void widgetDraw(widget *self)
{
int i;
// See if we need to be redrawn
if (self->needsRedraw)
{
void *bits = cairo_image_surface_get_data(cairo_get_target(self->cr));
self->needsRedraw = false;
// Mark the texture as needing uploading
self->textureNeedsUploading = true;
// Clear the current context
cairo_set_operator(self->cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(self->cr, 0.0, 0.0, 0.0, 0.0);
cairo_paint(self->cr);
// Restore the compositing operator back to the default
cairo_set_operator(self->cr, CAIRO_OPERATOR_OVER);
// Save (push) the current context
cairo_save(self->cr);
// Redaw ourself
widgetDoDraw(self);
// Restore the context
cairo_restore(self->cr);
// Update the texture if widgetEndGL has not done it for us
if (self->textureNeedsUploading)
{
// Flush the cairo surface to ensure that all drawing is completed
cairo_surface_flush(cairo_get_target(self->cr));
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, self->textureId);
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, self->size.x,
self->size.y, 0, GL_BGRA, GL_UNSIGNED_BYTE, bits);
self->textureNeedsUploading = false;
}
}
// Draw our children (even if we did not need redrawing our children might)
for (i = 0; i < vectorSize(self->children); i++)
{
widget *child = vectorAt(self->children, i);
// Ask the child to re-draw itself
widgetDraw(child);
}
}
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;
}
