Implemented shading.

CMakeLists.txt

@@ -35,11 +35,13 @@ include_directories(
 )
 
 set(mapper_HDRS
+	PixelAttributes.h
 	TileGenerator.h
 )
 
 set(mapper_SRCS
 	mapper.cpp
+	PixelAttributes.cpp
 	TileGenerator.cpp
 )
 

PixelAttributes.cpp

@@ -0,0 +1,29 @@
+/*
+ * =====================================================================
+ *        Version:  1.0
+ *        Created:  25.08.2012 10:55:27
+ *         Author:  Miroslav Bendík
+ *        Company:  LinuxOS.sk
+ * =====================================================================
+ */
+
+#include "PixelAttributes.h"
+
+
+PixelAttributes::PixelAttributes()
+{
+	m_blockPixelAttributes.resize(18); // 16px + 2px gradient calculation
+}
+
+void PixelAttributes::setWidth(int width)
+{
+	for (size_t i = 0; i < 18; ++i) {
+		m_blockPixelAttributes[i].resize(width + 2); // Width + 1 px gradient calculation on both sides
+	}
+}
+
+void PixelAttributes::scroll()
+{
+	m_blockPixelAttributes[17] = m_blockPixelAttributes[1];
+}
+

PixelAttributes.h

@@ -0,0 +1,33 @@
+/*
+ * =====================================================================
+ *        Version:  1.0
+ *        Created:  25.08.2012 10:55:29
+ *         Author:  Miroslav Bendík
+ *        Company:  LinuxOS.sk
+ * =====================================================================
+ */
+
+#ifndef PIXELATTRIBUTES_H_ADZ35GYF
+#define PIXELATTRIBUTES_H_ADZ35GYF
+
+#include <vector>
+
+struct PixelAttribute {
+	PixelAttribute(): height(0) {};
+	int height;
+};
+
+class PixelAttributes
+{
+public:
+	PixelAttributes();
+	void setWidth(int width);
+	void scroll();
+	inline PixelAttribute &attribute(int z, int x) { return m_blockPixelAttributes[z + 1][x + 1]; };
+
+private:
+	std::vector <std::vector <PixelAttribute> > m_blockPixelAttributes;
+};
+
+#endif /* end of include guard: PIXELATTRIBUTES_H_ADZ35GYF */
+

TileGenerator.cpp

@@ -12,7 +12,6 @@
 #include <fstream>
 #include <iostream>
 #include <sstream>
-#include <vector>
 #include <zlib.h>
 #include "TileGenerator.h"
 
@@ -101,6 +100,19 @@ static inline std::string zlibDecompress(const char *data, std::size_t size, std
 	return buffer;
 }
 
+static inline int colorSafeBounds(int color)
+{
+	if (color > 255) {
+		return 255;
+	}
+	else if (color < 0) {
+		return 0;
+	}
+	else {
+		return color;
+	}
+}
+
 TileGenerator::TileGenerator():
 	m_bgColor(255, 255, 255),
 	m_scaleColor(0, 0, 0),
@@ -288,11 +300,12 @@ inline BlockPos TileGenerator::decodeBlockPos(sqlite3_int64 blockId) const
 
 void TileGenerator::createImage()
 {
-	m_imgWidth = (m_xMax - m_xMin + 1) * 16;
-	m_imgHeight = (m_zMax - m_zMin + 1) * 16;
-	m_image = gdImageCreateTrueColor(m_imgWidth, m_imgHeight);
+	m_mapWidth = (m_xMax - m_xMin + 1) * 16;
+	m_mapHeight = (m_zMax - m_zMin + 1) * 16;
+	m_image = gdImageCreateTrueColor(m_mapWidth, m_mapHeight);
+	m_blockPixelAttributes.setWidth(m_mapWidth);
 	// Background
-	gdImageFilledRectangle(m_image, 0, 0, m_imgWidth - 1, m_imgHeight -1, rgb2int(m_bgColor.r, m_bgColor.g, m_bgColor.b));
+	gdImageFilledRectangle(m_image, 0, 0, m_mapWidth - 1, m_mapHeight -1, rgb2int(m_bgColor.r, m_bgColor.g, m_bgColor.b));
 }
 
 void TileGenerator::renderMap()
@@ -414,6 +427,7 @@ void TileGenerator::renderMap()
 				}
 			}
 		}
+		renderShading(zPos);
 	}
 }
 
@@ -423,7 +437,7 @@ inline void TileGenerator::renderMapBlock(const std::string &mapBlock, const Blo
 	int zBegin = (m_zMax - pos.z) * 16;
 	const unsigned char *mapData = reinterpret_cast<const unsigned char *>(mapBlock.c_str());
 	for (int z = 0; z < 16; ++z) {
-		int imageY = zBegin + 16 - z;
+		int imageY = zBegin + 15 - z;
 		for (int x = 0; x < 16; ++x) {
 			if (m_readedPixels[z] & (1 << x)) {
 				continue;
@@ -443,6 +457,7 @@ inline void TileGenerator::renderMapBlock(const std::string &mapBlock, const Blo
 						const Color &c = color->second;
 						m_image->tpixels[imageY][imageX] = rgb2int(c.r, c.g, c.b);
 						m_readedPixels[z] |= (1 << x);
+						m_blockPixelAttributes.attribute(15 - z, xBegin + x).height = pos.y * 16 + y;
 					}
 					break;
 				}
@@ -451,6 +466,35 @@ inline void TileGenerator::renderMapBlock(const std::string &mapBlock, const Blo
 	}
 }
 
+inline void TileGenerator::renderShading(int zPos)
+{
+	int zBegin = (m_zMax - zPos) * 16;
+	for (int z = 1; z < 17; ++z) {
+		int imageY = zBegin + z;
+		if (imageY >= m_mapHeight) {
+			continue;
+		}
+		for (int x = 0; x < m_mapWidth; ++x) {
+			int y = m_blockPixelAttributes.attribute(z, x).height;
+			int y1 = m_blockPixelAttributes.attribute(z, x - 1).height;
+			int y2 = m_blockPixelAttributes.attribute(z - 1, x).height;
+			int d = ((y - y1) + (y - y2)) * 12;
+			if (d > 36) {
+				d = 36;
+			}
+			int sourceColor = m_image->tpixels[imageY][x] & 0xffffff;
+			int r = (sourceColor & 0xff0000) >> 16;
+			int g = (sourceColor & 0x00ff00) >> 8;
+			int b = (sourceColor & 0x0000ff);
+			r = colorSafeBounds(r + d);
+			g = colorSafeBounds(g + d);
+			b = colorSafeBounds(b + d);
+			m_image->tpixels[imageY][x] = rgb2int(r, g, b);
+		}
+	}
+	m_blockPixelAttributes.scroll();
+}
+
 inline std::list<int> TileGenerator::getZValueList() const
 {
 	std::list<int> zlist;

TileGenerator.h

@@ -16,6 +16,7 @@
 #include <sqlite3.h>
 #include <stdint.h>
 #include <string>
+#include "PixelAttributes.h"
 
 struct Color {
 	Color(): r(255), g(255), b(255) {};
@@ -65,6 +66,7 @@ class DecompressError {
 class VersionError {
 };
 
+
 class TileGenerator
 {
 private:
@@ -95,6 +97,7 @@ private:
 	std::list<int> getZValueList() const;
 	std::map<int, BlockList> getBlocksOnZ(int zPos, sqlite3_stmt *statement) const;
 	void renderMapBlock(const std::string &mapBlock, const BlockPos &pos, int version);
+	void renderShading(int zPos);
 	void writeImage(const std::string &output);
 
 private:
@@ -109,12 +112,13 @@ private:
 
 	sqlite3 *m_db;
 	gdImagePtr m_image;
+	PixelAttributes m_blockPixelAttributes;
 	int m_xMin;
 	int m_xMax;
 	int m_zMin;
 	int m_zMax;
-	int m_imgWidth;
-	int m_imgHeight;
+	int m_mapWidth;
+	int m_mapHeight;
 	std::list<std::pair<int, int> > m_positions;
 	std::map<int, std::string> m_nameMap;
 	ColorMap m_colors;