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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <SDL.h>
#include <SDL_image.h>
#include <SDL_rotozoom.h>
#include "osc_graphics.h"
#include "layer_image.h"
Layer::CtorInfo LayerImage::ctor_info = {"image", "s" /* file */};
LayerImage::LayerImage(const char *name, SDL_Rect geo, float opacity,
const char *file) :
Layer(name),
surf_alpha(NULL), surf_scaled(NULL), surf(NULL)
{
file_osc_id = register_method("file", "s",
(OSCServer::MethodHandlerCb)file_osc);
LayerImage::alpha(opacity);
LayerImage::geo(geo);
LayerImage::file(file);
}
void
LayerImage::geo(SDL_Rect geo)
{
if (!geo.x && !geo.y && !geo.w && !geo.h)
geov = (SDL_Rect){0, 0, screen->w, screen->h};
else
geov = geo;
if (!surf)
return;
if (surf_scaled &&
surf_scaled->w == geov.w && surf_scaled->h == geov.h)
return;
SDL_FREESURFACE_SAFE(surf_alpha);
SDL_FREESURFACE_SAFE(surf_scaled);
if (surf->w != geov.w || surf->h != geov.h) {
surf_scaled = zoomSurface(surf,
(double)geov.w/surf->w,
(double)geov.h/surf->h,
SMOOTHING_ON);
}
alpha(alphav);
}
void
LayerImage::alpha(float opacity)
{
SDL_Surface *use_surf = surf_scaled ? : surf;
Uint8 alpha = (Uint8)ceilf(opacity*SDL_ALPHA_OPAQUE);
alphav = opacity;
if (!use_surf)
return;
if (!use_surf->format->Amask) {
if (alpha == SDL_ALPHA_OPAQUE)
SDL_SetAlpha(use_surf, 0, 0);
else
SDL_SetAlpha(use_surf, SDL_SRCALPHA | SDL_RLEACCEL, alpha);
return;
}
if (alpha == SDL_ALPHA_OPAQUE) {
SDL_FREESURFACE_SAFE(surf_alpha);
return;
}
if (!surf_alpha) {
surf_alpha = SDL_CreateRGBSurface(use_surf->flags,
use_surf->w, use_surf->h,
use_surf->format->BitsPerPixel,
use_surf->format->Rmask,
use_surf->format->Gmask,
use_surf->format->Bmask,
use_surf->format->Amask);
}
rgba_blit_with_alpha(use_surf, surf_alpha, alpha);
}
void
LayerImage::file(const char *file)
{
SDL_FREESURFACE_SAFE(surf_alpha);
SDL_FREESURFACE_SAFE(surf_scaled);
SDL_FREESURFACE_SAFE(surf);
if (!file || !*file)
return;
surf = IMG_Load(file);
if (!surf) {
SDL_IMAGE_ERROR("IMG_Load");
exit(EXIT_FAILURE);
}
geo(geov);
}
void
LayerImage::frame(SDL_Surface *target)
{
if (surf)
SDL_BlitSurface(surf_alpha ? : surf_scaled ? : surf, NULL,
target, &geov);
}
LayerImage::~LayerImage()
{
unregister_method(file_osc_id);
SDL_FREESURFACE_SAFE(surf_alpha);
SDL_FREESURFACE_SAFE(surf_scaled);
SDL_FREESURFACE_SAFE(surf);
}
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