Open source, Open mind.
SDL_Surface *CreateSurface(size_t w, size_t h)
{
SDL_Surface *surface;
static int rmask, gmask, bmask, amask;
rmask = 0xF800;
gmask = 0x07E0;
bmask = 0x001f;
amask = 0;
surface = SDL_CreateRGBSurface(SDL_SWSURFACE , w, h, 16, rmask, gmask,bmask, amask);
return surface;
}
typedef struct _Point {
int x, y;
} Point;
Point points[640][480];
int SDL_GetX(int w ,int x, int nw) {
float xp = (float)x * (float)w / (float)nw;
return (int)xp;
}
int SDL_GetY(int h, int y, int nh) {
float yp = (float)y * (float)h / (float)nh;
return (int)yp;
}
void InitPoints() {
int i;
for(i = 0; i < 640; i++) {
for(int z = 0; z < 480; z++) {
points[i][z].x = SDL_GetX(640, i, 320);
points[i][z].y = SDL_GetY(480, z, 240);
}
}
}
void CopySurface(SDL_Surface *from, SDL_Surface *to) {
Uint16 *buffer, *buffer_to, color;
if(SDL_MUSTLOCK(from))
SDL_LockSurface(from);
if(SDL_MUSTLOCK(to))
SDL_LockSurface(to);
buffer = (Uint16*)from->pixels;
buffer_to = (Uint16*)to->pixels;
color = 0;
for(int x = 0; x < to->w-1; x++) {
for(int y = 0; y < to->h-1; y++) {
int cx,cy;
cx = points[x][y].x;
cy = points[x][y].y;
color = *(buffer+(cy*from->pitch/2)+cx);
*(buffer_to+(y*to->pitch/2)+x) = color;
}
}
if(SDL_MUSTLOCK(from))
SDL_UnlockSurface(from);
if(SDL_MUSTLOCK(to))
SDL_UnlockSurface(to);
}
