Sprite *LoadSwappedSprite(char *filename, int sizex, int sizey, int c1, int c2, int c3)
{
int i;
SDL_Surface *temp;
int n;
/*first search to see if the requested sprite image is already loaded*/
for(i = 0; i < MaxSprites; i++)
{
if((strncmp(filename,SpriteList[i].filename,80)==0)&&(SpriteList[i].loaded == 1)&&(sizex == SpriteList[i].w)&&(sizey == SpriteList[i].h))
{
SpriteList[i].used++;
return &SpriteList[i];
}
}
/*make sure we have the room for a new sprite*/
/*if it's not already in memory, then load it*/
n = -1;
for(i = 0; i < MaxSprites; i++)
{
if(!SpriteList[i].loaded)
{
n = i;
break;
}
}
/*if every slot has been loaded, find one that is no longer in use*/
if(n == -1)
{
for(i = 0; i < MaxSprites; i++)
{
if(SpriteList[i].used <= 0)
{
n = 1;
break;
}
}
if(n == -1)
{
fprintf(stderr,"Ran out of places for sprites!\n");
return NULL;
}
strcpy(SpriteList[n].filename,"\0");
if(SpriteList[n].surface != NULL)SDL_FreeSurface(SpriteList[n].surface);
SpriteList[n].surface = NULL;
}
temp = IMG_Load(filename);
if(temp == NULL)
{
fprintf(stderr,"unable to load a vital sprite: %s\n",SDL_GetError());
return NULL;
}
SDL_SetColorKey(temp, SDL_SRCCOLORKEY, SDL_MapRGB(temp->format, 255,255,255));
SpriteList[i].surface = SDL_DisplayFormat(temp);
SDL_FreeSurface(temp);
/*sets a transparent color for blitting.*/
//SDL_SetColorKey(SpriteList[i].image, SDL_SRCCOLORKEY , SDL_MapRGB(SpriteList[i].image->format, 255,255,255));
//fprintf(stderr,"asked for colors: %d,%d,%d \n",c1,c2,c3);
SwapSprite(SpriteList[i].surface,c1,c2,c3);
strncpy(SpriteList[i].filename,filename,80);
SpriteList[i].framesperline = 16;
if((sizex) && (sizey))/*as long as neither x and y are zero*/
{
SpriteList[i].numframes = (SpriteList[i].surface->w / sizex) * (SpriteList[i].surface->h / sizey);
}
else SpriteList[i].numframes = -1;
SpriteList[i].w = sizex;
SpriteList[i].h = sizey;
SpriteList[i].color1 = c1;
SpriteList[i].color2 = c2;
SpriteList[i].color3 = c3;
SpriteList[i].used++;
SpriteList[i].loaded = 1;
return &SpriteList[i];
}
Sprite *LoadSwappedSprite( char *filename, int sizex, int sizey, int c1, int c2, int c3 , int mipmapping)
{
int i;
int k,j;
SDL_Surface *temp;
SDL_Surface *temp1;
SDL_Surface *tempsurface;
int w, h;
Uint8 r,g,b,a;
/*first search to see if the requested sprite image is alreday loaded*/
for(i = 0; i < MaxSprites; i++)
{
if((strncmp(filename,SpriteList[i].filename,80)==0)&&(SpriteList[i].used >= 1)&&(c1 == SpriteList[i].color1)&&(c2 == SpriteList[i].color2)&&(c3 == SpriteList[i].color3))
{
SpriteList[i].used++;
return &SpriteList[i];
}
}
/*makesure we have the room for a new sprite*/
if(NumSprites + 1 >= MaxSprites)
{
fprintf(stderr, "Maximum Sprites Reached.\n");
exit(1);
}
/*if its not already in memory, then load it.*/
NumSprites++;
for(i = 0;i <= MaxSprites;i++)
{
if(!SpriteList[i].used)break;
}
temp = IMG_Load(filename);
if(temp == NULL)
{
fprintf(stderr,"unable to load a vital sprite: %s\n",SDL_GetError());
exit(0);
}
temp1 = SDL_DisplayFormatAlpha(temp);
strncpy(SpriteList[i].filename,filename,80);
SpriteList[i].framesperline = 16;
/*makes sure the width and height of each frame is opengl compatable*/
SpriteList[i].w = sizex;
SpriteList[i].h = sizey;
SpriteList[i].used++;
/*makes sure the width and height of the entire surface is opengl compatable*/
w = temp1->w;
h = temp1->h;
SpriteList[i].texWidth = (float)sizex/(float)w;
SpriteList[i].texHeight = (float)sizey/(float)h;
/*Creates an opengl compatable RGBA surface*/
tempsurface = SDL_CreateRGBSurface(SDL_HWSURFACE|SDL_SRCALPHA,w, h,S_Data.depth,rmask,gmask,bmask,amask);
/*This goes through the pixel data copying it and checking each pixel for the clear color, when found sets the alpha to 0*/
for(k=0;k < tempsurface->h; k++)
{
for(j=0;j < tempsurface->w; j++)
{
SDL_GetRGBA(getpixel(temp1, j, k), temp1->format, &r, &g, &b, &a);
putpixel(tempsurface, j, k, SDL_MapRGBA(tempsurface->format, r, g, b, a));
}
}
SpriteList[i].color1 = c1;
SpriteList[i].color2 = c2;
SpriteList[i].color3 = c3;
SwapSprite(tempsurface,c1,c2,c3);
glGenTextures(1, &SpriteList[i].image);
glBindTexture(GL_TEXTURE_2D,SpriteList[i].image);
if(mipmapping == 1)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, w, h, GL_RGBA, GL_UNSIGNED_BYTE, tempsurface->pixels);
}else
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, tempsurface->pixels);
}
SDL_FreeSurface(tempsurface);
tempsurface = NULL;
SDL_FreeSurface(temp1);
temp1 = NULL;
SDL_FreeSurface(temp);
temp = NULL;
return &SpriteList[i];
}
