OPENGL: Detect NPOT support for GLES.

For GLES1+ there exists GL_OES_texture_npot, which indicates that there is
NPOT support.

GLES2 always had (limited) NPOT support, which is all we require, thus we
always enable it.

1 files changed, 4 insertions, 1 deletions

diff --git a/backends/graphics/opengl/context.cpp b/backends/graphics/opengl/context.cpp
index 478d98c19a..c149b12f19 100644
--- a/backends/graphics/opengl/context.cpp
+++ b/backends/graphics/opengl/context.cpp
@@ -194,7 +194,7 @@ void OpenGLGraphicsManager::initializeGLContext() {
 	while (!tokenizer.empty()) {
 		Common::String token = tokenizer.nextToken();
 
-		if (token == "GL_ARB_texture_non_power_of_two") {
+		if (token == "GL_ARB_texture_non_power_of_two" || token == "GL_OES_texture_npot") {
 			g_context.NPOTSupported = true;
 		} else if (token == "GL_ARB_shader_objects") {
 			ARBShaderObjects = true;
@@ -214,6 +214,9 @@ void OpenGLGraphicsManager::initializeGLContext() {
 	}
 
 	if (g_context.type == kContextGLES2) {
+		// GLES2 always has (limited) NPOT support.
+		g_context.NPOTSupported = true;
+
 		// GLES2 always has shader support.
 		g_context.shadersSupported = true;