static PyObject*
_gfx_rotozoomsize (PyObject *self, PyObject *args)
{
PyObject *obj = NULL;
int w, h, dstw, dsth;
double angle, zoom;
if (!PyArg_ParseTuple (args, "iidd:rotozoom_size", &w, &h, &angle, &zoom))
{
PyErr_Clear ();
if (PyArg_ParseTuple (args, "Odd:rotozoom_size", &obj, &angle, &zoom))
{
if (PySDLSurface_Check (obj))
{
w = ((PySDLSurface *)obj)->surface->w;
h = ((PySDLSurface *)obj)->surface->w;
}
else
{
if (!SizeFromObj (obj, (pgint32*)&w, (pgint32*)&h))
return NULL;
}
}
else
return NULL;
}
rotozoomSurfaceSize (w, h, angle, zoom, &dstw, &dsth);
return Py_BuildValue ("(ii)", dstw, dsth);
}
void sprite_gen_rotation(Sprite *sprite)
{
rotozoomSurfaceSize(
sprite->frame_size.x,
sprite->frame_size.y,
45, // to maximize size
ZOOM, // no zoom
&sprite->rotated_frame_size.x,
&sprite->rotated_frame_size.y
);
if(sprite->rotated)
SDL_FreeSurface(sprite->rotated);
sprite->rotated = SDL_CreateRGBSurface(SDL_HWSURFACE,
sprite->rotated_frame_size.x * sprite->frame_count,
sprite->rotated_frame_size.y * ACTION_COUNT * 360/ANGLE_STEP,
RGBA_FORMAT);
if(sprite->rotated == NULL) {
fprintf(stderr, "CreateRGBSurface failed: %s\n", SDL_GetError());
exit(1);
}
//printf("cache size %dx%d for %d angles\n", sprite->rotated->w, sprite->rotated->h, 360/ANGLE_STEP);
SDL_Surface *element = SDL_CreateRGBSurface(SDL_HWSURFACE,
sprite->frame_size.x,
sprite->frame_size.y,
RGBA_FORMAT);
SDL_SetAlpha(sprite->source,0,0xff);
SDL_SetAlpha(element,0,0xff);
SDL_SetAlpha(sprite->rotated,SDL_SRCALPHA,0xff);
int frame, action, angle;
for(action=0; action<ACTION_COUNT; action++) {
for(frame=0; frame<sprite->frame_count; frame++) {
SDL_Rect src;
sprite_origin_rect(sprite, action, frame, &src);
for(angle=0; angle<360; angle+=ANGLE_STEP) {
SDL_Rect dst;
sprite_rotated_rect(sprite, action, frame, angle, &dst);
SDL_FillRect(element, NULL, 0x00000000);
SDL_BlitSurface( sprite->source, &src, element, NULL );
SDL_Surface *rotozoom = rotozoomSurface(element, angle+90, ZOOM, SMOOTHING_ON); // XXX 90 offset, because the sprite images are looking downwards
SDL_SetAlpha(rotozoom,0,0);
SDL_SetColorKey(rotozoom,0,0);
dst.x += dst.w/2 - rotozoom->w/2;
dst.y += dst.h/2 - rotozoom->h/2; // center
SDL_BlitSurface(rotozoom, NULL, sprite->rotated, &dst );
SDL_FreeSurface(rotozoom);
}
}
}
SDL_FreeSurface(element);
}
