77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/* vim:expandtab:ts=2 sw=2:
|
|
*/
|
|
/* Grafx2 - The Ultimate 256-color bitmap paint program
|
|
|
|
Copyright 2018 Thomas Bernard
|
|
Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
|
|
|
|
Grafx2 is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; version 2
|
|
of the License.
|
|
|
|
Grafx2 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Grafx2; if not, see <http://www.gnu.org/licenses/>
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "gfx2surface.h"
|
|
#include "errors.h"
|
|
|
|
T_GFX2_Surface * New_GFX2_Surface(word width, word height)
|
|
{
|
|
T_GFX2_Surface * surface;
|
|
size_t size;
|
|
|
|
size = width * height;
|
|
if (size == 0) // surfaces with no pixels not allowed
|
|
return NULL;
|
|
|
|
surface = malloc(sizeof(T_GFX2_Surface));
|
|
if (surface == NULL)
|
|
return NULL;
|
|
surface->pixels = malloc(size);
|
|
if(surface->pixels == NULL)
|
|
{
|
|
free(surface);
|
|
return NULL;
|
|
}
|
|
memset(surface->palette, 0, sizeof(surface->palette));
|
|
surface->w = width;
|
|
surface->h = height;
|
|
return surface;
|
|
}
|
|
|
|
void Free_GFX2_Surface(T_GFX2_Surface * surface)
|
|
{
|
|
free(surface->pixels);
|
|
free(surface);
|
|
}
|
|
|
|
byte Get_GFX2_Surface_pixel(const T_GFX2_Surface * surface, int x, int y)
|
|
{
|
|
if (surface == NULL) return 0;
|
|
if (x<0 || x>=surface->w || y<0 || y>=surface->h)
|
|
{
|
|
Warning("Get_GFX2_Surface_pixel() out of bound access");
|
|
return 0;
|
|
}
|
|
return surface->pixels[x + surface->w * y];
|
|
}
|
|
|
|
void Set_GFX2_Surface_pixel(T_GFX2_Surface * surface, int x, int y, byte value)
|
|
{
|
|
if (surface == NULL) return;
|
|
if (x<0 || x>=surface->w || y<0 || y>=surface->h)
|
|
{
|
|
Warning("Set_GFX2_Surface_pixel() out of bound access");
|
|
return;
|
|
}
|
|
surface->pixels[x + surface->w * y] = value;
|
|
}
|