ImageView.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.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#include <assert.h>
 
#include "ImageView.h"
 
const EnumName GLBlendNames[] = MakeEnumNames(
    MakeEnumName(GL_CONSTANT_ALPHA),
    MakeEnumName(GL_CONSTANT_COLOR),
    MakeEnumName(GL_DST_ALPHA),
    MakeEnumName(GL_DST_COLOR),
    MakeEnumName(GL_ONE),
    MakeEnumName(GL_ONE_MINUS_DST_ALPHA),
    MakeEnumName(GL_ONE_MINUS_DST_COLOR),
    MakeEnumName(GL_ONE_MINUS_SRC_ALPHA),
    MakeEnumName(GL_ONE_MINUS_SRC_COLOR),
    MakeEnumName(GL_SRC_ALPHA),
    MakeEnumName(GL_SRC_COLOR),
    MakeEnumName(GL_ZERO)
);
 
#define _Class _ImageView
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
    ImageView *this = (ImageView *) self;
 
    release(this->image);
 
    if (this->texture) {
        glDeleteTextures(1, &this->texture);
    }
 
    super(Object, self, dealloc);
}
 
#pragma mark - View
 
static void awakeWithDictionary(View *self, const Dictionary *dictionary) {
 
    super(View, self, awakeWithDictionary, dictionary);
 
    ImageView *this = (ImageView *) self;
 
    const Inlet inlets[] = MakeInlets(
        MakeInlet("blend.src", InletTypeEnum, &this->blend.src, (ident) GLBlendNames),
        MakeInlet("blend.dst", InletTypeEnum, &this->blend.dst, (ident) GLBlendNames),
        MakeInlet("color", InletTypeColor, &this->color, NULL),
        MakeInlet("image", InletTypeImage, &this->image, NULL)
    );
 
    $(self, bind, inlets, dictionary);
}
 
static View *init(View *self) {
    return (View *) $((ImageView *) self, initWithImage, NULL);
}
 
static void render(View *self, Renderer *renderer) {
 
    super(View, self, render, renderer);
 
    ImageView *this = (ImageView *) self;
 
    if (this->texture == 0) {
        if (this->image) {
            this->texture = $(renderer, createTexture, this->image->surface);
            assert(this->texture);
        }
    }
 
    if (this->texture) {
 
        // TODO: Actually use self->blend
 
        $(renderer, setDrawColor, &this->color);
        const SDL_Rect frame = $(self, renderFrame);
        $(renderer, drawTexture, this->texture, &frame);
        $(renderer, setDrawColor, &Colors.White);
    }
}
 
static void renderDeviceWillReset(View *self) {
 
    ImageView *this = (ImageView *) self;
 
    if (this->texture) {
        glDeleteTextures(1, &this->texture);
    }
 
    this->texture = 0;
 
    super(View, self, renderDeviceWillReset);
}
 
#pragma mark - ImageView
 
static ImageView *initWithFrame(ImageView *self, const SDL_Rect *frame) {
 
    self = (ImageView *) super(View, self, initWithFrame, frame);
    if (self) {
        self->blend.src = GL_SRC_ALPHA;
        self->blend.dst = GL_ONE_MINUS_SRC_ALPHA;
 
        self->color = Colors.White;
    }
 
    return self;
}
 
static ImageView *initWithImage(ImageView *self, Image *image) {
 
    self = (ImageView *) $(self, initWithFrame, NULL);
    if (self) {
        $(self, setImage, image);
    }
 
    return self;
}
 
static void setImage(ImageView *self, Image *image) {
 
    release(self->image);
 
    if (image) {
        self->image = retain(image);
 
        const SDL_Size size = $((View *) self, size);
        const SDL_Size imageSize = $(image, size);
 
        if (size.w == 0 && size.h == 0) {
            $((View *) self, resize, &imageSize);
        }
    } else {
        self->image = NULL;
    }
 
    self->texture = 0;
}
 
static void setImageWithResource(ImageView *self, const Resource *resource) {
 
    Image *image = $$(Image, imageWithResource, resource);
 
    $(self, setImage, image);
 
    release(image);
}
 
static void setImageWithResourceName(ImageView *self, const char *name) {
 
    Resource *resource = $$(Resource, resourceWithName, name);
 
    $(self, setImageWithResource, resource);
 
    release(resource);
}
 
static void setImageWithSurface(ImageView *self, SDL_Surface *surface) {
 
    $(self, setImage, NULL);
 
    if (surface) {
        Image *image = $(alloc(Image), initWithSurface, surface);
        assert(image);
 
        $(self, setImage, image);
 
        release(image);
    }
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
    ((ViewInterface *) clazz->interface)->awakeWithDictionary = awakeWithDictionary;
    ((ViewInterface *) clazz->interface)->init = init;
    ((ViewInterface *) clazz->interface)->render = render;
    ((ViewInterface *) clazz->interface)->renderDeviceWillReset = renderDeviceWillReset;
 
    ((ImageViewInterface *) clazz->interface)->initWithFrame = initWithFrame;
    ((ImageViewInterface *) clazz->interface)->initWithImage = initWithImage;
    ((ImageViewInterface *) clazz->interface)->setImage = setImage;
    ((ImageViewInterface *) clazz->interface)->setImageWithResource = setImageWithResource;
    ((ImageViewInterface *) clazz->interface)->setImageWithResourceName = setImageWithResourceName;
    ((ImageViewInterface *) clazz->interface)->setImageWithSurface = setImageWithSurface;
}
 
Class *_ImageView(void) {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "ImageView",
            .superclass = _View(),
            .instanceSize = sizeof(ImageView),
            .interfaceOffset = offsetof(ImageView, interface),
            .interfaceSize = sizeof(ImageViewInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}
 
#undef _Class