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Add guards to prevent fbo nesting

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This commit is contained in:
vrld
2010-08-13 21:04:32 +02:00
parent 35093a5c45
commit ce0006d04c
3 changed files with 32 additions and 9 deletions
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src/modules/graphics/opengl/wrap_Framebuffer.cpp
+11 -4
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@@ -17,12 +17,16 @@ namespace opengl
if (!lua_isfunction(L, 2))
return luaL_error(L, "Need a function to render to fbo");
fbo->grab();
// prevent nesting
if (!fbo->grab())
return luaL_error(L, "Cannot grab screen. May be caused by nesting or forgetting to stop()");
lua_settop(L, 2); // make sure the function is on top of the stack
lua_pcall(L, 0, 0, 0);
fbo->stop();
// fbo can be stopped in function.
if (!fbo->stop())
return luaL_error(L, "Grabbing already stopped.");
return 0;
}
@@ -30,14 +34,17 @@ namespace opengl
int w_Framebuffer_grab(lua_State * L)
{
Framebuffer * fbo = luax_checkfbo(L, 1);
fbo->grab();
// prevent nesting
if (!fbo->grab())
return luaL_error(L, "Cannot grab screen. May be caused by nesting or forgetting to stop()");
return 0;
}
int w_Framebuffer_stop(lua_State * L)
{
Framebuffer * fbo = luax_checkfbo(L, 1);
fbo->stop();
if (!fbo->stop())
return luaL_error(L, "Grabbing already stopped.");
return 0;
}