X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fpixelformat.cpp;h=b8180b2fb75e559477c0388eddc53509f35263ba;hb=e37851b98dde5082ee92570354746f2f92e21940;hp=738b796c5981fa307c2f9e3f15bc4f94fed1b789;hpb=d1800d7ea80290f4913d0203241cef1409656522;p=libs%2Fgl.git

diff --git a/source/pixelformat.cpp b/source/pixelformat.cpp
index 738b796c..b8180b2f 100644
--- a/source/pixelformat.cpp
+++ b/source/pixelformat.cpp
@@ -1,10 +1,6 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <msp/gl/extensions/arb_texture_float.h>
+#include <msp/gl/extensions/ext_bgra.h>
+#include <msp/strings/format.h>
 #include "pixelformat.h"
 
 using namespace std;
@@ -12,41 +8,177 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
-istream &operator>>(istream &in, PixelFormat &fmt)
+void operator>>(const LexicalConverter &conv, PixelFormat &fmt)
 {
-	string word;
-
-	in>>word;
-	if(word=="COLOR_INDEX")
-		fmt=COLOR_INDEX;
-	else if(word=="STENCIL_INDEX")
-		fmt=STENCIL_INDEX;
-	else if(word=="DEPTH_COMPONENT")
-		fmt=DEPTH_COMPONENT;
-	else if(word=="RED")
-		fmt=RED;
-	else if(word=="GREEN")
-		fmt=GREEN;
-	else if(word=="BLUE")
-		fmt=BLUE;
-	else if(word=="ALPHA")
-		fmt=ALPHA;
-	else if(word=="RGB")
-		fmt=RGB;
-	else if(word=="RGBA")
-		fmt=RGBA;
-	else if(word=="BGR")
-		fmt=BGR;
-	else if(word=="BGRA")
-		fmt=BGRA;
-	else if(word=="LUMINANCE")
-		fmt=LUMINANCE;
-	else if(word=="LUMINANCE_ALPHA")
-		fmt=LUMINANCE_ALPHA;
+	if(conv.get()=="COLOR_INDEX")
+		fmt = COLOR_INDEX;
+	else if(conv.get()=="STENCIL_INDEX")
+		fmt = STENCIL_INDEX;
+	else if(conv.get()=="DEPTH_COMPONENT")
+		fmt = DEPTH_COMPONENT;
+	else if(conv.get()=="RED")
+		fmt = RED;
+	else if(conv.get()=="GREEN")
+		fmt = GREEN;
+	else if(conv.get()=="BLUE")
+		fmt = BLUE;
+	else if(conv.get()=="ALPHA")
+		fmt = ALPHA;
+	else if(conv.get()=="RGB")
+		fmt = RGB;
+	else if(conv.get()=="RGBA")
+		fmt = RGBA;
+	else if(conv.get()=="BGR")
+		fmt = BGR;
+	else if(conv.get()=="BGRA")
+		fmt = BGRA;
+	else if(conv.get()=="SRGB")
+		fmt = SRGB;
+	else if(conv.get()=="SRGB_ALPHA")
+		fmt = SRGB_ALPHA;
+	else if(conv.get()=="LUMINANCE")
+		fmt = LUMINANCE;
+	else if(conv.get()=="LUMINANCE_ALPHA")
+		fmt = LUMINANCE_ALPHA;
+	else if(conv.get()=="SLUMINANCE")
+		fmt = SLUMINANCE;
+	else if(conv.get()=="SLUMINANCE_ALPHA")
+		fmt = SLUMINANCE_ALPHA;
 	else
-		in.setstate(ios_base::failbit);
+		throw lexical_error(format("conversion of '%s' to PixelFormat", conv.get()));
+}
+
+PixelFormat pixelformat_from_graphics(Graphics::PixelFormat pf)
+{
+	switch(pf)
+	{
+	case Graphics::COLOR_INDEX: return COLOR_INDEX;
+	case Graphics::LUMINANCE: return LUMINANCE;
+	case Graphics::LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
+	case Graphics::RGB: return RGB;
+	case Graphics::RGBX:
+	case Graphics::RGBA: return RGBA;
+	case Graphics::BGR: return BGR;
+	case Graphics::BGRX:
+	case Graphics::BGRA: return BGRA;
+	default: throw invalid_argument("pixelformat_from_graphics");
+	}
+}
 
-	return in;
+PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat pf)
+{
+	switch(pf)
+	{
+	case Graphics::RGBX:
+	case Graphics::BGR:
+	case Graphics::BGRX: return RGB;
+	case Graphics::BGRA: return RGBA;
+	default: return pixelformat_from_graphics(pf);
+	}
+}
+
+PixelFormat get_base_pixelformat(PixelFormat pf)
+{
+	switch(pf)
+	{
+	case RGB8:
+	case RGB16F:
+	case RGB32F:
+	case SRGB:
+	case SRGB8: return RGB;
+	case RGBA8:
+	case RGBA16F:
+	case RGBA32F:
+	case SRGB_ALPHA:
+	case SRGB8_ALPHA8: return RGBA;
+	case LUMINANCE8:
+	case LUMINANCE16F:
+	case LUMINANCE32F:
+	case SLUMINANCE:
+	case SLUMINANCE8: return LUMINANCE;
+	case LUMINANCE_ALPHA8:
+	case LUMINANCE_ALPHA16F:
+	case LUMINANCE_ALPHA32F:
+	case SLUMINANCE_ALPHA:
+	case SLUMINANCE8_ALPHA8: return LUMINANCE_ALPHA;
+	default: return pf;
+	}
+}
+
+PixelFormat get_srgb_pixelformat(PixelFormat pf)
+{
+	switch(pf)
+	{
+	case RGB: return SRGB;
+	case RGBA: return SRGB_ALPHA;
+	case RGB8: return SRGB8;
+	case RGBA8: return SRGB8_ALPHA8;
+	case LUMINANCE: return SLUMINANCE;
+	case LUMINANCE8: return SLUMINANCE8;
+	case LUMINANCE_ALPHA: return SLUMINANCE_ALPHA;
+	case LUMINANCE_ALPHA8: return SLUMINANCE8_ALPHA8;
+	default: return pf;
+	}
+}
+
+unsigned get_component_count(PixelFormat pf)
+{
+	switch(get_base_pixelformat(pf))
+	{
+	case COLOR_INDEX:
+	case STENCIL_INDEX:
+	case DEPTH_COMPONENT:
+	case RED:
+	case GREEN:
+	case BLUE:
+	case LUMINANCE:
+	case SLUMINANCE:
+		return 1;
+	case LUMINANCE_ALPHA:
+	case SLUMINANCE_ALPHA:
+		return 2;
+	case RGB:
+	case BGR:
+		return 3;
+	case RGBA:
+	case BGRA:
+		return 4;
+	default:
+		throw invalid_argument("get_pixelformat_component_count");
+	}
+}
+
+void require_pixelformat(PixelFormat pf)
+{
+	switch(pf)
+	{
+	case RGB16F:
+	case RGB32F:
+	case RGBA16F:
+	case RGBA32F:
+	case LUMINANCE16F:
+	case LUMINANCE32F:
+	case LUMINANCE_ALPHA16F:
+	case LUMINANCE_ALPHA32F:
+		{ static Require _req(ARB_texture_float); }
+		break;
+	case SRGB:
+	case SRGB8:
+	case SRGB_ALPHA:
+	case SRGB8_ALPHA8:
+	case SLUMINANCE:
+	case SLUMINANCE8:
+	case SLUMINANCE_ALPHA:
+	case SLUMINANCE8_ALPHA8:
+		{ static Require _req(EXT_texture_sRGB); }
+		break;
+	case BGR:
+	case BGRA:
+		{ static Require _req(EXT_bgra); }
+		break;
+	default:
+		break;
+	}
 }
 
 } // namespace GL