void widgetCompositeImpl(widget *self)
{
float blendColour[4];
int i;
// Do not composite unless we are visible
if (!self->isVisible)
{
return;
}
// Save the current model-view matrix
glPushMatrix();
// Translate such that (0,0) is the top-left of ourself
glTranslatef(self->offset.x, self->offset.y, 0.0f);
// Scale if necessary
glScalef(self->scale.x, self->scale.y, 1.0f);
// Rotate ourself
glRotatef(self->rotate, 0.0f, 0.0f, 1.0f);
// Set our alpha (blend colour)
glGetFloatv(GL_BLEND_COLOR, blendColour);
glBlendColor(1.0f, 1.0f, 1.0f, blendColour[3] * self->alpha);
// Composite ourself
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, self->textureId);
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(0.0f, self->size.y);
glVertex2f(0.0f, self->size.y);
glTexCoord2f(0.0f, 0.0f);
glVertex2f(0.0f, 0.0f);
glTexCoord2f(self->size.x, self->size.y);
glVertex2f(self->size.x, self->size.y);
glTexCoord2f(self->size.x, 0.0f);
glVertex2f(self->size.x, 0.0f);
glEnd();
// Now our children
for (i = 0; i < vectorSize(self->children); i++)
{
widget *child = vectorAt(self->children, i);
// Composite
widgetComposite(child);
}
// Restore the model-view matrix
glPopMatrix();
// Restore the blend colour
glBlendColor(1.0f, 1.0f, 1.0f, blendColour[3]);
}
int main(int argc, char *argv[])
{
SDL_Surface *screen;
SDL_Event sdlEvent;
bool quit = false;
lua_State* L;
// Make sure everything is cleaned up on quit
atexit(SDL_Quit);
// Init SDL
if (SDL_Init(SDL_INIT_VIDEO) < -1)
{
fprintf(stderr, "SDL_init: %s\n", SDL_GetError());
exit(1);
}
// Enable UNICODE support (for key events)
SDL_EnableUNICODE(true);
// Enable double-buffering
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
// Enable sync-to-vblank
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1);
// 800x600 true colour
screen = SDL_SetVideoMode(800, 600, 32, SDL_OPENGL);
if (screen == NULL)
{
fprintf(stderr, "SDL_SetVideoMode: %s\n", SDL_GetError());
exit(1);
}
SDL_WM_SetCaption("Warzone UI Simulator", NULL);
// Init OpenGL
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
glCullFace(GL_BACK);
glEnable(GL_BLEND);
glBlendFunc(GL_CONSTANT_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBlendColor(1.0f, 1.0f, 1.0f, 1.0f);
glEnable(GL_TEXTURE_RECTANGLE_ARB);
glViewport(0, 0, 800, 600);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, 800, 600, 0.0, -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/*
* Create the GUI
*/
widgetSDLInit();
L = lua_open_betawidget();
createGUI(L);
// Main event loop
while (!quit)
{
int i;
while (SDL_PollEvent(&sdlEvent))
{
if (sdlEvent.type == SDL_QUIT)
{
quit = true;
}
else
{
widgetHandleSDLEvent(&sdlEvent);
}
}
// Fire timer events
widgetFireTimers();
glClear(GL_COLOR_BUFFER_BIT);
for (i = 0; i < vectorSize(windowGetWindowVector()); i++)
{
window *wnd = vectorAt(windowGetWindowVector(), i);
widgetDraw(WIDGET(wnd));
widgetComposite(WIDGET(wnd));
}
SDL_GL_SwapBuffers();
}
lua_close(L);
widgetSDLQuit();
return EXIT_SUCCESS;
}
