Initial work on using FreeImage

CMakeLists.txt

@@ -45,15 +45,15 @@ if(NOT CUSTOM_DOCDIR STREQUAL "")
 endif()
 
 
-# Libraries: gd
+# Libraries: freeimage
 
-find_library(LIBGD_LIBRARY gd)
-find_path(LIBGD_INCLUDE_DIR gd.h)
-message (STATUS "libgd library: ${LIBGD_LIBRARY}")
-message (STATUS "libgd headers: ${LIBGD_INCLUDE_DIR}")
-if(NOT LIBGD_LIBRARY OR NOT LIBGD_INCLUDE_DIR)
-	message(FATAL_ERROR "libgd not found!")
-endif(NOT LIBGD_LIBRARY OR NOT LIBGD_INCLUDE_DIR)
+find_library(FREEIMAGE_LIBRARY freeimage)
+find_path(FREEIMAGE_INCLUDE_DIR FreeImage.h)
+message (STATUS "FreeImage library: ${FREEIMAGE_LIBRARY}")
+message (STATUS "FreeImage headers: ${FREEIMAGE_INCLUDE_DIR}")
+if(NOT FREEIMAGE_LIBRARY OR NOT FREEIMAGE_INCLUDE_DIR)
+	message(FATAL_ERROR "FreeImage not found!")
+endif(NOT FREEIMAGE_LIBRARY OR NOT FREEIMAGE_INCLUDE_DIR)
 
 # Libraries: zlib
 
@@ -127,7 +127,7 @@ include_directories(
 	"${CMAKE_CURRENT_SOURCE_DIR}"
 	"${CMAKE_CURRENT_BINARY_DIR}"
 	${SQLITE3_INCLUDE_DIR}
-	${LIBGD_INCLUDE_DIR}
+	${FREEIMAGE_INCLUDE_DIR}
 	${ZLIB_INCLUDE_DIR}
 )
 
@@ -165,7 +165,7 @@ target_link_libraries(
 	${SQLITE3_LIBRARY}
 	${LEVELDB_LIBRARY}
 	${REDIS_LIBRARY}
-	${LIBGD_LIBRARY}
+	${FREEIMAGE_LIBRARY}
 	${ZLIB_LIBRARY}
 )
 

Image.cpp

@@ -4,8 +4,6 @@
 #include <iostream>
 #include <sstream>
 #include <stdexcept>
-#include <gd.h>
-#include <gdfontmb.h>
 
 #include "Image.h"
 
@@ -22,40 +20,41 @@
 
 // ARGB but with inverted alpha
 
-static inline int color2int(Color c)
+static inline RGBQUAD color2rgbquad(Color c)
 {
-	u8 a = 255 - c.a;
-	return (a << 24) | (c.r << 16) | (c.g << 8) | c.b;
+	RGBQUAD c2;
+	c2.rgbRed = c.r;
+	c2.rgbGreen = c.g;
+	c2.rgbBlue = c.b;
+	return c2;
 }
 
-static inline Color int2color(int c)
+static inline Color rgbquad2color(RGBQUAD c)
 {
-	Color c2;
-	u8 a;
-	c2.b = c & 0xff;
-	c2.g = (c >> 8) & 0xff;
-	c2.r = (c >> 16) & 0xff;
-	a = (c >> 24) & 0xff;
-	c2.a = 255 - a;
-	return c2;
+	return Color(c.rgbRed, c.rgbGreen, c.rgbBlue);
 }
 
 
 Image::Image(int width, int height) :
 	m_width(width), m_height(height), m_image(NULL)
 {
-	m_image = gdImageCreateTrueColor(m_width, m_height);
+	// FIXME: This works because minetestmapper only creates one image
+	FreeImage_Initialise();
+	printf("Using FreeImage v%s\n", FreeImage_GetVersion());
+
+	m_image = FreeImage_Allocate(width, height, 24);
 }
 
 Image::~Image()
 {
-	gdImageDestroy(m_image);
+	FreeImage_Unload(m_image);
 }
 
 void Image::setPixel(int x, int y, const Color &c)
 {
 	SIZECHECK(x, y);
-	m_image->tpixels[y][x] = color2int(c);
+	RGBQUAD col = color2rgbquad(c);
+	FreeImage_SetPixelColor(m_image, x, y, &col);
 }
 
 Color Image::getPixel(int x, int y)
@@ -64,43 +63,41 @@ Color Image::getPixel(int x, int y)
 	if(x < 0 || x > m_width || y < 0 || y > m_height)
 		throw std::out_of_range("sizecheck");
 #endif
-	return int2color(m_image->tpixels[y][x]);
+	RGBQUAD c;
+	FreeImage_GetPixelColor(m_image, x, y, &c);
+	return rgbquad2color(c);
 }
 
 void Image::drawLine(int x1, int y1, int x2, int y2, const Color &c)
 {
 	SIZECHECK(x1, y1);
 	SIZECHECK(x2, y2);
-	gdImageLine(m_image, x1, y1, x2, y2, color2int(c));
+	// TODO
 }
 
 void Image::drawText(int x, int y, const std::string &s, const Color &c)
 {
 	SIZECHECK(x, y);
-	gdImageString(m_image, gdFontGetMediumBold(), x, y, (unsigned char*) s.c_str(), color2int(c));
+	// TODO
 }
 
 void Image::drawFilledRect(int x, int y, int w, int h, const Color &c)
 {
 	SIZECHECK(x, y);
 	SIZECHECK(x + w - 1, y + h - 1);
-	gdImageFilledRectangle(m_image, x, y, x + w - 1, y + h - 1, color2int(c));
+	RGBQUAD col = color2rgbquad(c);
+	for(int xx = 0; xx < w; xx++)
+		for(int yy = 0; yy < h; yy++)
+			FreeImage_SetPixelColor(m_image, x + xx, y + yy, &col);
 }
 
 void Image::drawCircle(int x, int y, int diameter, const Color &c)
 {
 	SIZECHECK(x, y);
-	gdImageArc(m_image, x, y, diameter, diameter, 0, 360, color2int(c));
+	// TODO
 }
 
 void Image::save(const std::string &filename)
 {
-	FILE *f = fopen(filename.c_str(), "wb");
-	if(!f) {
-		std::ostringstream oss;
-		oss << "Error writing image file: " << std::strerror(errno);
-		throw std::runtime_error(oss.str());
-	}
-	gdImagePng(m_image, f); // other formats?
-	fclose(f);
+	FreeImage_Save(FIF_PNG, m_image, filename.c_str()); // other formats?
 }

Image.h

@@ -3,7 +3,7 @@
 
 #include "types.h"
 #include <string>
-#include <gd.h>
+#include <FreeImage.h>
 
 struct Color {
 	Color() : r(0), g(0), b(0), a(0) {};
@@ -29,7 +29,7 @@ private:
 	Image(const Image&);
 
 	int m_width, m_height;
-	gdImagePtr m_image;
+	FIBITMAP *m_image;
 };
 
 #endif // IMAGE_HEADER

README.rst

@@ -10,7 +10,7 @@ This version is both faster and provides more features than the now deprecated P
 Requirements
 ------------
 
-* libgd
+* FreeImage
 * sqlite3
 * leveldb (optional, set ENABLE_LEVELDB=1 in CMake to enable leveldb support)
 * hiredis (optional, set ENABLE_REDIS=1 in CMake to enable redis support)