Antialiasing is a new optional argument for sprite(). Default is off to prevent issues with transparent images.

Author: antirez

README.md

@@ -57,6 +57,7 @@ Drawing functions:
 * text(x,y,string): print the specified text at x,y using a bitmap font.
 * triangle(x1,y1,x2,y2,x3,y3): draw a triangle with the specified vertex.
 * getpixel(x,y): return the red,gree,blue value of the specified pixel.
+* sprite(file,x,y,[rotation],[antialiasing]): draw sprite at coordinates with the specified rotation (in degrees, default 0) and antialiasing (default false).
 
 Control functions:
 

framebuffer.c

@@ -105,10 +105,10 @@ void bfWriteString(frameBuffer *fb, int xp, int yp, const char *s, int len, int
  * the same interface with load81.c. */
 #define SPRITE_MT "l81.sprite_mt"
 
-void spriteBlit(frameBuffer *fb, void *sprite, int x, int y, int angle) {
+void spriteBlit(frameBuffer *fb, void *sprite, int x, int y, int angle, int aa) {
     SDL_Surface *s = sprite;
     if (s == NULL) return;
-    if (angle) s = rotozoomSurface(s,angle,1,1);
+    if (angle) s = rotozoomSurface(s,angle,1,aa);
     SDL_Rect dst = {x, fb->height-1-y - s->h, s->w, s->h};
     SDL_BlitSurface(s, NULL, fb->screen, &dst);
     if (angle) SDL_FreeSurface(s);

framebuffer.h

@@ -39,7 +39,7 @@ void bfWriteChar(frameBuffer *fb, int xp, int yp, int c, int r, int g, int b, in
 void bfWriteString(frameBuffer *fb, int xp, int yp, const char *s, int len, int r, int g, int b, int alpha);
 
 /* Sprites */
-void spriteBlit(frameBuffer *fb, void *sprite, int x, int y, int angle);
+void spriteBlit(frameBuffer *fb, void *sprite, int x, int y, int angle, int aa);
 void *spriteLoad(lua_State *L, const char *filename);
 void initSpriteEngine(lua_State *L);
 

load81.c

@@ -254,15 +254,16 @@ int getpixelBinding(lua_State *L) {
 
 int spriteBinding(lua_State *L) {
     const char *filename;
-    int x, y, angle;
+    int x, y, angle, antialiasing;
     void *sprite;
 
     filename = lua_tostring(L, 1);
     x = lua_tonumber(L, 2);
     y = lua_tonumber(L, 3);
     angle = luaL_optnumber(L,4,0);
+    antialiasing = lua_toboolean(L,5);
     sprite = spriteLoad(L,filename);
-    spriteBlit(l81.fb, sprite, x, y, angle);
+    spriteBlit(l81.fb, sprite, x, y, angle, antialiasing);
     return 1;
 }