SDL: Add a function to convert from SDL_PixelFormat to Graphics::PixelFormat

2 files changed, 17 insertions, 21 deletions

diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
index dd334f3814..37965d057e 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
@@ -493,6 +493,14 @@ static void maskToBitCount(Uint32 mask, uint8 &numBits, uint8 &shift) {
 }
 #endif
 
+Graphics::PixelFormat SurfaceSdlGraphicsManager::convertSDLPixelFormat(SDL_PixelFormat *in) const {
+	return Graphics::PixelFormat(in->BytesPerPixel,
+		8 - in->Rloss, 8 - in->Gloss,
+		8 - in->Bloss, 8 - in->Aloss,
+		in->Rshift, in->Gshift,
+		in->Bshift, in->Ashift);
+}
+
 void SurfaceSdlGraphicsManager::detectSupportedFormats() {
 	_supportedFormats.clear();
 
@@ -570,11 +578,7 @@ void SurfaceSdlGraphicsManager::detectSupportedFormats() {
 
 	if (_hwScreen) {
 		// Get our currently set hardware format
-		Graphics::PixelFormat hwFormat(_hwScreen->format->BytesPerPixel,
-			8 - _hwScreen->format->Rloss, 8 - _hwScreen->format->Gloss,
-			8 - _hwScreen->format->Bloss, 8 - _hwScreen->format->Aloss,
-			_hwScreen->format->Rshift, _hwScreen->format->Gshift,
-			_hwScreen->format->Bshift, _hwScreen->format->Ashift);
+		Graphics::PixelFormat hwFormat = convertSDLPixelFormat(_hwScreen->format);
 
 		// Workaround to SDL not providing an accurate Aloss value on Mac OS X.
 		if (_hwScreen->format->Amask == 0)
@@ -1041,17 +1045,7 @@ bool SurfaceSdlGraphicsManager::loadGFXMode() {
 	if (_overlayscreen == NULL)
 		error("allocating _overlayscreen failed");
 
-	_overlayFormat.bytesPerPixel = _overlayscreen->format->BytesPerPixel;
-
-	_overlayFormat.rLoss = _overlayscreen->format->Rloss;
-	_overlayFormat.gLoss = _overlayscreen->format->Gloss;
-	_overlayFormat.bLoss = _overlayscreen->format->Bloss;
-	_overlayFormat.aLoss = _overlayscreen->format->Aloss;
-
-	_overlayFormat.rShift = _overlayscreen->format->Rshift;
-	_overlayFormat.gShift = _overlayscreen->format->Gshift;
-	_overlayFormat.bShift = _overlayscreen->format->Bshift;
-	_overlayFormat.aShift = _overlayscreen->format->Ashift;
+	_overlayFormat = convertSDLPixelFormat(_overlayscreen->format);
 
 	_tmpscreen2 = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.overlayWidth + 3, _videoMode.overlayHeight + 3,
 						16,
@@ -2362,11 +2356,7 @@ void SurfaceSdlGraphicsManager::displayMessageOnOSD(const char *msg) {
 
 	Graphics::Surface dst;
 	dst.init(_osdMessageSurface->w, _osdMessageSurface->h, _osdMessageSurface->pitch, _osdMessageSurface->pixels,
-		Graphics::PixelFormat(_osdMessageSurface->format->BytesPerPixel,
-			8 - _osdMessageSurface->format->Rloss, 8 - _osdMessageSurface->format->Gloss,
-			8 - _osdMessageSurface->format->Bloss, 8 - _osdMessageSurface->format->Aloss,
-			_osdMessageSurface->format->Rshift, _osdMessageSurface->format->Gshift,
-			_osdMessageSurface->format->Bshift, _osdMessageSurface->format->Ashift));
+		convertSDLPixelFormat(_osdMessageSurface->format));
 
 	// Render the message, centered, and in white
 	for (i = 0; i < lines.size(); i++) {
diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.h b/backends/graphics/surfacesdl/surfacesdl-graphics.h
index 3866bc3810..3315533d80 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.h
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.h
@@ -118,6 +118,12 @@ protected:
 	virtual void setPalette(const byte *colors, uint start, uint num) override;
 	virtual void grabPalette(byte *colors, uint start, uint num) const override;
 
+	/**
+	 * Convert from the SDL pixel format to Graphics::PixelFormat
+	 * @param in    The SDL pixel format to convert
+	 * @param out   A pixel format to be written to
+	 */
+	Graphics::PixelFormat convertSDLPixelFormat(SDL_PixelFormat *in) const;
 public:
 	virtual void copyRectToScreen(const void *buf, int pitch, int x, int y, int w, int h) override;
 	virtual Graphics::Surface *lockScreen() override;