static void cdkillcanvas(cdCtxCanvas *ctxcanvas)
{
if(ctxcanvas->font)
ftglDestroyFont(ctxcanvas->font);
if (ctxcanvas->glLastConvertUTF8)
free(ctxcanvas->glLastConvertUTF8);
free(ctxcanvas);
}
static void cdkillcanvas(cdCtxCanvas *ctxcanvas)
{
if(ctxcanvas->font)
ftglDestroyFont(ctxcanvas->font);
if (ctxcanvas->utf8_buffer)
free(ctxcanvas->utf8_buffer);
free(ctxcanvas);
}
static int font_gc(lua_State *L) {
font_t *font = to_font(L, 1);
ftglDestroyFont(font->font);
fprintf(stderr, INFO("gc'ing font\n"));
return 0;
}
int main(int argc, char *argv[])
{
char *shader = "mandelbrot (copy).frag";
if (argc > 1)
{
shader = argv[1];
}
glfwInit();
/*int major, minor, rev;
glfwGetGLVersion(&major, &minor, &rev);
printf("using openGL %d.%d.%d\n", major, minor, rev);*/
GLFWvidmode mode;
glfwGetDesktopMode( &mode );
window_width = mode.Width;
window_height = mode.Height;
printf("%dx%d\n", window_width, window_height);
//glfwOpenWindow(window_width, window_height, 5, 6, 5, 0, 8, 0, GLFW_FULLSCREEN);
glfwOpenWindow(mode.Width, mode.Height, mode.RedBits, mode.GreenBits, mode.BlueBits, 0, 0, 0, GLFW_FULLSCREEN);
// setup opengl perspective stuff.
glMatrixMode(GL_PROJECTION);
float aspect_ratio = ((float)window_height) / window_width;
glFrustum(.5, -.5, -.5 * aspect_ratio, .5 * aspect_ratio, 1, 50);
glDisable( GL_DEPTH_TEST );
glTranslatef(0.0, 0.0, -1.00);
glClearColor(0.0, 1.0, 1.0, 0.0);
// will create and set shader program.
GLhandleARB program = SetupFragmentShader(shader);
// get the location of all the uniforms
prepareUniforms(program);
// must call use program before setting uniforms values
glUseProgram(program);
uint param_i = 0;
parameters[WIDTH] = createParameter1i(program, "wW", window_width );
parameters[HEIGHT] = createParameter1i(program, "wH", window_height );
parameters[TIME] = createParameter1f(program, "time", 0.0 );
parameters[MINX] = createParameter1f(program, "minx", -2.0);
parameters[MINY] = createParameter1f(program, "miny", 1.0);
parameters[DELTA] = createParameter1f(program, "deltax", 3.0);
parameters[THETA] = createParameter1f(program, "theta", 1.0);
//synchParameters ( parameters );
/*for ( param_i = 0; param_i < NPARAMS; param_i++ )
{
Parameter *param = ¶meters[param_i];
switch ( param->utype )
{
case INT:
glUniform1i(param->loc, param->u.ival);
break;
case FLOAT:
glUniform1f(param->loc, param->u.fval);
break;
default:
break;
}
}*/
// set the dimension, must be after program is used.
//glUniform1i(wWLoc, window_width );
//glUniform1i(wHLoc, window_height );
printInstructions();
double frame_start = glfwGetTime();
double frame_time = 0.0;
double temp_time = 0.0;
//bool need_draw = true;
bool need_view_synch = true;
int mouseWheel = 0;
int mouseWheelDelta = 0;
double fIterations = (double)(iterations);
int mouseX, mouseY, curMouseX, curMouseY;
mouseX = mouseY = 0;
bool joystickPresent = glfwGetJoystickParam( GLFW_JOYSTICK_1, GLFW_PRESENT );
if(joystickPresent)
{
printf("Joystick present. Can be used to navigate in addition to mouse.\n");
}else
{
printf("no joystick present.\n");
}
// set up fonts
FTGLfont *font = NULL;
//font = ftglCreateBufferFont("/usr/share/fonts/truetype/freefont/FreeMono.ttf");
font = ftglCreatePixmapFont("/usr/share/fonts/truetype/freefont/FreeMono.ttf");
if( !font )
{
printf("failed to load font.");
}
ftglSetFontFaceSize(font, 50, 50);
//printf("%d\n", ftglGetFontError(font));
//ftglSetFontCharMap(font, ft_encoding_unicode);
//printf("%d\n", ftglGetFontError(font));
bool show_fps = true;
char text[256];
// keep on rendering the frame until escape is pressed.
while(glfwGetKey(GLFW_KEY_ESC) != GLFW_PRESS)
{
temp_time = glfwGetTime();
frame_time = temp_time - frame_start;
frame_start = temp_time;
// process input
if(glfwGetKey('E') == GLFW_PRESS)
{
printf("minx: %.31f\n", minx);
printf("miny: %.31f\n", miny);
printf("deltax: %.31f\n",deltax);
printf("deltay: %.31f\n",deltay);
printf("====================================\n");
}else if(glfwGetKey('P') == GLFW_PRESS)
{
saveFrameBuffer();
}else if(glfwGetKey('R') == GLFW_PRESS)
{
minx = -2.0;
miny = -1.0;
deltax = 3.0;
deltay = 2.0;
need_view_synch = true;
}else if(glfwGetKey('F') == GLFW_PRESS)
{
show_fps=~show_fps;
//printf("fps display toggled to: %d\n", show_fps);
}
else if(glfwGetKey(GLFW_KEY_RIGHT) == GLFW_PRESS)
{
fIterations += 5*(60*frame_time);
iterations = floor(fIterations);
need_view_synch = true;
}else if(glfwGetKey(GLFW_KEY_LEFT) == GLFW_PRESS)
{
if(iterations>1)
{
fIterations -= 5*(60*frame_time);
}
iterations = floor(fIterations);
need_view_synch = true;
}
// zooming using the arrow keys
if(glfwGetKey(GLFW_KEY_UP) == GLFW_PRESS)
{
zoomIn(2.0*zoom_factor*(frame_time*60.0));
need_view_synch = true;
}else if(glfwGetKey(GLFW_KEY_DOWN) == GLFW_PRESS)
{
zoomIn(-2.0*zoom_factor*(frame_time*60.0));
need_view_synch = true;
}
//changing the julia set constant
if(glfwGetKey('W') == GLFW_PRESS)
{
realc += .0025*frame_time*60.0;
need_view_synch = true;
}else if(glfwGetKey('S') == GLFW_PRESS)
{
realc -= .0025*frame_time*60.0;
need_view_synch = true;
}
if(glfwGetKey('A') == GLFW_PRESS)
{
imagc += .0025*frame_time*60.0;
need_view_synch = true;
}else if(glfwGetKey('D') == GLFW_PRESS)
{
imagc -= .0025*frame_time*60.0;
need_view_synch = true;
}
// changing the area visible (panning left and right)
glfwGetMousePos(&curMouseX, &curMouseY);
int mouseDeltax = curMouseX - mouseX;
int mouseDeltay = curMouseY - mouseY;
if(mouseDeltax||mouseDeltay)//if one of them is different
{
//printf("delta coordinates: (%d, %d)\n", mouseDeltax, mouseDeltay);
mouseX=curMouseX;
mouseY=curMouseY;
//printf("new mouse coordinates: (%d, %d)\n", x, y);
pan(zoom_factor*deltax*mouseDeltax/20.0, -1*zoom_factor*deltay*mouseDeltay/20.0);
need_view_synch = true;
}
if(joystickPresent)
{
float pos[4];
glfwGetJoystickPos(GLFW_JOYSTICK_1, pos, 4);
//the above function gives us bad results for my particular joystick :(, must fiddle around with numbers to get correct answer.
float xJoyPos = pos[0];//(pos[0]*32767)/128.0 - 1.0;
float yJoyPos = pos[1];//(pos[1]*32767)/128.0 + 1.0;
float zJoyPos = -1*pos[2];//-1*((pos[2]*32767)/128.0 - 1.0);
float rJoyPos = pos[3];
float temp = 0.0;
//printf("%f\n", xJoyPos);
if(xJoyPos>.02||xJoyPos<-.02)
{
temp = zoom_factor*xJoyPos*deltax*1.0*frame_time*60.0;
pan(temp, 0);
need_view_synch = true;
}
if(yJoyPos>.02||yJoyPos<-.02)
{
temp = zoom_factor*yJoyPos*deltay*1.0*frame_time*60.0;
pan(0, temp);
need_view_synch = true;
}
if(zJoyPos>.04||zJoyPos<-.04)
{
zoomIn(zJoyPos*scroll_zoom_factor*(frame_time*10.0));
need_view_synch = true;
}
if(rJoyPos>.02 || rJoyPos<-.02)
{
rotate( rJoyPos/5.0*frame_time );
need_view_synch = true;
}
unsigned char buttons[5];
glfwGetJoystickButtons(GLFW_JOYSTICK_1, buttons, 4);
if(buttons[0]==GLFW_PRESS)
{
saveFrameBuffer();
}
if(buttons[1]==GLFW_PRESS)
{
rotate( 0.35*frame_time );
need_view_synch = true;
}else if(buttons[2]==GLFW_PRESS)
{
rotate( -0.35*frame_time );
need_view_synch = true;
}
//printf("x:%f, y:%f\n", xJoyPos, yJoyPos);
}
// zooming using the mouse scroll
mouseWheelDelta = glfwGetMouseWheel() - mouseWheel;
mouseWheel = mouseWheel+mouseWheelDelta;
if(mouseWheelDelta != 0)
{
zoomIn(mouseWheelDelta*scroll_zoom_factor*(frame_time*60.0));
need_view_synch = true;
}
//printf("mouse wheel: %d\n", mouseWheelDelta);
if(need_view_synch)
{
synchVariableUniforms();
need_view_synch = false;
}
// update the time inside the shader for cool animations.
parameters[2].val.fval = frame_start;
parameters[2].needs_update = true;
synchParameters ( parameters );
//glUniform1f(timeLoc, frame_start);
// write fps and iterations to a string.
sprintf(text, "FPS: %4.1d; ITER: %d; ZOOMX: %-10.1f", (int)(floor(1.0/frame_time)), iterations, (3.0/deltax));
//sprintf("fps %f\n", 1.0/frame_time);
// clear the buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//since all calculations are being done in the fragment shader, all we draw is a surface.
glUseProgram(program);
glRects(-1, -1, 1, 1);
// render font on top of this?
if(show_fps != 0){
glUseProgram(0);
glColor3f(0.0f, 0.0f, 0.0f);
ftglRenderFont(font, text, FTGL_RENDER_ALL);
glUseProgram(program);
}
// note: swap buffers also updates the input events for glfw
glfwSwapBuffers();
}
// clean up the font and exit.
ftglDestroyFont(font);
return 1;
}
