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/*************************************************************************
* Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
#include "dimension.h"
#include <pthread.h>
#include <stdlib.h> /* For malloc(), free() */
/* Allocate a new canvas, of width x and height y */
dmnsn_canvas *
dmnsn_new_canvas(unsigned int x, unsigned int y)
{
/* Allocate the dmnsn_canvas struct */
dmnsn_canvas *canvas = malloc(sizeof(dmnsn_canvas));
if (canvas) {
/* Set the width and height */
canvas->x = x;
canvas->y = y;
/* Allocate the pixels */
canvas->pixels = malloc(sizeof(dmnsn_color)*x*y);
if (!canvas->pixels) {
free(canvas);
return NULL;
}
/* Allocate room for the optimizers */
canvas->optimizers = dmnsn_new_array(sizeof(dmnsn_canvas_optimizer));
canvas->too_late = 0;
}
return canvas;
}
/* Delete a dmnsn_canvas allocated with dmnsn_new_canvas */
void
dmnsn_delete_canvas(dmnsn_canvas *canvas)
{
unsigned int i;
dmnsn_canvas_optimizer optimizer;
if (canvas) {
/* Free the optimizers */
for (i = 0; i < dmnsn_array_size(canvas->optimizers); ++i) {
dmnsn_array_get(canvas->optimizers, i, &optimizer);
if (optimizer.free_fn) {
(*optimizer.free_fn)(optimizer.ptr);
}
}
/* Free the pixels and canvas */
free(canvas->pixels);
free(canvas);
}
}
/* Set a canvas optimizer */
int
dmnsn_optimize_canvas(dmnsn_canvas *canvas, dmnsn_canvas_optimizer optimizer)
{
if (canvas->too_late) {
/* Don't set an optimizer if dmnsn_set_pixel() has been called */
return 1;
} else {
dmnsn_array_push(canvas->optimizers, &optimizer);
return 0;
}
}
/* Set the color of a pixel */
void
dmnsn_set_pixel(dmnsn_canvas *canvas, unsigned int x, unsigned int y,
dmnsn_color color)
{
unsigned int i;
dmnsn_canvas_optimizer optimizer;
/* Don't allow any more optimizers */
canvas->too_late = 1;
/* Set the pixel */
canvas->pixels[y*canvas->x + x] = color;
/* Call the optimizers */
for (i = 0; i < dmnsn_array_size(canvas->optimizers); ++i) {
dmnsn_array_get(canvas->optimizers, i, &optimizer);
(*optimizer.optimizer_fn)(canvas, optimizer, x, y);
}
}
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