+++ /dev/null
-#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 {
-
-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
- 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:
- case DEPTH_COMPONENT32F: return DEPTH_COMPONENT;
- default: return pf;
- }
-}
-
-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 ARB_depth_buffer_float ? DEPTH_COMPONENT32F : 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:
- case DEPTH_COMPONENT32F:
- 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)
-{
- /* TODO These checks are only accurate for textures. On OpenGL ES some
- formats are allowed for render buffers earlier than textures. In particular
- it's possible to create a 16-bit depth renderbuffer on OpenGL ES 2.0 but
- depth textures are only available with 3.0 or the OES_depth_texture
- extension.*/
- switch(pf)
- {
- case RGB8:
- case RGBA8:
- { static Require _req(OES_required_internalformat); }
- break;
- 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:
- { static Require _req(ARB_depth_texture); }
- break;
- case DEPTH_COMPONENT16:
- case DEPTH_COMPONENT24:
- case DEPTH_COMPONENT32:
- { static Require _req(ARB_depth_texture); }
- { static Require _req(OES_required_internalformat); }
- break;
- case DEPTH_COMPONENT32F:
- { static Require _req(ARB_depth_buffer_float); }
- break;
- case STENCIL_INDEX:
- { static Require _req(OES_texture_stencil8); }
- break;
- default:
- break;
- }
-}
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / blobdiff