renderer: add r_imageFitScreen cvar

DaemonEngine · May 29, 2024 · c567434 · c567434
1 parent 00a5a8f
commit c567434
Show file tree

Hide file tree

Showing 4 changed files with 19 additions and 3 deletions.
diff --git a/src/engine/renderer/InternalImage.cpp b/src/engine/renderer/InternalImage.cpp
@@ -110,7 +110,7 @@ int R_GetImageCustomScalingStep( const image_t *image, const imageParams_t &imag
 
 	int scalingStep = 0;
 
-	// Scale down the image size until it's not smaller than screen.
+	// Scale down the image size according to the screen size.
 	if ( image->bits & IF_FITSCREEN )
 	{
 		int largerSide = std::max( glConfig.vidWidth, glConfig.vidHeight );
@@ -123,8 +123,13 @@ int R_GetImageCustomScalingStep( const image_t *image, const imageParams_t &imag
 				scalingStep++;
 			}
 
-			// We need the larger image size before it becomes smaller than screen.
-			if ( scaledDimension != largerSide )
+			/* With r_imageFitScreen == 1, we need the larger image size before
+			it becomes smaller than screen.
+
+			With r_imageFitScreen == 2 the image is never larger than screen, as
+			we allow the larger size that is not larger than screen, it can be the
+			larger size smaller than screen. */
+			if ( scaledDimension != largerSide && r_imageFitScreen.Get() != 2 )
 			{
 				scaledDimension <<= 1;
 				scalingStep--;

diff --git a/src/engine/renderer/tr_image.cpp b/src/engine/renderer/tr_image.cpp
@@ -763,6 +763,14 @@ void R_UploadImage( const byte **dataArray, int numLayers, int numMips, image_t
 
 	int scaledWidth = image->width;
 	int scaledHeight = image->height;
+
+	// If r_imageFitScreen is disabled, use nopicmip instead.
+	if ( ( image->bits & IF_FITSCREEN ) && !r_imageFitScreen.Get() )
+	{
+		image->bits &= ~IF_FITSCREEN;
+		image->bits |= IF_NOPICMIP;
+	}
+
 	int customScalingStep = R_GetImageCustomScalingStep( image, imageParams );
 	R_DownscaleImageDimensions( customScalingStep, &scaledWidth, &scaledHeight, &dataArray, numLayers, &numMips );
 

diff --git a/src/engine/renderer/tr_init.cpp b/src/engine/renderer/tr_init.cpp
@@ -150,6 +150,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 	cvar_t      *r_ignoreMaterialMinDimension;
 	cvar_t      *r_ignoreMaterialMaxDimension;
 	cvar_t      *r_replaceMaterialMinDimensionIfPresentWithMaxDimension;
+	Cvar::Range<Cvar::Cvar<int>> r_imageFitScreen("r_imageFitScreen", "downscale “fitscreen” images according to screen size: 0: do not downscale, 1: downscale as much as possible without being smaller than screen size, 2: downscale to never be larger then screen size", Cvar::NONE, 1, 0, 2);
 	cvar_t      *r_finish;
 	cvar_t      *r_clear;
 	cvar_t      *r_textureMode;
@@ -1095,6 +1096,7 @@ ScreenshotCmd screenshotPNGRegistration("screenshotPNG", ssFormat_t::SSF_PNG, "p
 		r_ignoreMaterialMaxDimension = Cvar_Get( "r_ignoreMaterialMaxDimension", "0",  CVAR_LATCH | CVAR_ARCHIVE );
 		r_replaceMaterialMinDimensionIfPresentWithMaxDimension
 			= Cvar_Get( "r_replaceMaterialMinDimensionIfPresentWithMaxDimension", "0",  CVAR_LATCH | CVAR_ARCHIVE );
+		Cvar::Latch(r_imageFitScreen);
 		r_colorbits = Cvar_Get( "r_colorbits", "0",  CVAR_LATCH );
 		r_mode = Cvar_Get( "r_mode", "-2", CVAR_LATCH | CVAR_ARCHIVE );
 		r_customwidth = Cvar_Get( "r_customwidth", "1600", CVAR_LATCH | CVAR_ARCHIVE );

diff --git a/src/engine/renderer/tr_local.h b/src/engine/renderer/tr_local.h
@@ -2911,6 +2911,7 @@ enum class dynamicLightRenderer_t { LEGACY, TILED };
 	extern cvar_t *r_ignoreMaterialMinDimension;
 	extern cvar_t *r_ignoreMaterialMaxDimension;
 	extern cvar_t *r_replaceMaterialMinDimensionIfPresentWithMaxDimension;
+	extern Cvar::Range<Cvar::Cvar<int>> r_imageFitScreen;
 	extern cvar_t *r_finish;
 	extern cvar_t *r_drawBuffer;
 	extern cvar_t *r_textureMode;