Fix sound not being played at the correct place. - minetest.git

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author	Novatux <nathanael.courant@laposte.net>	2014-03-15 15:08:43 +0100
committer	Novatux <nathanael.courant@laposte.net>	2014-03-15 16:25:34 +0100
commit	93729b09d5e02ed64ad7322137654c38bf858037 (patch)
tree	95e01c6cdef0a328f6ff5d1c1b72f58924e0f600 /src/light.h
parent	362ef5f6ced862daa4733034810d0b07e2ad5d89 (diff)
download	minetest-93729b09d5e02ed64ad7322137654c38bf858037.tar.gz minetest-93729b09d5e02ed64ad7322137654c38bf858037.tar.bz2 minetest-93729b09d5e02ed64ad7322137654c38bf858037.zip

Fix sound not being played at the correct place.

Diffstat (limited to 'src/light.h')

0 files changed, 0 insertions, 0 deletions

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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "tile.h"

#include <ICameraSceneNode.h>
#include "util/string.h"
#include "util/container.h"
#include "util/thread.h"
#include "util/numeric.h"
#include "irrlichttypes_extrabloated.h"
#include "debug.h"
#include "main.h" // for g_settings
#include "filesys.h"
#include "settings.h"
#include "mesh.h"
#include "log.h"
#include "gamedef.h"
#include "strfnd.h"
#include "util/string.h" // for parseColorString()

#ifdef __ANDROID__
#include <GLES/gl.h>
#endif

/*
	A cache from texture name to texture path
*/
MutexedMap<std::string, std::string> g_texturename_to_path_cache;

/*
	Replaces the filename extension.
	eg:
		std::string image = "a/image.png"
		replace_ext(image, "jpg")
		-> image = "a/image.jpg"
	Returns true on success.
*/
static bool replace_ext(std::string &path, const char *ext)
{
	if (ext == NULL)
		return false;
	// Find place of last dot, fail if \ or / found.
	s32 last_dot_i = -1;
	for (s32 i=path.size()-1; i>=0; i--)
	{
		if (path[i] == '.')
		{
			last_dot_i = i;
			break;
		}

		if (path[i] == '\\' || path[i] == '/')
			break;
	}
	// If not found, return an empty string
	if (last_dot_i == -1)
		return false;
	// Else make the new path
	path = path.substr(0, last_dot_i+1) + ext;
	return true;
}

/*
	Find out the full path of an image by trying different filename
	extensions.

	If failed, return "".
*/
std::string getImagePath(std::string path)
{
	// A NULL-ended list of possible image extensions
	const char *extensions[] = {
		"png", "jpg", "bmp", "tga",
		"pcx", "ppm", "psd", "wal", "rgb",
		NULL
	};
	// If there is no extension, add one
	if (removeStringEnd(path, extensions) == "")
		path = path + ".png";
	// Check paths until something is found to exist
	const char **ext = extensions;
	do{
		bool r = replace_ext(path, *ext);
		if (r == false)
			return "";
		if (fs::PathExists(path))
			return path;
	}
	while((++ext) != NULL);

	return "";
}

/*
	Gets the path to a texture by first checking if the texture exists
	in texture_path and if not, using the data path.

	Checks all supported extensions by replacing the original extension.

	If not found, returns "".

	Utilizes a thread-safe cache.
*/
std::string getTexturePath(const std::string &filename)
{
	std::string fullpath = "";
	/*
		Check from cache
	*/
	bool incache = g_texturename_to_path_cache.get(filename, &fullpath);
	if (incache)
		return fullpath;

	/*
		Check from texture_path
	*/
	std::string texture_path = g_settings->get("texture_path");
	if (texture_path != "")
	{
		std::string testpath = texture_path + DIR_DELIM + filename;
		// Check all filename extensions. Returns "" if not found.
		fullpath = getImagePath(testpath);
	}

	/*
		Check from default data directory
	*/
	if (fullpath == "")
	{
		std::string base_path = porting::path_share + DIR_DELIM + "textures"
				+ DIR_DELIM + "base" + DIR_DELIM + "pack";
		std::string testpath = base_path + DIR_DELIM + filename;
		// Check all filename extensions. Returns "" if not found.
		fullpath = getImagePath(testpath);
	}

	// Add to cache (also an empty result is cached)
	g_texturename_to_path_cache.set(filename, fullpath);

	// Finally return it
	return fullpath;
}

void clearTextureNameCache()
{
	g_texturename_to_path_cache.clear();
}

/*
	Stores internal information about a texture.
*/

struct TextureInfo
{
	std::string name;
	video::ITexture *texture;

	TextureInfo(
			const std::string &name_,
			video::ITexture *texture_=NULL
		):
		name(name_),
		texture(texture_)
	{
	}
};

/*
	SourceImageCache: A cache used for storing source images.
*/

class SourceImageCache
{
public:
	~SourceImageCache() {
		for (std::map<std::string, video::IImage*>::iterator iter = m_images.begin();
				iter != m_images.end(); iter++) {
			iter->second->drop();
		}
		m_images.clear();
	}
	void insert(const std::string &name, video::IImage *img,
			bool prefer_local, video::IVideoDriver *driver)
	{
		assert(img); // Pre-condition
		// Remove old image
		std::map<std::string, video::IImage*>::iterator n;
		n = m_images.find(name);
		if (n != m_images.end()){
			if (n->second)
				n->second->drop();
		}

		video::IImage* toadd = img;
		bool need_to_grab = true;

		// Try to use local texture instead if asked to
		if (prefer_local){
			std::string path = getTexturePath(name);
			if (path != ""){
				video::IImage *img2 = driver->createImageFromFile(path.c_str());
				if (img2){
					toadd = img2;
					need_to_grab = false;
				}
			}
		}

		if (need_to_grab)
			toadd->grab();
		m_images[name] = toadd;
	}
	video::IImage* get(const std::string &name)
	{
		std::map<std::string, video::IImage*>::iterator n;
		n = m_images.find(name);
		if (n != m_images.end())
			return n->second;
		return NULL;
	}
	// Primarily fetches from cache, secondarily tries to read from filesystem
	video::IImage* getOrLoad(const std::string &name, IrrlichtDevice *device)
	{
		std::map<std::string, video::IImage*>::iterator n;
		n = m_images.find(name);
		if (n != m_images.end()){
			n->second->grab(); // Grab for caller
			return n->second;
		}
		video::IVideoDriver* driver = device->getVideoDriver();
		std::string path = getTexturePath(name);
		if (path == ""){
			infostream<<"SourceImageCache::getOrLoad(): No path found for \""
					<<name<<"\""<<std::endl;
			return NULL;
		}
		infostream<<"SourceImageCache::getOrLoad(): Loading path \""<<path
				<<"\""<<std::endl;
		video::IImage *img = driver->createImageFromFile(path.c_str());

		if (img){
			m_images[name] = img;
			img->grab(); // Grab for caller
		}
		return img;
	}
private:
	std::map<std::string, video::IImage*> m_images;
};

/*
	TextureSource
*/

class TextureSource : public IWritableTextureSource
{
public:
	TextureSource(IrrlichtDevice *device);
	virtual ~TextureSource();

	/*
		Example case:
		Now, assume a texture with the id 1 exists, and has the name
		"stone.png^mineral1".
		Then a random thread calls getTextureId for a texture called
		"stone.png^mineral1^crack0".
		...Now, WTF should happen? Well:
		- getTextureId strips off stuff recursively from the end until
		  the remaining part is found, or nothing is left when
		  something is stripped out

		But it is slow to search for textures by names and modify them
		like that?
		- ContentFeatures is made to contain ids for the basic plain
		  textures
		- Crack textures can be slow by themselves, but the framework
		  must be fast.

		Example case #2:
		- Assume a texture with the id 1 exists, and has the name
		  "stone.png^mineral_coal.png".
		- Now getNodeTile() stumbles upon a node which uses
		  texture id 1, and determines that MATERIAL_FLAG_CRACK
		  must be applied to the tile
		- MapBlockMesh::animate() finds the MATERIAL_FLAG_CRACK and
		  has received the current crack level 0 from the client. It
		  finds out the name of the texture with getTextureName(1),
		  appends "^crack0" to it and gets a new texture id with
		  getTextureId("stone.png^mineral_coal.png^crack0").

	*/

	/*
		Gets a texture id from cache or
		- if main thread, generates the texture, adds to cache and returns id.
		- if other thread, adds to request queue and waits for main thread.

		The id 0 points to a NULL texture. It is returned in case of error.
	*/
	u32 getTextureId(const std::string &name);

	// Finds out the name of a cached texture.
	std::string getTextureName(u32 id);

	/*
		If texture specified by the name pointed by the id doesn't
		exist, create it, then return the cached texture.

		Can be called from any thread. If called from some other thread
		and not found in cache, the call is queued to the main thread
		for processing.
	*/
	video::ITexture* getTexture(u32 id);

	video::ITexture* getTexture(const std::string &name, u32 *id);

	// Returns a pointer to the irrlicht device
	virtual IrrlichtDevice* getDevice()
	{
		return m_device;
	}

	bool isKnownSourceImage(const std::string &name)
	{
		bool is_known = false;
		bool cache_found = m_source_image_existence.get(name, &is_known);
		if (cache_found)
			return is_known;
		// Not found in cache; find out if a local file exists
		is_known = (getTexturePath(name) != "");
		m_source_image_existence.set(name, is_known);
		return is_known;
	}

	// Processes queued texture requests from other threads.
	// Shall be called from the main thread.
	void processQueue();

	// Insert an image into the cache without touching the filesystem.
	// Shall be called from the main thread.
	void insertSourceImage(const std::string &name, video::IImage *img);

	// Rebuild images and textures from the current set of source images
	// Shall be called from the main thread.
	void rebuildImagesAndTextures();

	// Render a mesh to a texture.
	// Returns NULL if render-to-texture failed.
	// Shall be called from the main thread.
	video::ITexture* generateTextureFromMesh(
			const TextureFromMeshParams &params);

	// Generates an image from a full string like
	// "stone.png^mineral_coal.png^[crack:1:0".
	// Shall be called from the main thread.
	video::IImage* generateImage(const std::string &name);

	video::ITexture* getNormalTexture(const std::string &name);
private:

	// The id of the thread that is allowed to use irrlicht directly
	threadid_t m_main_thread;
	// The irrlicht device
	IrrlichtDevice *m_device;

	// Cache of source images
	// This should be only accessed from the main thread
	SourceImageCache m_sourcecache;

	// Generate a texture
	u32 generateTexture(const std::string &name);

	// Generate image based on a string like "stone.png" or "[crack:1:0".
	// if baseimg is NULL, it is created. Otherwise stuff is made on it.
	bool generateImagePart(std::string part_of_name, video::IImage *& baseimg);

	// Thread-safe cache of what source images are known (true = known)
	MutexedMap<std::string, bool> m_source_image_existence;

	// A texture id is index in this array.
	// The first position contains a NULL texture.
	std::vector<TextureInfo> m_textureinfo_cache;
	// Maps a texture name to an index in the former.
	std::map<std::string, u32> m_name_to_id;
	// The two former containers are behind this mutex
	JMutex m_textureinfo_cache_mutex;

	// Queued texture fetches (to be processed by the main thread)
	RequestQueue<std::string, u32, u8, u8> m_get_texture_queue;

	// Textures that have been overwritten with other ones
	// but can't be deleted because the ITexture* might still be used
	std::vector<video::ITexture*> m_texture_trash;

	// Cached settings needed for making textures from meshes
	bool m_setting_trilinear_filter;
	bool m_setting_bilinear_filter;
	bool m_setting_anisotropic_filter;
};

IWritableTextureSource* createTextureSource(IrrlichtDevice *device)
{
	return new TextureSource(device);
}

TextureSource::TextureSource(IrrlichtDevice *device):
		m_device(device)
{
	assert(m_device); // Pre-condition

	m_main_thread = get_current_thread_id();

	// Add a NULL TextureInfo as the first index, named ""
	m_textureinfo_cache.push_back(TextureInfo(""));
	m_name_to_id[""] = 0;

	// Cache some settings
	// Note: Since this is only done once, the game must be restarted
	// for these settings to take effect
	m_setting_trilinear_filter = g_settings->getBool("trilinear_filter");
	m_setting_bilinear_filter = g_settings->getBool("bilinear_filter");
	m_setting_anisotropic_filter = g_settings->getBool("anisotropic_filter");
}

TextureSource::~TextureSource()
{
	video::IVideoDriver* driver = m_device->getVideoDriver();

	unsigned int textures_before = driver->getTextureCount();

	for (std::vector<TextureInfo>::iterator iter =
			m_textureinfo_cache.begin();
			iter != m_textureinfo_cache.end(); iter++)
	{
		//cleanup texture
		if (iter->texture)
			driver->removeTexture(iter->texture);
	}
	m_textureinfo_cache.clear();

	for (std::vector<video::ITexture*>::iterator iter =
			m_texture_trash.begin(); iter != m_texture_trash.end();
			iter++) {
		video::ITexture *t = *iter;

		//cleanup trashed texture
		driver->removeTexture(t);
	}

	infostream << "~TextureSource() "<< textures_before << "/"
			<< driver->getTextureCount() << std::endl;
}

u32 TextureSource::getTextureId(const std::string &name)
{
	//infostream<<"getTextureId(): \""<<name<<"\""<<std::endl;

	{
		/*
			See if texture already exists
		*/
		JMutexAutoLock lock(m_textureinfo_cache_mutex);
		std::map<std::string, u32>::iterator n;
		n = m_name_to_id.find(name);
		if (n != m_name_to_id.end())
		{
			return n->second;
		}
	}

	/*
		Get texture
	*/
	if (get_current_thread_id() == m_main_thread)
	{
		return generateTexture(name);
	}
	else
	{
		infostream<<"getTextureId(): Queued: name=\""<<name<<"\""<<std::endl;

		// We're gonna ask the result to be put into here
		static ResultQueue<std::string, u32, u8, u8> result_queue;

		// Throw a request in
		m_get_texture_queue.add(name, 0, 0, &result_queue);

		/*infostream<<"Waiting for texture from main thread, name=\""
				<<name<<"\""<<std::endl;*/

		try
		{
			while(true) {
				// Wait result for a second
				GetResult<std::string, u32, u8, u8>
					result = result_queue.pop_front(1000);

				if (result.key == name) {
					return result.item;
				}
			}
		}
		catch(ItemNotFoundException &e)
		{
			errorstream<<"Waiting for texture " << name << " timed out."<<std::endl;
			return 0;
		}
	}

	infostream<<"getTextureId(): Failed"<<std::endl;

	return 0;
}

// Draw an image on top of an another one, using the alpha channel of the
// source image
static void blit_with_alpha(video::IImage *src, video::IImage *dst,
		v2s32 src_pos, v2s32 dst_pos, v2u32 size);

// Like blit_with_alpha, but only modifies destination pixels that
// are fully opaque
static void blit_with_alpha_overlay(video::IImage *src, video::IImage *dst,
		v2s32 src_pos, v2s32 dst_pos, v2u32 size);

// Like blit_with_alpha overlay, but uses an int to calculate the ratio
// and modifies any destination pixels that are not fully transparent
static void blit_with_interpolate_overlay(video::IImage *src, video::IImage *dst,
		v2s32 src_pos, v2s32 dst_pos, v2u32 size, int ratio);

// Apply a mask to an image
static void apply_mask(video::IImage *mask, video::IImage *dst,
		v2s32 mask_pos, v2s32 dst_pos, v2u32 size);

// Draw or overlay a crack
static void draw_crack(video::IImage *crack, video::IImage *dst,
		bool use_overlay, s32 frame_count, s32 progression,
		video::IVideoDriver *driver);

// Brighten image
void brighten(video::IImage *image);
// Parse a transform name
u32 parseImageTransform(const std::string& s);
// Apply transform to image dimension
core::dimension2d<u32> imageTransformDimension(u32 transform, core::dimension2d<u32> dim);
// Apply transform to image data
void imageTransform(u32 transform, video::IImage *src, video::IImage *dst);

/*
	This method generates all the textures
*/
u32 TextureSource::generateTexture(const std::string &name)
{
	//infostream << "generateTexture(): name=\"" << name << "\"" << std::endl;

	// Empty name means texture 0
	if (name == "") {
		infostream<<"generateTexture(): name is empty"<<std::endl;
		return 0;
	}

	{
		/*
			See if texture already exists
		*/
		JMutexAutoLock lock(m_textureinfo_cache_mutex);
		std::map<std::string, u32>::iterator n;
		n = m_name_to_id.find(name);
		if (n != m_name_to_id.end()) {
			return n->second;
		}
	}

	/*
		Calling only allowed from main thread
	*/
	if (get_current_thread_id() != m_main_thread) {
		errorstream<<"TextureSource::generateTexture() "
				"called not from main thread"<<std::endl;
		return 0;
	}

	video::IVideoDriver *driver = m_device->getVideoDriver();
	sanity_check(driver);

	video::IImage *img = generateImage(name);

	video::ITexture *tex = NULL;

	if (img != NULL) {
#ifdef __ANDROID__
		img = Align2Npot2(img, driver);
#endif
		// Create texture from resulting image
		tex = driver->addTexture(name.c_str(), img);
		img->drop();
	}

	/*
		Add texture to caches (add NULL textures too)
	*/

	JMutexAutoLock lock(m_textureinfo_cache_mutex);

	u32 id = m_textureinfo_cache.size();
	TextureInfo ti(name, tex);
	m_textureinfo_cache.push_back(ti);
	m_name_to_id[name] = id;

	return id;
}

std::string TextureSource::getTextureName(u32 id)
{
	JMutexAutoLock lock(m_textureinfo_cache_mutex);

	if (id >= m_textureinfo_cache.size())
	{
		errorstream<<"TextureSource::getTextureName(): id="<<id
				<<" >= m_textureinfo_cache.size()="
				<<m_textureinfo_cache.size()<<std::endl;
		return "";
	}

	return m_textureinfo_cache[id].name;
}

video::ITexture* TextureSource::getTexture(u32 id)
{
	JMutexAutoLock lock(m_textureinfo_cache_mutex);

	if (id >= m_textureinfo_cache.size())
		return NULL;

	return m_textureinfo_cache[id].texture;
}

video::ITexture* TextureSource::getTexture(const std::string &name, u32 *id)
{
	u32 actual_id = getTextureId(name);
	if (id){
		*id = actual_id;
	}
	return getTexture(actual_id);
}

void TextureSource::processQueue()
{
	/*
		Fetch textures
	*/
	//NOTE this is only thread safe for ONE consumer thread!
	if (!m_get_texture_queue.empty())
	{
		GetRequest<std::string, u32, u8, u8>
				request = m_get_texture_queue.pop();

		/*infostream<<"TextureSource::processQueue(): "
				<<"got texture request with "
				<<"name=\""<<request.key<<"\""
				<<std::endl;*/

		m_get_texture_queue.pushResult(request, generateTexture(request.key));
	}
}

void TextureSource::insertSourceImage(const std::string &name, video::IImage *img)
{
	//infostream<<"TextureSource::insertSourceImage(): name="<<name<<std::endl;

	sanity_check(get_current_thread_id() == m_main_thread);

	m_sourcecache.insert(name, img, true, m_device->getVideoDriver());
	m_source_image_existence.set(name, true);
}

void TextureSource::rebuildImagesAndTextures()
{
	JMutexAutoLock lock(m_textureinfo_cache_mutex);

	video::IVideoDriver* driver = m_device->getVideoDriver();
	sanity_check(driver);

	// Recreate textures
	for (u32 i=0; i<m_textureinfo_cache.size(); i++){
		TextureInfo *ti = &m_textureinfo_cache[i];
		video::IImage *img = generateImage(ti->name);
#ifdef __ANDROID__
		img = Align2Npot2(img, driver);
		sanity_check(img->getDimension().Height == npot2(img->getDimension().Height));
		sanity_check(img->getDimension().Width == npot2(img->getDimension().Width));
#endif
		// Create texture from resulting image
		video::ITexture *t = NULL;
		if (img) {
			t = driver->addTexture(ti->name.c_str(), img);
			img->drop();
		}
		video::ITexture *t_old = ti->texture;
		// Replace texture
		ti->texture = t;

		if (t_old)
			m_texture_trash.push_back(t_old);
	}
}

video::ITexture* TextureSource::generateTextureFromMesh(
		const TextureFromMeshParams &params)
{
	video::IVideoDriver *driver = m_device->getVideoDriver();
	sanity_check(driver);

#ifdef __ANDROID__
	const GLubyte* renderstr = glGetString(GL_RENDERER);
	std::string renderer((char*) renderstr);

	// use no render to texture hack
	if (
		(renderer.find("Adreno") != std::string::npos) ||
		(renderer.find("Mali") != std::string::npos) ||
		(renderer.find("Immersion") != std::string::npos) ||
		(renderer.find("Tegra") != std::string::npos) ||
		g_settings->getBool("inventory_image_hack")
		) {
		// Get a scene manager
		scene::ISceneManager *smgr_main = m_device->getSceneManager();
		sanity_check(smgr_main);
		scene::ISceneManager *smgr = smgr_main->createNewSceneManager();
		sanity_check(smgr);

		const float scaling = 0.2;

		scene::IMeshSceneNode* meshnode =
				smgr->addMeshSceneNode(params.mesh, NULL,
						-1, v3f(0,0,0), v3f(0,0,0),
						v3f(1.0 * scaling,1.0 * scaling,1.0 * scaling), true);
		meshnode->setMaterialFlag(video::EMF_LIGHTING, true);
		meshnode->setMaterialFlag(video::EMF_ANTI_ALIASING, true);
		meshnode->setMaterialFlag(video::EMF_TRILINEAR_FILTER, m_setting_trilinear_filter);
		meshnode->setMaterialFlag(video::EMF_BILINEAR_FILTER, m_setting_bilinear_filter);
		meshnode->setMaterialFlag(video::EMF_ANISOTROPIC_FILTER, m_setting_anisotropic_filter);

		scene::ICameraSceneNode* camera = smgr->addCameraSceneNode(0,
				params.camera_position, params.camera_lookat);
		// second parameter of setProjectionMatrix (isOrthogonal) is ignored
		camera->setProjectionMatrix(params.camera_projection_matrix, false);

		smgr->setAmbientLight(params.ambient_light);
		smgr->addLightSceneNode(0,
				params.light_position,
				params.light_color,
				params.light_radius*scaling);

		core::dimension2d<u32> screen = driver->getScreenSize();

		// Render scene
		driver->beginScene(true, true, video::SColor(0,0,0,0));
		driver->clearZBuffer();
		smgr->drawAll();

		core::dimension2d<u32> partsize(screen.Width * scaling,screen.Height * scaling);

		irr::video::IImage* rawImage =
				driver->createImage(irr::video::ECF_A8R8G8B8, partsize);

		u8* pixels = static_cast<u8*>(rawImage->lock());
		if (!pixels)
		{
			rawImage->drop();
			return NULL;
		}

		core::rect<s32> source(
				screen.Width /2 - (screen.Width  * (scaling / 2)),
				screen.Height/2 - (screen.Height * (scaling / 2)),
				screen.Width /2 + (screen.Width  * (scaling / 2)),
				screen.Height/2 + (screen.Height * (scaling / 2))
			);

		glReadPixels(source.UpperLeftCorner.X, source.UpperLeftCorner.Y,
				partsize.Width, partsize.Height, GL_RGBA,
				GL_UNSIGNED_BYTE, pixels);

		driver->endScene();

		// Drop scene manager
		smgr->drop();

		unsigned int pixelcount = partsize.Width*partsize.Height;

		u8* runptr = pixels;
		for (unsigned int i=0; i < pixelcount; i++) {

			u8 B = *runptr;
			u8 G = *(runptr+1);
			u8 R = *(runptr+2);
			u8 A = *(runptr+3);

			//BGRA -> RGBA
			*runptr = R;
			runptr ++;
			*runptr = G;
			runptr ++;
			*runptr = B;
			runptr ++;
			*runptr = A;
			runptr ++;
		}

		video::IImage* inventory_image =
				driver->createImage(irr::video::ECF_A8R8G8B8, params.dim);

		rawImage->copyToScaling(inventory_image);
		rawImage->drop();

		video::ITexture *rtt = driver->addTexture(params.rtt_texture_name.c_str(), inventory_image);
		inventory_image->drop();

		if (rtt == NULL) {
			errorstream << "TextureSource::generateTextureFromMesh(): failed to recreate texture from image: " << params.rtt_texture_name << std::endl;
			return NULL;
		}

		driver->makeColorKeyTexture(rtt, v2s32(0,0));

		if (params.delete_texture_on_shutdown)
			m_texture_trash.push_back(rtt);

		return rtt;
	}
#endif

	if (driver->queryFeature(video::EVDF_RENDER_TO_TARGET) == false)
	{
		static bool warned = false;
		if (!warned)
		{
			errorstream<<"TextureSource::generateTextureFromMesh(): "
				<<"EVDF_RENDER_TO_TARGET not supported."<<std::endl;
			warned = true;
		}
		return NULL;
	}

	// Create render target texture
	video::ITexture *rtt = driver->addRenderTargetTexture(
			params.dim, params.rtt_texture_name.c_str(),
			video::ECF_A8R8G8B8);
	if (rtt == NULL)
	{
		errorstream<<"TextureSource::generateTextureFromMesh(): "
			<<"addRenderTargetTexture returned NULL."<<std::endl;
		return NULL;
	}

	// Set render target
	if (!driver->setRenderTarget(rtt, false, true, video::SColor(0,0,0,0))) {
		driver->removeTexture(rtt);
		errorstream<<"TextureSource::generateTextureFromMesh(): "
			<<"failed to set render target"<<std::endl;
		return NULL;
	}

	// Get a scene manager
	scene::ISceneManager *smgr_main = m_device->getSceneManager();
	assert(smgr_main);
	scene::ISceneManager *smgr = smgr_main->createNewSceneManager();
	assert(smgr);

	scene::IMeshSceneNode* meshnode =
			smgr->addMeshSceneNode(params.mesh, NULL,
					-1, v3f(0,0,0), v3f(0,0,0), v3f(1,1,1), true);
	meshnode->setMaterialFlag(video::EMF_LIGHTING, true);
	meshnode->setMaterialFlag(video::EMF_ANTI_ALIASING, true);
	meshnode->setMaterialFlag(video::EMF_TRILINEAR_FILTER, m_setting_trilinear_filter);
	meshnode->setMaterialFlag(video::EMF_BILINEAR_FILTER, m_setting_bilinear_filter);
	meshnode->setMaterialFlag(video::EMF_ANISOTROPIC_FILTER, m_setting_anisotropic_filter);

	scene::ICameraSceneNode* camera = smgr->addCameraSceneNode(0,
			params.camera_position, params.camera_lookat);
	// second parameter of setProjectionMatrix (isOrthogonal) is ignored
	camera->setProjectionMatrix(params.camera_projection_matrix, false);

	smgr->setAmbientLight(params.ambient_light);
	smgr->addLightSceneNode(0,
			params.light_position,
			params.light_color,
			params.light_radius);

	// Render scene
	driver->beginScene(true, true, video::SColor(0,0,0,0));
	smgr->drawAll();
	driver->endScene();

	// Drop scene manager
	smgr->drop();

	// Unset render target
	driver->setRenderTarget(0, false, true, 0);

	if (params.delete_texture_on_shutdown)
		m_texture_trash.push_back(rtt);

	return rtt;
}

video::IImage* TextureSource::generateImage(const std::string &name)
{
	/*
		Get the base image
	*/

	const char separator = '^';
	const char paren_open = '(';
	const char paren_close = ')';

	// Find last separator in the name
	s32 last_separator_pos = -1;
	u8 paren_bal = 0;
	for (s32 i = name.size() - 1; i >= 0; i--) {
		switch(name[i]) {
		case separator:
			if (paren_bal == 0) {
				last_separator_pos = i;
				i = -1; // break out of loop
			}
			break;
		case paren_open:
			if (paren_bal == 0) {
				errorstream << "generateImage(): unbalanced parentheses"
						<< "(extranous '(') while generating texture \""
						<< name << "\"" << std::endl;
				return NULL;
			}
			paren_bal--;
			break;
		case paren_close:
			paren_bal++;
			break;
		default:
			break;
		}
	}
	if (paren_bal > 0) {
		errorstream << "generateImage(): unbalanced parentheses"
				<< "(missing matching '(') while generating texture \""
				<< name << "\"" << std::endl;
		return NULL;
	}


	video::IImage *baseimg = NULL;

	/*
		If separator was found, make the base image
		using a recursive call.
	*/
	if (last_separator_pos != -1) {
		baseimg = generateImage(name.substr(0, last_separator_pos));
	}


	video::IVideoDriver* driver = m_device->getVideoDriver();
	sanity_check(driver);

	/*
		Parse out the last part of the name of the image and act
		according to it
	*/

	std::string last_part_of_name = name.substr(last_separator_pos + 1);

	/* 
		If this name is enclosed in parentheses, generate it
		and blit it onto the base image
	*/
	if (last_part_of_name[0] == paren_open
			&& last_part_of_name[last_part_of_name.size() - 1] == paren_close) {
		std::string name2 = last_part_of_name.substr(1,
				last_part_of_name.size() - 2);
		video::IImage *tmp = generateImage(name2);
		if (!tmp) {
			errorstream << "generateImage(): "
				"Failed to generate \"" << name2 << "\""
				<< std::endl;
			return NULL;
		}
		core::dimension2d<u32> dim = tmp->getDimension();
		if (!baseimg)
			baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
		blit_with_alpha(tmp, baseimg, v2s32(0, 0), v2s32(0, 0), dim);
		tmp->drop();
	} else if (!generateImagePart(last_part_of_name, baseimg)) {
		// Generate image according to part of name
		errorstream << "generateImage(): "
				"Failed to generate \"" << last_part_of_name << "\""
				<< std::endl;
	}

	// If no resulting image, print a warning
	if (baseimg == NULL) {
		errorstream << "generateImage(): baseimg is NULL (attempted to"
				" create texture \"" << name << "\")" << std::endl;
	}

	return baseimg;
}

#ifdef __ANDROID__
#include <GLES/gl.h>
/**
 * Check and align image to npot2 if required by hardware
 * @param image image to check for npot2 alignment
 * @param driver driver to use for image operations
 * @return image or copy of image aligned to npot2
 */
video::IImage * Align2Npot2(video::IImage * image,
		video::IVideoDriver* driver)
{
	if (image == NULL) {
		return image;
	}

	core::dimension2d<u32> dim = image->getDimension();

	std::string extensions = (char*) glGetString(GL_EXTENSIONS);
	if (extensions.find("GL_OES_texture_npot") != std::string::npos) {
		return image;
	}

	unsigned int height = npot2(dim.Height);
	unsigned int width  = npot2(dim.Width);

	if ((dim.Height == height) &&
			(dim.Width == width)) {
		return image;
	}

	if (dim.Height > height) {
		height *= 2;
	}

	if (dim.Width > width) {
		width *= 2;
	}

	video::IImage *targetimage =
			driver->createImage(video::ECF_A8R8G8B8,
					core::dimension2d<u32>(width, height));

	if (targetimage != NULL) {
		image->copyToScaling(targetimage);
	}
	image->drop();
	return targetimage;
}

#endif

bool TextureSource::generateImagePart(std::string part_of_name,
		video::IImage *& baseimg)
{
	video::IVideoDriver* driver = m_device->getVideoDriver();
	sanity_check(driver);

	// Stuff starting with [ are special commands
	if (part_of_name.size() == 0 || part_of_name[0] != '[')
	{
		video::IImage *image = m_sourcecache.getOrLoad(part_of_name, m_device);
#ifdef __ANDROID__
		image = Align2Npot2(image, driver);
#endif
		if (image == NULL) {
			if (part_of_name != "") {
				if (part_of_name.find("_normal.png") == std::string::npos){
					errorstream<<"generateImage(): Could not load image \""
						<<part_of_name<<"\""<<" while building texture"<<std::endl;
					errorstream<<"generateImage(): Creating a dummy"
						<<" image for \""<<part_of_name<<"\""<<std::endl;
				} else {
					infostream<<"generateImage(): Could not load normal map \""
						<<part_of_name<<"\""<<std::endl;
					infostream<<"generateImage(): Creating a dummy"
						<<" normal map for \""<<part_of_name<<"\""<<std::endl;
				}
			}

			// Just create a dummy image
			//core::dimension2d<u32> dim(2,2);
			core::dimension2d<u32> dim(1,1);
			image = driver->createImage(video::ECF_A8R8G8B8, dim);
			sanity_check(image != NULL);
			/*image->setPixel(0,0, video::SColor(255,255,0,0));
			image->setPixel(1,0, video::SColor(255,0,255,0));
			image->setPixel(0,1, video::SColor(255,0,0,255));
			image->setPixel(1,1, video::SColor(255,255,0,255));*/
			image->setPixel(0,0, video::SColor(255,myrand()%256,
					myrand()%256,myrand()%256));
			/*image->setPixel(1,0, video::SColor(255,myrand()%256,
					myrand()%256,myrand()%256));
			image->setPixel(0,1, video::SColor(255,myrand()%256,
					myrand()%256,myrand()%256));
			image->setPixel(1,1, video::SColor(255,myrand()%256,
					myrand()%256,myrand()%256));*/
		}

		// If base image is NULL, load as base.
		if (baseimg == NULL)
		{
			//infostream<<"Setting "<<part_of_name<<" as base"<<std::endl;
			/*
				Copy it this way to get an alpha channel.
				Otherwise images with alpha cannot be blitted on
				images that don't have alpha in the original file.
			*/
			core::dimension2d<u32> dim = image->getDimension();
			baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
			image->copyTo(baseimg);
		}
		// Else blit on base.
		else
		{
			//infostream<<"Blitting "<<part_of_name<<" on base"<<std::endl;
			// Size of the copied area
			core::dimension2d<u32> dim = image->getDimension();
			//core::dimension2d<u32> dim(16,16);
			// Position to copy the blitted to in the base image
			core::position2d<s32> pos_to(0,0);
			// Position to copy the blitted from in the blitted image
			core::position2d<s32> pos_from(0,0);
			// Blit
			/*image->copyToWithAlpha(baseimg, pos_to,
					core::rect<s32>(pos_from, dim),
					video::SColor(255,255,255,255),
					NULL);*/
			blit_with_alpha(image, baseimg, pos_from, pos_to, dim);
		}
		//cleanup
		image->drop();
	}
	else
	{
		// A special texture modification

		/*infostream<<"generateImage(): generating special "
				<<"modification \""<<part_of_name<<"\""
				<<std::endl;*/

		/*
			[crack:N:P
			[cracko:N:P
			Adds a cracking texture
			N = animation frame count, P = crack progression
		*/
		if (part_of_name.substr(0,6) == "[crack")
		{
			if (baseimg == NULL) {
				errorstream<<"generateImagePart(): baseimg == NULL "
						<<"for part_of_name=\""<<part_of_name
						<<"\", cancelling."<<std::endl;
				return false;
			}

			// Crack image number and overlay option
			bool use_overlay = (part_of_name[6] == 'o');
			Strfnd sf(part_of_name);
			sf.next(":");
			s32 frame_count = stoi(sf.next(":"));
			s32 progression = stoi(sf.next(":"));

			/*
				Load crack image.

				It is an image with a number of cracking stages
				horizontally tiled.
			*/
			video::IImage *img_crack = m_sourcecache.getOrLoad(
					"crack_anylength.png", m_device);

			if (img_crack && progression >= 0)
			{
				draw_crack(img_crack, baseimg,
						use_overlay, frame_count,
						progression, driver);
				img_crack->drop();
			}
		}
		/*
			[combine:WxH:X,Y=filename:X,Y=filename2
			Creates a bigger texture from an amount of smaller ones
		*/
		else if (part_of_name.substr(0,8) == "[combine")
		{
			Strfnd sf(part_of_name);
			sf.next(":");
			u32 w0 = stoi(sf.next("x"));
			u32 h0 = stoi(sf.next(":"));
			//infostream<<"combined w="<<w0<<" h="<<h0<<std::endl;
			core::dimension2d<u32> dim(w0,h0);
			if (baseimg == NULL) {
				baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
				baseimg->fill(video::SColor(0,0,0,0));
			}
			while (sf.atend() == false) {
				u32 x = stoi(sf.next(","));
				u32 y = stoi(sf.next("="));
				std::string filename = sf.next(":");
				infostream<<"Adding \""<<filename
						<<"\" to combined ("<<x<<","<<y<<")"
						<<std::endl;
				video::IImage *img = m_sourcecache.getOrLoad(filename, m_device);
				if (img) {
					core::dimension2d<u32> dim = img->getDimension();
					infostream<<"Size "<<dim.Width
							<<"x"<<dim.Height<<std::endl;
					core::position2d<s32> pos_base(x, y);
					video::IImage *img2 =
							driver->createImage(video::ECF_A8R8G8B8, dim);
					img->copyTo(img2);
					img->drop();
					/*img2->copyToWithAlpha(baseimg, pos_base,
							core::rect<s32>(v2s32(0,0), dim),
							video::SColor(255,255,255,255),
							NULL);*/
					blit_with_alpha(img2, baseimg, v2s32(0,0), pos_base, dim);
					img2->drop();
				} else {
					errorstream << "generateImagePart(): Failed to load image \""
						<< filename << "\" for [combine" << std::endl;
				}
			}
		}
		/*
			"[brighten"
		*/


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