-/* $Id$
-
-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;
namespace Msp {
namespace GL {
-istream &operator>>(istream &in, 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;
+void operator>>(const LexicalConverter &conv, PixelFormat &fmt)
+{
+ 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()=="RG")
+ fmt = RG;
+ 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
+ throw lexical_error(format("conversion of '%s' to PixelFormat", conv.get()));
+}
+
+PixelFormat pixelformat_from_graphics(Graphics::PixelFormat pf)
+{
+ switch(pf)
+ {
+ 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
- in.setstate(ios_base::failbit);
+ return result;
+}
+
+PixelFormat get_base_pixelformat(PixelFormat pf)
+{
+ PixelFormat unsized = get_unsized_pixelformat(pf);
+ switch(unsized)
+ {
+ case SRGB: return RGB;
+ case SRGB_ALPHA: return RGBA;
+ case SLUMINANCE: return LUMINANCE;
+ case SLUMINANCE_ALPHA: return LUMINANCE_ALPHA;
+ default: return unsized;
+ }
+}
+
+PixelFormat get_unsized_pixelformat(PixelFormat pf)
+{
+ switch(pf)
+ {
+ case R8:
+ case R16F:
+ case R32F: return RED;
+ case RG8:
+ case RG16F:
+ case RG32F: return RG;
+ case RGB8:
+ case RGB16F:
+ case RGB32F: return RGB;
+ case SRGB8: return SRGB;
+ case RGBA8:
+ case RGBA16F:
+ case RGBA32F: return RGBA;
+ case SRGB8_ALPHA8: return SRGB_ALPHA;
+ case LUMINANCE8: return LUMINANCE;
+ case SLUMINANCE8: return SLUMINANCE;
+ case LUMINANCE_ALPHA8: return LUMINANCE_ALPHA;
+ case SLUMINANCE8_ALPHA8: return SLUMINANCE_ALPHA;
+ case DEPTH_COMPONENT16:
+ case DEPTH_COMPONENT24:
+ case DEPTH_COMPONENT32: return DEPTH_COMPONENT;
+ default: return pf;
+ }
+}
- return in;
+PixelFormat get_sized_pixelformat(PixelFormat pf, unsigned size)
+{
+ if(!size || size>4)
+ throw invalid_argument("get_sized_pixelformat");
+
+ switch(pf)
+ {
+ case SRGB:
+ case SRGB_ALPHA: break;
+ case SRGB8: pf = SRGB; break;
+ case SRGB8_ALPHA8: pf = SRGB_ALPHA; break;
+ default: pf = get_base_pixelformat(pf);
+ }
+
+ switch(size)
+ {
+ case 1:
+ switch(pf)
+ {
+ case RED: return R8;
+ case RG: return RG8;
+ case RGB: return RGB8;
+ case RGBA: return RGBA8;
+ case SRGB: return SRGB8;
+ case SRGB_ALPHA: return SRGB8_ALPHA8;
+ case LUMINANCE: return LUMINANCE8;
+ case SLUMINANCE: return SLUMINANCE8;
+ case LUMINANCE_ALPHA: return LUMINANCE8_ALPHA8;
+ case SLUMINANCE_ALPHA: return SLUMINANCE8_ALPHA8;
+ default: throw invalid_argument("get_sized_pixelformat");
+ }
+ case 2:
+ switch(pf)
+ {
+ case RED: return R16F;
+ case RG: return RG16F;
+ case RGB: return RGB16F;
+ case RGBA: return RGBA16F;
+ case DEPTH_COMPONENT: return DEPTH_COMPONENT16;
+ default: throw invalid_argument("get_sized_pixelformat");
+ }
+ case 3:
+ if(pf==DEPTH_COMPONENT)
+ return DEPTH_COMPONENT24;
+ else
+ throw invalid_argument("get_sized_pixelformat");
+ case 4:
+ switch(pf)
+ {
+ case RED: return R32F;
+ case RG: return RG32F;
+ case RGB: return RGB32F;
+ case RGBA: return RGBA32F;
+ case DEPTH_COMPONENT: return DEPTH_COMPONENT32;
+ default: throw invalid_argument("get_sized_pixelformat");
+ }
+ default:
+ throw invalid_argument("get_sized_pixelformat");
+ }
+}
+
+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 RED:
+ case LUMINANCE:
+ case SLUMINANCE:
+ return 1;
+ case RG:
+ 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 R8:
+ case RG8:
+ case RGB8:
+ case RGBA8:
+ case SRGB8:
+ case SRGB8_ALPHA8:
+ case LUMINANCE8:
+ case LUMINANCE8_ALPHA8:
+ case SLUMINANCE8:
+ case SLUMINANCE8_ALPHA8:
+ return 1;
+ case R16F:
+ case RG16F:
+ case RGB16F:
+ case RGBA16F:
+ case DEPTH_COMPONENT16:
+ return 2;
+ case DEPTH_COMPONENT24:
+ return 3;
+ case R32F:
+ case RG32F:
+ case RGB32F:
+ case RGBA32F:
+ case DEPTH_COMPONENT32:
+ return 4;
+ default:
+ return 0;
+ }
+}
+
+unsigned get_pixel_size(PixelFormat pf)
+{
+ return get_component_count(pf)*max(get_component_size(pf), 1U);
+}
+
+void require_pixelformat(PixelFormat pf)
+{
+ switch(pf)
+ {
+ case RED:
+ case R8:
+ case RG:
+ case RG8:
+ { static Require _req(ARB_texture_rg); }
+ break;
+ case R16F:
+ case R32F:
+ case RG16F:
+ case RG32F:
+ { static Require _req(ARB_texture_rg); }
+ { static Require _req(ARB_texture_float); }
+ break;
+ case RGB16F:
+ case RGB32F:
+ case RGBA16F:
+ case RGBA32F:
+ { 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