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/*
$Id: opengl.c,v 1.1 2006-03-15 04:54:54 matju Exp $
GridFlow
Copyright (c) 2001,2002,2003,2004,2005 by Mathieu Bouchard
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
See file ../COPYING for further informations on licensing terms.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "../base/grid.h.fcs"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <signal.h>
#ifdef MACOSX
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#else
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#endif
#include <setjmp.h>
static bool in_use = false;
\class FormatOpenGL < Format
struct FormatOpenGL : Format {
int window;
GLuint gltex;
P<BitPacking> bit_packing;
P<Dim> dim;
Pt<uint8> buf;
\decl void call ();
\decl void initialize (Symbol mode);
\decl void close ();
\decl void resize_window (int sx, int sy);
\grin 0
};
static jmp_buf hack;
static void my_idle () { longjmp(hack,1); }
\def void call () {
int32 sy = dim->get(0);
int32 sx = dim->get(1);
glEnable(GL_TEXTURE_2D);
if (!gltex) {
}
glTexSubImage2D(GL_TEXTURE_2D,0,0,0,sx,sy,GL_RGBA,GL_UNSIGNED_BYTE,buf);
glBindTexture(GL_TEXTURE_2D, gltex);
glBegin(GL_QUADS);
glColor3f(1.f,1.f,1.f);
glTexCoord2f(0.f,0.f); glVertex2f(0.f,0.f);
glTexCoord2f(1.f,0.f); glVertex2f( sx,0.f);
glTexCoord2f(1.f,1.f); glVertex2f( sx, sy);
glTexCoord2f(0.f,1.f); glVertex2f(0.f, sy);
glEnd();
//Here comes some (un)fair amount of arm-twisting
//This is for processing queued events and then "returning".
glutIdleFunc(my_idle);
if(!setjmp(hack)) glutMainLoop();
//done
IEVAL(rself,"@clock.delay 100");
}
\def void resize_window (int sx, int sy) {L
dim = new Dim(sy,sx,3);
char foo[666];
sprintf(foo,"GridFlow/GL (%d,%d,3)",sy,sx);
if ((unsigned)window==0xDeadBeef) {
glutInitWindowSize(sx,sy);
window = glutCreateWindow(foo);
} else {
glutReshapeWindow(sx,sy);
}
if (buf) delete buf.p;
buf = ARRAY_NEW(uint8,sy*sx*4);
glViewport(0,0,sx,sy);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0,sx,sy,0,-99999,99999);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
if (gltex) glDeleteTextures(1, (GLuint*)&gltex);
glGenTextures(1, (GLuint*)&gltex);
glBindTexture(GL_TEXTURE_2D,gltex);
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
glTexImage2D(GL_TEXTURE_2D,0,GL_RGBA,sx,sy,0,GL_RGBA,GL_UNSIGNED_BYTE,NULL);
}
GRID_INLET(FormatOpenGL,0) {
if (in->dim->n != 3)
RAISE("expecting 3 dimensions: rows,columns,channels");
if (in->dim->get(2) != 3)
RAISE("expecting 3 channels: red,green,blue (got %d)",in->dim->get(2));
int sxc = in->dim->prod(1);
int sx = in->dim->get(1), osx = dim->get(1);
int sy = in->dim->get(0), osy = dim->get(0);
in->set_factor(sxc);
if (sx!=osx || sy!=osy) resize_window(0,0,sx,sy);
} GRID_FLOW {
int sxc = in->dim->prod(1);
int sx = in->dim->get(1);
int bypl = 4*sx;
int y = in->dex / sxc;
assert((in->dex % sxc) == 0);
assert((n % sxc) == 0);
for (; n>0; y++, data+=sxc, n-=sxc) bit_packing->pack(sx, data, buf+y*bypl);
} GRID_FINISH {
} GRID_END
\def void close () {
IEVAL(rself,"@clock.unset");
if (gltex) glDeleteTextures(1, (GLuint*)&gltex);
if (buf) delete buf.p;
in_use=false;
if ((unsigned)window!=0xDeadBeef) {
glutDestroyWindow(window);
window=0xDeadBeef;
}
}
\def void initialize (Symbol mode) {
rb_call_super(argc,argv);
if (in_use) RAISE("only one #io:opengl object at a time; sorry");
in_use=true;
if (mode!=SYM(out)) RAISE("write-only, sorry");
gltex = 0;
glEnable(GL_TEXTURE_2D);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_ALPHA_TEST);
glDisable(GL_CULL_FACE);
glDisable(GL_DITHER);
glDisable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
window = 0xDeadBeef;
int dummy = 0;
glutInit(&dummy,0);
glutInitDisplayMode(GLUT_RGBA);
resize_window(0,0,320,240);
uint32 mask[3] = {0xff000000,0x00ff0000,0x0000ff00};
bit_packing = new BitPacking(4,4,3,mask);
IEVAL(rself,"@clock = Clock.new self; @clock.delay 0");
gfpost("@clock = Clock.new self");
}
\classinfo {
IEVAL(rself,"install '#io:opengl',1,1;@comment='Silicon Graphics OpenGL'");
}
\end class FormatOpenGL
void startup_opengl () {
\startall
}
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