diff options
| author | xgoff <antipotroast@gmail.com> | 2012-08-04 02:17:29 -0500 |
|---|---|---|
| committer | xgoff <antipotroast@gmail.com> | 2012-08-04 02:17:29 -0500 |
| commit | 0913693cde5fb74db76b2d283787ffb6a4d794ec (patch) | |
| tree | 6f180d8d6967702bcb3993527b25f129738acfae | |
| parent | 6de633350db152d47b53ae8ede75d0199bc22b7b (diff) | |
| download | love2d-fakecanvas-0913693cde5fb74db76b2d283787ffb6a4d794ec.tar.gz love2d-fakecanvas-0913693cde5fb74db76b2d283787ffb6a4d794ec.tar.bz2 love2d-fakecanvas-0913693cde5fb74db76b2d283787ffb6a4d794ec.tar.xz love2d-fakecanvas-0913693cde5fb74db76b2d283787ffb6a4d794ec.zip | |
zero-argument version of canvas:clear() is much faster now
| -rw-r--r-- | README.md | 2 | ||||
| -rw-r--r-- | fakecanvas.lua | 6 |
2 files changed, 6 insertions, 2 deletions
@@ -7,7 +7,7 @@ it is more or less a drop-in library, in that all you need to do is call `requir it uses (a few) screenshots in order to isolate drawing operations, which means there are some amusing drawbacks: * `setCanvas()` is fairly expensive -* clearing a canvas is really expensive +* non zero-argument versions of canvas:clear() are really expensive * each `setCanvas()` call will allocate several megs of ram, this isn't a huge deal if you draw to canvases only occasionally. draw to one every frame, though... * possible drawing issues if you call `love.graphics.present()` yourself, specifically between `setCanvas()` calls * canvas width/height cannot exceed the window's width/height, and if your hardware lacks PO2 support, canvases will be further limited to that as well. ie: for an 800x600 display the max canvas size is 512x512. 1024x768 will limit you to 1024x512, and so on. diff --git a/fakecanvas.lua b/fakecanvas.lua index c311b7e..863dca7 100644 --- a/fakecanvas.lua +++ b/fakecanvas.lua @@ -50,11 +50,13 @@ local options = { vflip = true, } +local blank function canvas:clear (...) -- other option is chucking out the imagedata and creating a new one, but i'd probably end up using mapPixel anyway local nargs = select("#", ...) if nargs == 0 then - canvases[self]._imagedata:mapPixel(function () return 0, 0, 0, 0 end) + local id = canvases[self]._imagedata + id:paste(blank, 0, 0, 0, 0, id:getWidth(), id:getHeight()) elseif nargs == 1 and type(...) == "table" then local t = ... local r, g, b, a = tonumber(t[1]) or 0, tonumber(t[2]) or 0, tonumber(t[3]) or 0, tonumber(t[4]) or 255 @@ -318,6 +320,8 @@ function M.getOption (name) return options[name] end +blank = love.image.newImageData(M.getMaxCanvasSize()) + M.enable() return M
\ No newline at end of file |