLfloat red, GLfloat green, GLfloat blue)
{
	ggi_color c;
	GLfloat max;
  
	GGIGLUTDPRINT_CORE("glutSetColor() called\n");
	
	if (red > 1.0) red = 1.0;
	if (red < 0.0) red = 0.0;
	if (green > 1.0) green = 1.0;
	if (green < 0.0) green = 0.0;
	if (blue > 1.0) blue = 1.0;
	if (blue < 0.0) blue = 0.0;
  
	max = (float)((1 << GGI_COLOR_PRECISION) - 1);
	
	c.r = (int)(max * red);
	c.g = (int)(max * green);
	c.b = (int)(max * blue);
	ggiSetPalette(__glut_vis, index, 1, &c);
}

void glutPostRedisplay(void)
{
	GGIGLUTDPRINT_CORE("glutPostRedisplay() called\n");

	__glut_redisplay = GL_TRUE;
}

void glutPostWindowRedisplay(int win)
{
	GGIGLUTDPRINT_CORE("glutPostWindowRedisplay() called\n");
	
	__glut_redisplay = GL_TRUE;
}

void glutSwapBuffers(void)
{
	GGIGLUTDPRINT_CORE("glutSwapBuffers() called\n");

	ggiMesaSwapBuffers();
}

void glutIdleFunc(void (*idle)(void))
{
	GGIGLUTDPRINT_CORE("glutIdleFunc() called\n");
	
	__glut_idle = idle;
}

static void keyboard(ggi_event *ev)
{
	int sym;
	int modifer = 0, key = 0;
  
	GGIGLUTDPRINT_CORE("keyboard() called\n");
	
	sym = ev->key.sym;
  
	modifer = ev->key.modifiers;
	if (modifer == GII_KM_SHIFT)
	  __glut_mod_keys |= GLUT_ACTIVE_SHIFT;
	if (modifer == GII_KM_CTRL)
	  __glut_mod_keys |= GLUT_ACTIVE_CTRL;
	if (modifer == GII_KM_ALT)
	  __glut_mod_keys |= GLUT_ACTIVE_ALT;

	/* if (__glut_special && key) __glut_special(GII_KTYP(key),0,0); */
  
	if (__glut_keyboard) 
//	  __glut_keyboard(GII_UNICODE(sym), 0, 0);
	  __glut_keyboard(sym, 0, 0);
}

static void mouseabs(ggi_event *ev)
{
	int oldx = mousex;
	int oldy = mousey;
  
	mousex = ev->pmove.x;
	mousey = ev->pmove.y;
  
	if (mousex < 0) mousex = 0;
	if (mousey < 0) mousey = 0;
	if (mousex >= __glut_width) mousex = __glut_width - 1;
	if (mousey >= __glut_height) mousey = __glut_height - 1;
	
	if (mousex != oldx || mousey != oldy) mouse_moved = GL_TRUE;
}

static void mouse(ggi_event *ev)
{
	int oldx = mousex;
	int oldy = mousey;
  
	GGIGLUTDPRINT_CORE("mouse() called\n");
	
	mousex += ev->pmove.x >> 1;
	mousey += ev->pmove.y >> 1;
	
	if (mousex < 0) mousex = 0;
	if (mousey < 0) mousey = 0;
	if (mousex >= __glut_width) mousex = __glut_width - 1;
	if (mousey >= __glut_height) mousey = __glut_height - 1;
	
	if (mousex != oldx || mousey != oldy) mouse_moved = GL_TRUE;
  
}

static void showmenu(void);
static int clickmenu(void);
static void updatemouse(void);
static void drawmouse(void);