Image.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for OpenGL, SDL2 and GNU C.
 * Copyright (C) 2014 Jay Dolan <jay@jaydolan.com>
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 */
 
#include <assert.h>
#include <string.h>
 
#include <SDL_image.h>
 
#include "Image.h"
#include "Log.h"
 
#define _Class _Image
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
    Image *this = (Image *) self;
 
    SDL_FreeSurface(this->surface);
 
    super(Object, self, dealloc);
}
 
#pragma mark - Image
 
static Image *imageWithBytes(const uint8_t *bytes, size_t length) {
    return $(alloc(Image), initWithBytes, bytes, length);
}
 
static Image *imageWithData(const Data *data) {
    return $(alloc(Image), initWithData, data);
}
 
static Image *imageWithResource(const Resource *resource) {
    return $(alloc(Image), initWithResource, resource);
}
 
static Image *imageWithResourceName(const char *name) {
    return $(alloc(Image), initWithResourceName, name);
}
 
static Image *imageWithSurface(SDL_Surface *surface) {
    return $(alloc(Image), initWithSurface, surface);
}
 
static Image *initWithBytes(Image *self, const uint8_t *bytes, size_t length) {
 
    SDL_RWops *ops = SDL_RWFromConstMem(bytes, (int) length);
    if (ops) {
        SDL_Surface *surface = IMG_LoadTyped_RW(ops, 0, self->type);
        if (surface) {
            self = $(self, initWithSurface, surface);
            SDL_FreeSurface(surface);
        } else {
            self = release(self);
        }
    } else {
        self = release(self);
    }
 
    SDL_FreeRW(ops);
    return self;
}
 
static Image *initWithData(Image *self, const Data *data) {
 
    if (data) {
        self = $(self, initWithBytes, data->bytes, data->length);
    } else {
        self = release(self);
    }
 
    return self;
}
 
static Image *initWithResource(Image *self, const Resource *resource) {
 
    if (resource) {
        self->type = strrchr(resource->name, '.') ? strrchr(resource->name, '.') + 1 : NULL;
        self = $(self, initWithData, resource->data);
    } else {
        self = release(self);
    }
 
    return self;
}
 
static Image *initWithResourceName(Image *self, const char *name) {
 
    Resource *resource = $$(Resource, resourceWithName, name);
 
    self = $(self, initWithResource, resource);
 
    release(resource);
 
    return self;
}
 
static Image *initWithSurface(Image *self, SDL_Surface *surface) {
 
    self = (Image *) super(Object, self, init);
    if (self) {
 
        if (surface) {
            if (surface->format->format != SDL_PIXELFORMAT_ABGR8888) {
                self->surface = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ABGR8888, 0);
            } else {
                self->surface = surface;
                self->surface->refcount++;
            }
 
            assert(self->surface);
        }
    }
 
    return self;
}
 
static SDL_Size size(const Image *self) {
    return MakeSize(self->surface->w, self->surface->h);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
    ((ImageInterface *) clazz->interface)->imageWithBytes = imageWithBytes;
    ((ImageInterface *) clazz->interface)->imageWithData = imageWithData;
    ((ImageInterface *) clazz->interface)->imageWithResource = imageWithResource;
    ((ImageInterface *) clazz->interface)->imageWithResourceName = imageWithResourceName;
    ((ImageInterface *) clazz->interface)->imageWithSurface = imageWithSurface;
    ((ImageInterface *) clazz->interface)->initWithBytes = initWithBytes;
    ((ImageInterface *) clazz->interface)->initWithData = initWithData;
    ((ImageInterface *) clazz->interface)->initWithResource = initWithResource;
    ((ImageInterface *) clazz->interface)->initWithResourceName = initWithResourceName;
    ((ImageInterface *) clazz->interface)->initWithSurface = initWithSurface;
    ((ImageInterface *) clazz->interface)->size = size;
}
 
Class *_Image(void) {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "Image",
            .superclass = _Object(),
            .instanceSize = sizeof(Image),
            .interfaceOffset = offsetof(Image, interface),
            .interfaceSize = sizeof(ImageInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}
 
#undef _Class