From 0d8358d4e345d95a9aacf6e468c38b50eba95e34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miroslav=20Bend=C3=ADk?= <bendik@creanet.sk>
Date: Thu, 23 Aug 2012 14:21:34 +0200
Subject: [PATCH] Added generation of background.

---
 CMakeLists.txt    |  4 +++-
 TileGenerator.cpp | 26 +++++++++++++++++++++++---
 TileGenerator.h   |  4 ++++
 3 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d526723..9ae1def 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,8 @@ endif(CMAKE_COMPILER_IS_GNUCXX)
 
 
 find_package(PkgConfig)
+include(FindPackageHandleStandardArgs)
+
 pkg_check_modules(PC_LIBSQLITE QUIET sqlite3)
 set(LIBSQLITE3_DEFINITIONS ${PC_LIBSQLITE_CFLAGS_OTHER})
 
@@ -19,7 +21,6 @@ find_library(LIBSQLITE3_LIBRARY NAMES sqlite3 libsqlite3 HINTS ${PC_LIBSQLITE_LI
 set(LIBSQLITE3_LIBRARIES ${LIBSQLITE3_LIBRARY} )
 set(LIBSQLITE3_INCLUDE_DIRS ${LIBSQLITE3_INCLUDE_DIR} )
 
-include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(LibSqlite3  DEFAULT_MSG LIBSQLITE3_LIBRARY LIBSQLITE3_INCLUDE_DIR)
 
 mark_as_advanced(LIBSQLITE3_INCLUDE_DIR LIBSQLITE3_LIBRARY )
@@ -50,4 +51,5 @@ add_executable(minetest_mapper
 target_link_libraries(
 	minetest_mapper
 	${LIBSQLITE3_LIBRARIES}
+	gd
 )
diff --git a/TileGenerator.cpp b/TileGenerator.cpp
index d0cca87..8bca0b7 100644
--- a/TileGenerator.cpp
+++ b/TileGenerator.cpp
@@ -7,6 +7,7 @@
  * =====================================================================
  */
 
+#include <cstdio>
 #include <cstdlib>
 #include <fstream>
 #include <iostream>
@@ -24,6 +25,7 @@ TileGenerator::TileGenerator():
 	m_drawScale(false),
 	m_drawUnderground(false),
 	m_db(0),
+	m_image(0),
 	m_xMin(0),
 	m_xMax(0),
 	m_zMin(0),
@@ -112,10 +114,12 @@ void TileGenerator::parseColorsFile(const std::string &fileName)
 	}
 }
 
-void TileGenerator::generate(const std::string &input, const std::string &/*output*/)
+void TileGenerator::generate(const std::string &input, const std::string &output)
 {
 	openDb(input);
 	loadBlocks();
+	createImage();
+	writeImage(output);
 }
 
 void TileGenerator::openDb(const std::string &input)
@@ -157,8 +161,6 @@ void TileGenerator::loadBlocks()
 				break;
 			}
 		}
-		m_imgWidth = (m_xMax - m_xMin) * 16;
-		m_imgHeight = (m_zMax - m_zMin) * 16;
 	}
 	else {
 		throw DbError();
@@ -186,3 +188,21 @@ inline int TileGenerator::unsignedToSigned(long i, long max_positive)
 	}
 }
 
+void TileGenerator::createImage()
+{
+	m_imgWidth = (m_xMax - m_xMin) * 16;
+	m_imgHeight = (m_zMax - m_zMin) * 16;
+	m_image = gdImageCreate(m_imgWidth, m_imgHeight);
+	// Background
+	gdImageColorAllocate(m_image, 255, 255, 255);
+}
+
+void TileGenerator::writeImage(const std::string &output)
+{
+	FILE *out;
+	out = fopen(output.c_str(), "w");
+	gdImagePng(m_image, out);
+	fclose(out);
+	gdImageDestroy(m_image);
+}
+
diff --git a/TileGenerator.h b/TileGenerator.h
index 35338fc..8382148 100644
--- a/TileGenerator.h
+++ b/TileGenerator.h
@@ -10,6 +10,7 @@
 #ifndef TILEGENERATOR_H_JJNUCARH
 #define TILEGENERATOR_H_JJNUCARH
 
+#include <gd.h>
 #include <map>
 #include <sqlite3.h>
 #include <stdint.h>
@@ -54,6 +55,8 @@ private:
 	void loadBlocks();
 	BlockPos decodeBlockPos(sqlite3_int64 blockId);
 	int unsignedToSigned(long i, long max_positive);
+	void createImage();
+	void writeImage(const std::string &output);
 
 private:
 	std::string m_bgColor;
@@ -66,6 +69,7 @@ private:
 	bool m_drawUnderground;
 
 	sqlite3 *m_db;
+	gdImagePtr m_image;
 	int m_xMin;
 	int m_xMax;
 	int m_zMin;