IOS: Add support for filtering feature

4 files changed, 10 insertions, 28 deletions

diff --git a/backends/platform/ios7/ios7_common.h b/backends/platform/ios7/ios7_common.h
index 12740d4ae9..3609387efd 100644
--- a/backends/platform/ios7/ios7_common.h
+++ b/backends/platform/ios7/ios7_common.h
@@ -62,7 +62,6 @@ enum UIViewTapDescription {
 };
 
 enum GraphicsModes {
-	kGraphicsModeLinear = 0,
 	kGraphicsModeNone = 1,
 
 	kGraphicsMode2xSaI,
@@ -80,7 +79,7 @@ struct VideoContext {
 	VideoContext() : asprectRatioCorrection(), screenWidth(), screenHeight(), overlayVisible(false),
 	                 overlayWidth(), overlayHeight(), mouseX(), mouseY(),
 	                 mouseHotspotX(), mouseHotspotY(), mouseWidth(), mouseHeight(),
-	                 mouseIsVisible(), graphicsMode(kGraphicsModeNone), shakeOffsetY() {
+	                 mouseIsVisible(), graphicsMode(kGraphicsModeNone), filtering(false), shakeOffsetY() {
 	}
 
 	// Game screen state
@@ -102,6 +101,7 @@ struct VideoContext {
 
 	// Misc state
 	GraphicsModes graphicsMode;
+	bool filtering;
 	int shakeOffsetY;
 };
 
diff --git a/backends/platform/ios7/ios7_osys_main.cpp b/backends/platform/ios7/ios7_osys_main.cpp
index 25d9cbed15..3a627478f9 100644
--- a/backends/platform/ios7/ios7_osys_main.cpp
+++ b/backends/platform/ios7/ios7_osys_main.cpp
@@ -52,8 +52,7 @@
 
 
 const OSystem::GraphicsMode OSystem_iOS7::s_supportedGraphicsModes[] = {
-	{ "none", "No filtering", kGraphicsModeNone },
-	{ "linear", "Linear filtering", kGraphicsModeLinear },
+	{ "none", "Normal", kGraphicsModeNone },
 
 #ifdef ENABLE_IOS7_SCALERS
 #ifdef USE_SCALERS
@@ -171,6 +170,7 @@ void OSystem_iOS7::initBackend() {
 bool OSystem_iOS7::hasFeature(Feature f) {
 	switch (f) {
 	case kFeatureCursorPalette:
+	case kFeatureFilteringMode:
 		return true;
 
 	default:
@@ -187,6 +187,9 @@ void OSystem_iOS7::setFeatureState(Feature f, bool enable) {
 			_mouseCursorPaletteEnabled = enable;
 		}
 		break;
+	case kFeatureFilteringMode:
+		_videoContext->filtering = enable;
+		break;
 	case kFeatureAspectRatioCorrection:
 		_videoContext->asprectRatioCorrection = enable;
 		break;
@@ -200,6 +203,8 @@ bool OSystem_iOS7::getFeatureState(Feature f) {
 	switch (f) {
 	case kFeatureCursorPalette:
 		return _mouseCursorPaletteEnabled;
+	case kFeatureFilteringMode:
+		return _videoContext->filtering;
 	case kFeatureAspectRatioCorrection:
 		return _videoContext->asprectRatioCorrection;
 
diff --git a/backends/platform/ios7/ios7_osys_video.mm b/backends/platform/ios7/ios7_osys_video.mm
index 6784cf46f5..456796137e 100644
--- a/backends/platform/ios7/ios7_osys_video.mm
+++ b/backends/platform/ios7/ios7_osys_video.mm
@@ -76,7 +76,6 @@ int OSystem_iOS7::getDefaultGraphicsMode() const {
 bool OSystem_iOS7::setGraphicsMode(int mode) {
 	switch (mode) {
 	case kGraphicsModeNone:
-	case kGraphicsModeLinear:
 	case kGraphicsMode2xSaI:
 	case kGraphicsModeSuper2xSaI:
 	case kGraphicsModeSuperEagle:
diff --git a/backends/platform/ios7/ios7_video.mm b/backends/platform/ios7/ios7_video.mm
index 8dbfb71b74..5baa83e8e8 100644
--- a/backends/platform/ios7/ios7_video.mm
+++ b/backends/platform/ios7/ios7_video.mm
@@ -442,26 +442,7 @@ uint getSizeNextPOT(uint size) {
 	glActiveTexture(GL_TEXTURE0);
 	glBindTexture(GL_TEXTURE_2D, tex); printOpenGLError();
 
-	GLint filter = GL_LINEAR;
-
-	switch (_videoContext.graphicsMode) {
-	case kGraphicsModeNone:
-		filter = GL_NEAREST;
-		break;
-
-	case kGraphicsModeLinear:
-	case kGraphicsMode2xSaI:
-	case kGraphicsModeSuper2xSaI:
-	case kGraphicsModeSuperEagle:
-	case kGraphicsModeAdvMame2x:
-	case kGraphicsModeAdvMame3x:
-	case kGraphicsModeHQ2x:
-	case kGraphicsModeHQ3x:
-	case kGraphicsModeTV2x:
-	case kGraphicsModeDotMatrix:
-		filter = GL_LINEAR;
-		break;
-	}
+	GLint filter = _videoContext.filtering ? GL_LINEAR : GL_NEAREST;
 
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter); printOpenGLError();
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter); printOpenGLError();
@@ -478,9 +459,6 @@ uint getSizeNextPOT(uint size) {
 	int scalerScale = 1;
 
 	switch (_videoContext.graphicsMode) {
-	case kGraphicsModeLinear:
-		break;
-
 	case kGraphicsModeNone:
 		break;
 #ifdef USE_SCALERS