Toggle GL2, GL3, and GLES2 with macros

src/gui.cpp

@@ -8,11 +8,13 @@
 
 #include "../ext/osdialog/osdialog.h"
 
-#define NANOVG_GL2_IMPLEMENTATION
-// #define NANOVG_GL3_IMPLEMENTATION
+#define NANOVG_GL2 1
+// #define NANOVG_GL3 1
+// #define NANOVG_GLES2 1
+#define NANOVG_GL_IMPLEMENTATION 1
 #include "../ext/nanovg/src/nanovg_gl.h"
 // Hack to get framebuffer objects working on OpenGL 2 (we blindly assume the extension is supported)
-#define NANOVG_FBO_VALID 1
+// #define NANOVG_FBO_VALID 1
 #include "../ext/nanovg/src/nanovg_gl_utils.h"
 #define BLENDISH_IMPLEMENTATION
 #include "../ext/oui-blendish/blendish.h"
@@ -353,11 +355,22 @@ void guiInit() {
 	glfwSetWindowSizeLimits(gWindow, 640, 480, GLFW_DONT_CARE, GLFW_DONT_CARE);
 
 	// Set up NanoVG
+#if defined NANOVG_GL2
 	gVg = nvgCreateGL2(NVG_ANTIALIAS);
-	// gVg = nvgCreateGL3(NVG_ANTIALIAS);
+#elif defined NANOVG_GL3
+	gVg = nvgCreateGL3(NVG_ANTIALIAS);
+#elif defined NANOVG_GLES2
+	gVg = nvgCreateGLES2(NVG_ANTIALIAS);
+#endif
 	assert(gVg);
 
+#if defined NANOVG_GL2
 	gFramebufferVg = nvgCreateGL2(NVG_ANTIALIAS);
+#elif defined NANOVG_GL3
+	gFramebufferVg = nvgCreateGL3(NVG_ANTIALIAS);
+#elif defined NANOVG_GLES2
+	gFramebufferVg = nvgCreateGLES2(NVG_ANTIALIAS);
+#endif
 	assert(gFramebufferVg);
 
 	// Set up Blendish
@@ -375,9 +388,23 @@ void guiInit() {
 
 void guiDestroy() {
 	gGuiFont.reset();
+
+#if defined NANOVG_GL2
 	nvgDeleteGL2(gVg);
-	// nvgDeleteGL3(gVg);
+#elif defined NANOVG_GL3
+	nvgDeleteGL3(gVg);
+#elif defined NANOVG_GLES2
+	nvgDeleteGLES2(gVg);
+#endif
+
+#if defined NANOVG_GL2
 	nvgDeleteGL2(gFramebufferVg);
+#elif defined NANOVG_GL3
+	nvgDeleteGL3(gFramebufferVg);
+#elif defined NANOVG_GLES2
+	nvgDeleteGLES2(gFramebufferVg);
+#endif
+
 	glfwDestroyWindow(gWindow);
 	glfwTerminate();
 }