From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 4 Jul 2018 20:49:06 +0000 (+0300)
Subject: Allow RED and RG pixel formats in RenderTargetFormat
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=c44c350892a4955c7457abe1cbb81bbf0a22a86c;hp=11520b2b95f4242b3ca4d2d3d14a0f2b5c1623f1

Allow RED and RG pixel formats in RenderTargetFormat
---

diff --git a/source/rendertarget.cpp b/source/rendertarget.cpp
index c651e665..239180f5 100644
--- a/source/rendertarget.cpp
+++ b/source/rendertarget.cpp
@@ -46,7 +46,7 @@ RenderTargetFormat RenderTargetFormat::operator,(PixelFormat f) const
 	}
 	else
 	{
-		if(unsized!=RGB && unsized!=RGBA)
+		if(unsized!=RED && unsized!=RG && unsized!=RGB && unsized!=RGBA)
 			throw invalid_argument("RenderTargetformat::operator,");
 		if(size>3)
 			--size;
@@ -72,7 +72,6 @@ int RenderTargetFormat::index(RenderOutput o) const
 
 PixelFormat get_output_pixelformat(unsigned char o)
 {
-	unsigned ncomp = (o&3)+1;
 	unsigned size = ((o>>2)&3);
 	PixelFormat base;
 	if(get_output_type(o)>=get_output_type(RENDER_DEPTH))
@@ -83,7 +82,8 @@ PixelFormat get_output_pixelformat(unsigned char o)
 	}
 	else
 	{
-		base = (ncomp==4 ? RGBA : RGB);
+		static PixelFormat base_formats[4] = { RED, RG, RGB, RGBA };
+		base = base_formats[o&3];
 		if(size==3)
 			++size;
 	}