X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fpixelformat.cpp;h=99f15307d1304bf41c36c80aa7af825fd41a7171;hb=0221e39a685c4f3122a0fae032a7888b5ce40579;hp=8f742d83c38fcd012e0a46068eb96a0a350820aa;hpb=2e7f19b895424c3a77940e648639f8df2b395d0f;p=libs%2Fgl.git

diff --git a/source/pixelformat.cpp b/source/pixelformat.cpp
index 8f742d83..99f15307 100644
--- a/source/pixelformat.cpp
+++ b/source/pixelformat.cpp
@@ -1,3 +1,5 @@
+#include <msp/gl/extensions/arb_texture_float.h>
+#include <msp/gl/extensions/ext_bgra.h>
 #include <msp/strings/format.h>
 #include "pixelformat.h"
 
@@ -6,77 +8,206 @@ 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")
+	if(conv.get()=="STENCIL_INDEX")
 		fmt = STENCIL_INDEX;
-	else if(word=="DEPTH_COMPONENT")
+	else if(conv.get()=="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")
+	else if(conv.get()=="RGB")
 		fmt = RGB;
-	else if(word=="RGBA")
+	else if(conv.get()=="RGBA")
 		fmt = RGBA;
-	else if(word=="BGR")
+	else if(conv.get()=="BGR")
 		fmt = BGR;
-	else if(word=="BGRA")
+	else if(conv.get()=="BGRA")
 		fmt = BGRA;
-	else if(word=="LUMINANCE")
+	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(word=="LUMINANCE_ALPHA")
+	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);
-
-	return in;
+		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");
 	}
 }
 
+PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat pf, bool srgb)
+{
+	PixelFormat result;
+	switch(pf)
+	{
+	case Graphics::RGBX:
+	case Graphics::BGR:
+	case Graphics::BGRX: result = RGB; break;
+	case Graphics::BGRA: result = RGBA; break;
+	default: result = pixelformat_from_graphics(pf);
+	}
+
+	if(srgb)
+		return get_srgb_pixelformat(result);
+	else
+		return result;
+}
+
 PixelFormat get_base_pixelformat(PixelFormat pf)
 {
 	switch(pf)
 	{
 	case RGB8:
 	case RGB16F:
-	case RGB32F: return RGB;
+	case RGB32F:
+	case SRGB:
+	case SRGB8: return RGB;
 	case RGBA8:
 	case RGBA16F:
-	case RGBA32F: return RGBA;
+	case RGBA32F:
+	case SRGB_ALPHA:
+	case SRGB8_ALPHA8: return RGBA;
 	case LUMINANCE8:
 	case LUMINANCE16F:
-	case LUMINANCE32F: return LUMINANCE;
+	case LUMINANCE32F:
+	case SLUMINANCE:
+	case SLUMINANCE8: return LUMINANCE;
 	case LUMINANCE_ALPHA8:
 	case LUMINANCE_ALPHA16F:
-	case LUMINANCE_ALPHA32F: return LUMINANCE_ALPHA;
+	case LUMINANCE_ALPHA32F:
+	case SLUMINANCE_ALPHA:
+	case SLUMINANCE8_ALPHA8: return LUMINANCE_ALPHA;
+	case DEPTH_COMPONENT16:
+	case DEPTH_COMPONENT24:
+	case DEPTH_COMPONENT32: return DEPTH_COMPONENT;
 	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 STENCIL_INDEX:
+	case DEPTH_COMPONENT:
+	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_component_count");
+	}
+}
+
+unsigned get_component_size(PixelFormat pf)
+{
+	switch(pf)
+	{
+	case RGB16F:
+	case RGBA16F:
+	case LUMINANCE16F:
+	case LUMINANCE_ALPHA16F:
+	case DEPTH_COMPONENT16:
+		return 2;
+	case DEPTH_COMPONENT24:
+		return 3;
+	case RGB32F:
+	case RGBA32F:
+	case LUMINANCE32F:
+	case LUMINANCE_ALPHA32F:
+	case DEPTH_COMPONENT32:
+		return 4;
+	default:
+		return 1;
+	}
+}
+
+unsigned get_pixel_size(PixelFormat pf)
+{
+	return get_component_count(pf)*get_component_size(pf);
+}
+
+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;
+	case DEPTH_COMPONENT:
+	case DEPTH_COMPONENT16:
+	case DEPTH_COMPONENT24:
+	case DEPTH_COMPONENT32:
+		{ static Require _req(ARB_depth_texture); }
+		break;
+	default:
+		break;
+	}
+}
+
 } // namespace GL
 } // namespace Msp