1 #include <msp/gl/extensions/arb_texture_float.h>
2 #include <msp/gl/extensions/ext_bgra.h>
3 #include <msp/strings/format.h>
4 #include "pixelformat.h"
11 void operator>>(const LexicalConverter &conv, PixelFormat &fmt)
13 if(conv.get()=="STENCIL_INDEX")
15 else if(conv.get()=="DEPTH_COMPONENT")
16 fmt = DEPTH_COMPONENT;
17 else if(conv.get()=="RED")
19 else if(conv.get()=="RG")
21 else if(conv.get()=="RGB")
23 else if(conv.get()=="RGBA")
25 else if(conv.get()=="BGR")
27 else if(conv.get()=="BGRA")
29 else if(conv.get()=="SRGB")
31 else if(conv.get()=="SRGB_ALPHA")
33 else if(conv.get()=="LUMINANCE")
35 else if(conv.get()=="LUMINANCE_ALPHA")
36 fmt = LUMINANCE_ALPHA;
37 else if(conv.get()=="SLUMINANCE")
39 else if(conv.get()=="SLUMINANCE_ALPHA")
40 fmt = SLUMINANCE_ALPHA;
42 throw lexical_error(format("conversion of '%s' to PixelFormat", conv.get()));
45 PixelFormat pixelformat_from_graphics(Graphics::PixelFormat pf)
49 case Graphics::LUMINANCE: return LUMINANCE;
50 case Graphics::LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
51 case Graphics::RGB: return RGB;
53 case Graphics::RGBA: return RGBA;
54 case Graphics::BGR: return BGR;
56 case Graphics::BGRA: return BGRA;
57 default: throw invalid_argument("pixelformat_from_graphics");
61 PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat pf, bool srgb)
68 case Graphics::BGRX: result = RGB; break;
69 case Graphics::BGRA: result = RGBA; break;
70 default: result = pixelformat_from_graphics(pf);
74 return get_srgb_pixelformat(result);
79 PixelFormat get_base_pixelformat(PixelFormat pf)
81 PixelFormat unsized = get_unsized_pixelformat(pf);
84 case SRGB: return RGB;
85 case SRGB_ALPHA: return RGBA;
86 case SLUMINANCE: return LUMINANCE;
87 case SLUMINANCE_ALPHA: return LUMINANCE_ALPHA;
88 default: return unsized;
92 PixelFormat get_unsized_pixelformat(PixelFormat pf)
98 case R32F: return RED;
101 case RG32F: return RG;
104 case RGB32F: return RGB;
105 case SRGB8: return SRGB;
108 case RGBA32F: return RGBA;
109 case SRGB8_ALPHA8: return SRGB_ALPHA;
110 case LUMINANCE8: return LUMINANCE;
111 case SLUMINANCE8: return SLUMINANCE;
112 case LUMINANCE_ALPHA8: return LUMINANCE_ALPHA;
113 case SLUMINANCE8_ALPHA8: return SLUMINANCE_ALPHA;
114 case DEPTH_COMPONENT16:
115 case DEPTH_COMPONENT24:
116 case DEPTH_COMPONENT32:
117 case DEPTH_COMPONENT32F: return DEPTH_COMPONENT;
122 PixelFormat get_sized_pixelformat(PixelFormat pf, unsigned size)
125 throw invalid_argument("get_sized_pixelformat");
130 case SRGB_ALPHA: break;
131 case SRGB8: pf = SRGB; break;
132 case SRGB8_ALPHA8: pf = SRGB_ALPHA; break;
133 default: pf = get_base_pixelformat(pf);
143 case RGB: return RGB8;
144 case RGBA: return RGBA8;
145 case SRGB: return SRGB8;
146 case SRGB_ALPHA: return SRGB8_ALPHA8;
147 case LUMINANCE: return LUMINANCE8;
148 case SLUMINANCE: return SLUMINANCE8;
149 case LUMINANCE_ALPHA: return LUMINANCE8_ALPHA8;
150 case SLUMINANCE_ALPHA: return SLUMINANCE8_ALPHA8;
151 default: throw invalid_argument("get_sized_pixelformat");
156 case RED: return R16F;
157 case RG: return RG16F;
158 case RGB: return RGB16F;
159 case RGBA: return RGBA16F;
160 case DEPTH_COMPONENT: return DEPTH_COMPONENT16;
161 default: throw invalid_argument("get_sized_pixelformat");
164 if(pf==DEPTH_COMPONENT)
165 return DEPTH_COMPONENT24;
167 throw invalid_argument("get_sized_pixelformat");
171 case RED: return R32F;
172 case RG: return RG32F;
173 case RGB: return RGB32F;
174 case RGBA: return RGBA32F;
175 case DEPTH_COMPONENT: return ARB_depth_buffer_float ? DEPTH_COMPONENT32F : DEPTH_COMPONENT32;
176 default: throw invalid_argument("get_sized_pixelformat");
179 throw invalid_argument("get_sized_pixelformat");
183 PixelFormat get_srgb_pixelformat(PixelFormat pf)
187 case RGB: return SRGB;
188 case RGBA: return SRGB_ALPHA;
189 case RGB8: return SRGB8;
190 case RGBA8: return SRGB8_ALPHA8;
191 case LUMINANCE: return SLUMINANCE;
192 case LUMINANCE8: return SLUMINANCE8;
193 case LUMINANCE_ALPHA: return SLUMINANCE_ALPHA;
194 case LUMINANCE_ALPHA8: return SLUMINANCE8_ALPHA8;
199 unsigned get_component_count(PixelFormat pf)
201 switch(get_base_pixelformat(pf))
204 case DEPTH_COMPONENT:
210 case LUMINANCE_ALPHA:
211 case SLUMINANCE_ALPHA:
220 throw invalid_argument("get_component_count");
224 unsigned get_component_size(PixelFormat pf)
235 case LUMINANCE8_ALPHA8:
237 case SLUMINANCE8_ALPHA8:
243 case DEPTH_COMPONENT16:
245 case DEPTH_COMPONENT24:
251 case DEPTH_COMPONENT32:
252 case DEPTH_COMPONENT32F:
259 unsigned get_pixel_size(PixelFormat pf)
261 return get_component_count(pf)*max(get_component_size(pf), 1U);
264 void require_pixelformat(PixelFormat pf)
266 /* TODO These checks are only accurate for textures. On OpenGL ES some
267 formats are allowed for render buffers earlier than textures. In particular
268 it's possible to create a 16-bit depth renderbuffer on OpenGL ES 2.0 but
269 depth textures are only available with 3.0 or the OES_depth_texture
275 { static Require _req(OES_required_internalformat); }
281 { static Require _req(ARB_texture_rg); }
287 { static Require _req(ARB_texture_rg); }
288 { static Require _req(ARB_texture_float); }
294 { static Require _req(ARB_texture_float); }
302 case SLUMINANCE_ALPHA:
303 case SLUMINANCE8_ALPHA8:
304 { static Require _req(EXT_texture_sRGB); }
308 { static Require _req(EXT_bgra); }
310 case DEPTH_COMPONENT:
311 { static Require _req(ARB_depth_texture); }
313 case DEPTH_COMPONENT16:
314 case DEPTH_COMPONENT24:
315 case DEPTH_COMPONENT32:
316 { static Require _req(ARB_depth_texture); }
317 { static Require _req(OES_required_internalformat); }
319 case DEPTH_COMPONENT32F:
320 { static Require _req(ARB_depth_buffer_float); }
323 { static Require _req(OES_texture_stencil8); }