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muzyka i może jakieś drobiazgi

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This commit is contained in:
mateuszb
2007-06-19 14:41:03 +00:00
parent e491be6041
commit de95bb0753
5 changed files with 95 additions and 2 deletions
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65
SDL_Extensions.cpp
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@ -149,3 +149,68 @@ SDL_Surface * CSDL_Ext::rotate03(SDL_Surface * toRot)
SDL_FreeSurface(first);
return ret;
}
//converts surface to cursor
SDL_Cursor * CSDL_Ext::SurfaceToCursor(SDL_Surface *image, int hx, int hy)
{
int w, x, y;
Uint8 *data, *mask, *d, *m, r, g, b;
Uint32 color;
SDL_Cursor *cursor;
w = (image->w + 7) / 8;
data = (Uint8 *)alloca(w * image->h * 2);
if (data == NULL)
return NULL;
memset(data, 0, w * image->h * 2);
mask = data + w * image->h;
if (SDL_MUSTLOCK(image))
SDL_LockSurface(image);
for (y = 0; y < image->h; y++)
{
d = data + y * w;
m = mask + y * w;
for (x = 0; x < image->w; x++)
{
color = CSDL_Ext::SDL_GetPixel(image, x, y);
if ((image->flags & SDL_SRCCOLORKEY) == 0 || color != image->format->colorkey)
{
SDL_GetRGB(color, image->format, &r, &g, &b);
color = (r + g + b) / 3;
m[x / 8] |= 128 >> (x & 7);
if (color < 128)
d[x / 8] |= 128 >> (x & 7);
}
}
}
if (SDL_MUSTLOCK(image))
SDL_UnlockSurface(image);
cursor = SDL_CreateCursor(data, mask, w, image->h, hx, hy);
return cursor;
}
Uint32 CSDL_Ext::SDL_GetPixel(SDL_Surface *surface, int x, int y)
{
int bpp = surface->format->BytesPerPixel;
/* Here p is the address to the pixel we want to retrieve */
Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp;
switch(bpp) {
case 1:
return *p;
case 2:
return *(Uint16 *)p;
case 3:
if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
return p[0] << 16 | p[1] << 8 | p[2];
else
return p[0] | p[1] << 8 | p[2] << 16;
case 4:
return *(Uint32 *)p;
default:
return 0; /* shouldn't happen, but avoids warnings */
}
}