Use Irrlicht functions to query npot texture support

src/CMakeLists.txt

@@ -102,11 +102,11 @@ endif()
 option(ENABLE_GLES "Use OpenGL ES instead of OpenGL" FALSE)
 mark_as_advanced(ENABLE_GLES)
 if(BUILD_CLIENT)
+	# transitive dependency from Irrlicht (see longer explanation below)
+	if(NOT WIN32)
 		if(ENABLE_GLES)
 			find_package(OpenGLES2 REQUIRED)
 		else()
-		# transitive dependency from Irrlicht (see longer explanation below)
-		if(NOT WIN32)
 			set(OPENGL_GL_PREFERENCE "LEGACY" CACHE STRING
 				"See CMake Policy CMP0072 for reference. GLVND is broken on some nvidia setups")
 			set(OpenGL_GL_PREFERENCE ${OPENGL_GL_PREFERENCE})
@@ -523,10 +523,6 @@ include_directories(
 	${PROJECT_SOURCE_DIR}/script
 )
 
-if(ENABLE_GLES)
-	include_directories(${OPENGLES2_INCLUDE_DIR} ${EGL_INCLUDE_DIR})
-endif()
-
 if(USE_GETTEXT)
 	include_directories(${GETTEXT_INCLUDE_DIR})
 endif()

src/client/guiscalingfilter.cpp

@@ -23,7 +23,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "util/numeric.h"
 #include <cstdio>
 #include "client/renderingengine.h"
-#include "client/tile.h" // hasNPotSupport()
 
 /* Maintain a static cache to store the images that correspond to textures
  * in a format that's manipulable by code.  Some platforms exhibit issues
@@ -117,7 +116,7 @@ video::ITexture *guiScalingResizeCached(video::IVideoDriver *driver,
 #if ENABLE_GLES
 	// Some platforms are picky about textures being powers of 2, so expand
 	// the image dimensions to the next power of 2, if necessary.
-	if (!hasNPotSupport()) {
+	if (!driver->queryFeature(video::EVDF_TEXTURE_NPOT)) {
 		video::IImage *po2img = driver->createImage(src->getColorFormat(),
 				core::dimension2d<u32>(npot2((u32)destrect.getWidth()),
 				npot2((u32)destrect.getHeight())));

src/client/tile.cpp

@@ -34,15 +34,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "guiscalingfilter.h"
 #include "renderingengine.h"
 
-
-#if ENABLE_GLES
-#ifdef _IRR_COMPILE_WITH_OGLES1_
-#include <GLES/gl.h>
-#else
-#include <GLES2/gl2.h>
-#endif
-#endif
-
 /*
 	A cache from texture name to texture path
 */
@@ -1013,42 +1004,19 @@ video::IImage* TextureSource::generateImage(const std::string &name)
 
 #if ENABLE_GLES
 
-
-static inline u16 get_GL_major_version()
-{
-	const GLubyte *gl_version = glGetString(GL_VERSION);
-	return (u16) (gl_version[0] - '0');
-}
-
-/**
- * Check if hardware requires npot2 aligned textures
- * @return true if alignment NOT(!) requires, false otherwise
- */
-
-bool hasNPotSupport()
-{
-	// Only GLES2 is trusted to correctly report npot support
-	// Note: we cache the boolean result, the GL context will never change.
-	static const bool supported = get_GL_major_version() > 1 &&
-		glGetString(GL_EXTENSIONS) &&
-		strstr((char *)glGetString(GL_EXTENSIONS), "GL_OES_texture_npot");
-	return supported;
-}
-
 /**
  * Check and align image to npot2 if required by hardware
  * @param image image to check for npot2 alignment
  * @param driver driver to use for image operations
  * @return image or copy of image aligned to npot2
  */
-
 video::IImage *Align2Npot2(video::IImage *image,
 		video::IVideoDriver *driver)
 {
 	if (image == NULL)
 		return image;
 
-	if (hasNPotSupport())
+	if (driver->queryFeature(video::EVDF_TEXTURE_NPOT))
 		return image;
 
 	core::dimension2d<u32> dim = image->getDimension();

src/client/tile.h

@@ -134,8 +134,7 @@ public:
 IWritableTextureSource *createTextureSource();
 
 #if ENABLE_GLES
-bool hasNPotSupport();
+video::IImage *Align2Npot2(video::IImage *image, video::IVideoDriver *driver);
-video::IImage * Align2Npot2(video::IImage * image, irr::video::IVideoDriver* driver);
 #endif
 
 enum MaterialType{