imported Löve GLES branch (changeset 1ba9037e558b)

jni/love/src/modules/graphics/opengl/wrap_Canvas.cpp

@@ -0,0 +1,245 @@
+/**
+ * Copyright (c) 2006-2013 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+#include "Graphics.h"
+#include "wrap_Canvas.h"
+
+namespace love
+{
+namespace graphics
+{
+namespace opengl
+{
+
+Canvas *luax_checkcanvas(lua_State *L, int idx)
+{
+	return luax_checktype<Canvas>(L, idx, "Canvas", GRAPHICS_CANVAS_T);
+}
+
+int w_Canvas_renderTo(lua_State *L)
+{
+	// As startGrab() clears the framebuffer, better not allow
+	// grabbing inside another grabbing
+	if (Canvas::current != NULL)
+	{
+		Canvas::bindDefaultCanvas();
+		return luaL_error(L, "Current render target not the default canvas!");
+	}
+
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	luaL_checktype(L, 2, LUA_TFUNCTION);
+
+	EXCEPT_GUARD(canvas->startGrab();)
+
+	lua_settop(L, 2); // make sure the function is on top of the stack
+	lua_call(L, 0, 0);
+	canvas->stopGrab();
+
+	return 0;
+}
+
+int w_Canvas_getImageData(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	love::image::Image *image = luax_getmodule<love::image::Image>(L, "image", MODULE_IMAGE_T);
+	love::image::ImageData *img = canvas->getImageData(image);
+	luax_pushtype(L, "ImageData", IMAGE_IMAGE_DATA_T, img);
+	return 1;
+}
+
+int w_Canvas_getPixel(lua_State * L)
+{
+	Canvas * canvas = luax_checkcanvas(L, 1);
+	int x = luaL_checkint(L, 2);
+	int y = luaL_checkint(L, 3);
+	unsigned char c[4];
+
+	EXCEPT_GUARD(canvas->getPixel(c, x, y);)
+
+	lua_pushnumber(L, c[0]);
+	lua_pushnumber(L, c[1]);
+	lua_pushnumber(L, c[2]);
+	lua_pushnumber(L, c[3]);
+	return 4;
+}
+
+int w_Canvas_setFilter(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+
+	Image::Filter f;
+
+	const char *minstr = luaL_checkstring(L, 2);
+	const char *magstr = luaL_optstring(L, 3, minstr);
+
+	if (!Image::getConstant(minstr, f.min))
+		return luaL_error(L, "Invalid filter mode: %s", minstr);
+	if (!Image::getConstant(magstr, f.mag))
+		return luaL_error(L, "Invalid filter mode: %s", magstr);
+
+	f.anisotropy = (float) luaL_optnumber(L, 4, 1.0);
+
+	canvas->setFilter(f);
+
+	return 0;
+
+}
+
+int w_Canvas_getFilter(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	const Image::Filter f = canvas->getFilter();
+
+	const char *minstr;
+	const char *magstr;
+	Image::getConstant(f.min, minstr);
+	Image::getConstant(f.mag, magstr);
+
+	lua_pushstring(L, minstr);
+	lua_pushstring(L, magstr);
+	lua_pushnumber(L, f.anisotropy);
+
+	return 3;
+}
+
+int w_Canvas_setWrap(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+
+	Image::Wrap w;
+
+	const char *sstr = luaL_checkstring(L, 2);
+	const char *tstr = luaL_optstring(L, 3, sstr);
+
+	if (!Image::getConstant(sstr, w.s))
+		return luaL_error(L, "Invalid wrap mode: %s", sstr);
+	if (!Image::getConstant(tstr, w.t))
+		return luaL_error(L, "Invalid wrap mode, %s", tstr);
+
+	canvas->setWrap(w);
+
+	return 0;
+}
+
+int w_Canvas_getWrap(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	const Image::Wrap w = canvas->getWrap();
+
+	const char *wrap_s;
+	const char *wrap_t;
+	Image::getConstant(w.s, wrap_s);
+	Image::getConstant(w.t, wrap_t);
+
+	lua_pushstring(L, wrap_s);
+	lua_pushstring(L, wrap_t);
+
+	return 2;
+}
+
+int w_Canvas_clear(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	Color c;
+	if (lua_isnoneornil(L, 2))
+	{
+		c.set(0, 0, 0, 0);
+	}
+	else if (lua_istable(L, 2))
+	{
+		for (int i = 1; i <= 4; i++)
+			lua_rawgeti(L, 2, i);
+
+		c.r = (unsigned char)luaL_checkinteger(L, -4);
+		c.g = (unsigned char)luaL_checkinteger(L, -3);
+		c.b = (unsigned char)luaL_checkinteger(L, -2);
+		c.a = (unsigned char)luaL_optinteger(L, -1, 255);
+
+		lua_pop(L, 4);
+	}
+	else
+	{
+		c.r = (unsigned char)luaL_checkinteger(L, 2);
+		c.g = (unsigned char)luaL_checkinteger(L, 3);
+		c.b = (unsigned char)luaL_checkinteger(L, 4);
+		c.a = (unsigned char)luaL_optinteger(L, 5, 255);
+	}
+	canvas->clear(c);
+
+	return 0;
+}
+
+int w_Canvas_getWidth(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	lua_pushnumber(L, canvas->getWidth());
+	return 1;
+}
+
+int w_Canvas_getHeight(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	lua_pushnumber(L, canvas->getHeight());
+	return 1;
+}
+
+int w_Canvas_getDimensions(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	lua_pushnumber(L, canvas->getWidth());
+	lua_pushnumber(L, canvas->getHeight());
+	return 2;
+}
+
+int w_Canvas_getType(lua_State *L)
+{
+	Canvas *canvas = luax_checkcanvas(L, 1);
+	Canvas::TextureType type = canvas->getTextureType();
+	const char *str;
+	Canvas::getConstant(type, str);
+	lua_pushstring(L, str);
+	return 1;
+}
+
+static const luaL_Reg functions[] =
+{
+	{ "renderTo", w_Canvas_renderTo },
+	{ "getImageData", w_Canvas_getImageData },
+	{ "getPixel", w_Canvas_getPixel },
+	{ "setFilter", w_Canvas_setFilter },
+	{ "getFilter", w_Canvas_getFilter },
+	{ "setWrap", w_Canvas_setWrap },
+	{ "getWrap", w_Canvas_getWrap },
+	{ "clear", w_Canvas_clear },
+	{ "getWidth", w_Canvas_getWidth },
+	{ "getHeight", w_Canvas_getHeight },
+	{ "getDimensions", w_Canvas_getDimensions },
+	{ "getType", w_Canvas_getType },
+	{ 0, 0 }
+};
+
+extern "C" int luaopen_canvas(lua_State *L)
+{
+	return luax_register_type(L, "Canvas", functions);
+}
+
+} // opengl
+} // graphics
+} // love