Added a preprocessor definition to disable the use of stb_image + Added CMakeLists

CMakeLists.txt

@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.8)
+
+add_definitions(-DFONS_USE_FREETYPE)
+add_definitions(-DNVG_NO_STB)
+
+add_library (
+	nanovg
+	src/nanovg.c
+)
+
+include_directories(../freetype/include)
+
+target_link_libraries(
+	nanovg 
+	PUBLIC
+	freetype
+)
+
+target_include_directories (nanovg PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src)

src/nanovg.c

@@ -24,8 +24,11 @@
 #include "nanovg.h"
 #define FONTSTASH_IMPLEMENTATION
 #include "fontstash.h"
+
+#ifndef NVG_NO_STB
 #define STB_IMAGE_IMPLEMENTATION
 #include "stb_image.h"
+#endif 
 
 #ifdef _MSC_VER
 #pragma warning(disable: 4100)  // unreferenced formal parameter
@@ -788,6 +791,7 @@ void nvgFillPaint(NVGcontext* ctx, NVGpaint paint)
 	nvgTransformMultiply(state->fill.xform, state->xform);
 }
 
+#ifndef NVG_NO_STB
 int nvgCreateImage(NVGcontext* ctx, const char* filename, int imageFlags)
 {
 	int w, h, n, image;
@@ -816,6 +820,7 @@ int nvgCreateImageMem(NVGcontext* ctx, int imageFlags, unsigned char* data, int
 	stbi_image_free(img);
 	return image;
 }
+#endif
 
 int nvgCreateImageRGBA(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data)
 {