diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/library_sdl.js | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/library_sdl.js b/src/library_sdl.js index 42207f23..71ab2277 100644 --- a/src/library_sdl.js +++ b/src/library_sdl.js @@ -1032,6 +1032,19 @@ var LibrarySDL = { return ret; }, + rotozoomSurface: function(src, angle, zoom, smooth) { + var srcData = SDL.surfaces[src]; + var w = srcData.width * zoom; + var h = srcData.height * zoom; + var diagonal = Math.ceil(Math.sqrt(Math.pow(w, 2) + Math.pow(h, 2))); + var ret = SDL.makeSurface(diagonal, diagonal, srcData.flags, false, 'rotozoomSurface'); + var dstData = SDL.surfaces[ret]; + dstData.ctx.translate(diagonal / 2, diagonal / 2); + dstData.ctx.rotate(angle * Math.PI / 180); + dstData.ctx.drawImage(srcData.canvas, -w / 2, -h / 2, w, h); + return ret; + }, + SDL_SetAlpha: function(surf, flag, alpha) { SDL.surfaces[surf].alpha = alpha; }, |