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Fix Issue #476: Add HDR Canvas (thanks, Alexander Szpakowski!).

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* Add `love.graphics.isSupported("hdrcanvas")' to query whether the hardware
  actually supports HDR canvases.

* Add optional third argument to `love.graphics.newCanvas(w,h, type)', where
  `type' is one of "normal" or "hdr" and defaults to "normal". HDR canvases
  use floating point that can have values > 1 to store pixels, allowing for
  HDR rendering and other higher level lighting techniques when combined with
  pixel effects.

* Add `canvas:getType()'.
This commit is contained in:
vrld
2012-10-11 22:22:10 +02:00
parent 7364e52ebc
commit ccdf6e1c00
9 changed files with 148 additions and 35 deletions
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src/modules/graphics/opengl/wrap_Graphics.cpp
+11 -4
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@@ -395,14 +395,17 @@ int w_newParticleSystem(lua_State *L)
int w_newCanvas(lua_State *L)
{
// check if width and height are given. else default to screen dimensions.
int width = luaL_optint(L, 1, instance->getWidth());
int height = luaL_optint(L, 2, instance->getHeight());
glGetError(); // clear opengl error flag
int width = luaL_optint(L, 1, instance->getWidth());
int height = luaL_optint(L, 2, instance->getHeight());
const char *str = luaL_optstring(L, 3, "normal");
Canvas::TextureType texture_type;
Canvas::getConstant(str, texture_type);
Canvas *canvas = NULL;
try
{
canvas = instance->newCanvas(width, height);
canvas = instance->newCanvas(width, height, texture_type);
}
catch(Exception &e)
{
@@ -820,6 +823,10 @@ int w_isSupported(lua_State *L)
if (!Canvas::isSupported())
supported = false;
break;
case Graphics::SUPPORT_HDR_CANVAS:
if (!Canvas::isHdrSupported())
supported = false;
break;
case Graphics::SUPPORT_PIXELEFFECT:
if (!PixelEffect::isSupported())
supported = false;