Merge pull request #303 from cbeck88/troubleshooting_travis

SDL RW Ops (master, new)

.travis.yml

@@ -31,6 +31,7 @@ before_install:
     - if [ "$CXX" = "g++" ]; then time sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y; fi
 
 install:
+    - sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu/ saucy main universe"
     - time sudo apt-get update -qq
     - time sudo apt-get install -qq libboost-filesystem-dev libboost-iostreams-dev libboost-program-options-dev libboost-regex-dev libboost-system-dev libboost-test-dev libcairo2-dev libfribidi-dev libpango1.0-dev libsdl-image1.2-dev libsdl-mixer1.2-dev libsdl-net1.2-dev libsdl-ttf2.0-dev gdb
     - if [ "$CXX" = "g++" ]; then time sudo apt-get -qq install g++-4.8; fi

CMakeLists.txt

@@ -547,7 +547,7 @@ if(ENABLE_TOOLS OR ENABLE_GAME OR ENABLE_TESTS)
 	find_package( SDL_image 1.2 REQUIRED )
 endif(ENABLE_TOOLS OR ENABLE_GAME OR ENABLE_TESTS)
 if(ENABLE_GAME OR ENABLE_TESTS)
-	find_package( SDL_mixer 1.2 REQUIRED )
+	find_package( SDL_mixer 1.2.12 REQUIRED )
 	find_package( SDL_ttf 2.0.8 REQUIRED )
 
 	if(NOT MSVC)

SConstruct

@@ -357,7 +357,7 @@ if env["prereqs"]:
             return \
                 conf.CheckSDL(require_version = '1.2.0') & \
                 conf.CheckSDL("SDL_ttf", require_version = "2.0.8") & \
-                conf.CheckSDL("SDL_mixer", require_version = '1.2.0') & \
+                conf.CheckSDL("SDL_mixer", require_version = '1.2.12') & \
                 conf.CheckSDL("SDL_image", require_version = '1.2.0')
 
     have_server_prereqs = (\

src/filesystem.hpp

@@ -30,8 +30,13 @@
 
 class config;
 
+//TODO: will this compile for msvc <= 2010 which has a bug when it comes to forward declaring return values?
+struct SDL_RWops;
+
 namespace filesystem {
 	
+SDL_RWops* load_RWops(const std::string &path);
+
 /** An exception object used when an IO error occurs */
 struct io_exception : public game::error {
 	io_exception() : game::error("") {}

src/filesystem_common.cpp

@@ -13,8 +13,11 @@
 #include "serialization/unicode.hpp"
 #include "util.hpp"
 
+#include <SDL_rwops.h>
+
 static lg::log_domain log_filesystem("filesystem");
 #define LOG_FS LOG_STREAM(info, log_filesystem)
+#define ERR_FS LOG_STREAM(err, log_filesystem)
 
 namespace filesystem {
 
@@ -198,4 +201,90 @@ const file_tree_checksum& data_tree_checksum(bool reset)
 	return checksum;
 }
 
+
+static int SDLCALL ifs_seek(struct SDL_RWops *context, int offset, int whence);
+static int SDLCALL ifs_read(struct SDL_RWops *context, void *ptr, int size, int maxnum);
+static int SDLCALL ifs_write(struct SDL_RWops *context, const void *ptr, int size, int num);
+static int SDLCALL ifs_close(struct SDL_RWops *context);
+
+SDL_RWops* load_RWops(const std::string &path) {
+	SDL_RWops *rw = SDL_AllocRW();
+
+	rw->seek = &ifs_seek;
+	rw->read = &ifs_read;
+	rw->write = &ifs_write;
+	rw->close = &ifs_close;
+
+	rw->type = 7; // Random number that is larger than 5
+
+	std::istream *ifs = istream_file(path);
+	if(!ifs) {
+		ERR_FS << "load_RWops: istream_file returned NULL on " << path << '\n';
+		return NULL;
+	}
+
+	rw->hidden.unknown.data1 = ifs;
+
+	return rw;
+}
+
+static int SDLCALL ifs_seek(struct SDL_RWops *context, int offset, int whence) {
+	std::ios_base::seekdir seekdir;
+	switch(whence){
+	case RW_SEEK_SET:
+		seekdir = std::ios_base::beg;
+		if(offset < 0)
+			offset = 0;
+		break;
+	case RW_SEEK_CUR:
+		seekdir = std::ios_base::cur;
+		break;
+	case RW_SEEK_END:
+		seekdir = std::ios_base::end;
+		if(offset > 0)
+			offset = 0;
+		break;
+	default:
+		assert(false);
+	}
+	std::istream *ifs = static_cast<std::istream*>(context->hidden.unknown.data1);
+	const std::ios_base::iostate saved_state = ifs->rdstate();
+
+	ifs->seekg(offset, seekdir);
+
+	if(saved_state != ifs->rdstate() && offset < 0) {
+		ifs->clear(saved_state);
+		ifs->seekg(0, std::ios_base::beg);
+	}
+
+	std::streamsize pos = ifs->tellg();
+	return static_cast<int>(pos);
+}
+static int SDLCALL ifs_read(struct SDL_RWops *context, void *ptr, int size, int maxnum) {
+	std::istream *ifs = static_cast<std::istream*>(context->hidden.unknown.data1);
+
+	// This seems overly simplistic, but it's the same as mem_read's implementation
+	ifs->read(static_cast<char*>(ptr), maxnum * size);
+	std::streamsize num = ifs->good() ? maxnum : ifs->gcount() / size;
+
+	// EOF sticks unless we clear it. Bad is an actual I/O error
+	if(!ifs->bad())
+		ifs->clear();
+
+	return static_cast<int>(num);
+}
+static int SDLCALL ifs_write(struct SDL_RWops * /*context*/, const void * /*ptr*/, int /*size*/, int /*num*/) {
+	SDL_SetError("Writing not implemented");
+	return 0;
+}
+static int SDLCALL ifs_close(struct SDL_RWops *context) {
+	if (context) {
+		std::istream *ifs = static_cast<std::istream*>(context->hidden.unknown.data1);
+		delete ifs;
+		SDL_FreeRW(context);
+	}
+	return 0;
+}
+
+
 }

src/font.cpp

@@ -228,7 +228,8 @@ static TTF_Font* open_font(const std::string& fname, int size)
 		}
 	}
 
-	TTF_Font* font = TTF_OpenFont(name.c_str(),size);
+	SDL_RWops *rwops = filesystem::load_RWops(name);
+	TTF_Font* font = TTF_OpenFontRW(rwops, true, size); // SDL takes ownership of rwops
 	if(font == NULL) {
 		ERR_FT << "Failed opening font: TTF_OpenFont: " << TTF_GetError() << std::endl;
 		return NULL;

src/image.cpp

@@ -450,7 +450,8 @@ static std::string get_localized_path (const std::string& file, const std::strin
 // Load overlay image and compose it with the original surface.
 static void add_localized_overlay (const std::string& ovr_file, surface &orig_surf)
 {
-	surface ovr_surf = IMG_Load(ovr_file.c_str());
+	SDL_RWops *rwops = filesystem::load_RWops(ovr_file);
+	surface ovr_surf = IMG_Load_RW(rwops, true); // SDL takes ownership of rwops
 	if (ovr_surf.null()) {
 		return;
 	}
@@ -476,7 +477,8 @@ static surface load_image_file(const image::locator &loc)
 			if (!loc_location.empty()) {
 				location = loc_location;
 			}
-			res = IMG_Load(location.c_str());
+			SDL_RWops *rwops = filesystem::load_RWops(location);
+			res = IMG_Load_RW(rwops, true); // SDL takes ownership of rwops
 			// If there was no standalone localized image, check if there is an overlay.
 			if (!res.null() && loc_location.empty()) {
 				const std::string ovr_location = get_localized_path(location, "--overlay");

src/sound.cpp

@@ -499,7 +499,8 @@ static void play_new_music()
 	std::map<std::string,Mix_Music*>::const_iterator itor = music_cache.find(filename);
 	if(itor == music_cache.end()) {
 		LOG_AUDIO << "attempting to insert track '" << filename << "' into cache\n";
-		Mix_Music* const music = Mix_LoadMUS(filename.c_str());
+		SDL_RWops *rwops = filesystem::load_RWops(filename);
+		Mix_Music* const music = Mix_LoadMUSType_RW(rwops, MUS_NONE, true); // SDL takes ownership of rwops
 		if(music == NULL) {
 			ERR_AUDIO << "Could not load music file '" << filename << "': "
 					  << Mix_GetError() << "\n";
@@ -721,7 +722,8 @@ static Mix_Chunk* load_chunk(const std::string& file, channel_group group)
 		std::string const &filename = filesystem::get_binary_file_location("sounds", file);
 
 		if (!filename.empty()) {
-			temp_chunk.set_data(Mix_LoadWAV(filename.c_str()));
+			SDL_RWops *rwops = filesystem::load_RWops(filename);
+			temp_chunk.set_data(Mix_LoadWAV_RW(rwops, true)); // SDL takes ownership of rwops
 		} else {
 			ERR_AUDIO << "Could not load sound file '" << file << "'." << std::endl;
 			throw chunk_load_exception();