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");
127 pf = get_unsized_pixelformat(pf);
136 case RGB: return RGB8;
137 case RGBA: return RGBA8;
138 case SRGB: return SRGB8;
139 case SRGB_ALPHA: return SRGB8_ALPHA8;
140 case LUMINANCE: return LUMINANCE8;
141 case SLUMINANCE: return SLUMINANCE8;
142 case LUMINANCE_ALPHA: return LUMINANCE8_ALPHA8;
143 case SLUMINANCE_ALPHA: return SLUMINANCE8_ALPHA8;
144 default: throw invalid_argument("get_sized_pixelformat");
149 case RED: return R16F;
150 case RG: return RG16F;
151 case RGB: return RGB16F;
152 case RGBA: return RGBA16F;
153 case DEPTH_COMPONENT: return DEPTH_COMPONENT16;
154 default: throw invalid_argument("get_sized_pixelformat");
157 if(pf==DEPTH_COMPONENT)
158 return DEPTH_COMPONENT24;
160 throw invalid_argument("get_sized_pixelformat");
164 case RED: return R32F;
165 case RG: return RG32F;
166 case RGB: return RGB32F;
167 case RGBA: return RGBA32F;
168 case DEPTH_COMPONENT: return ARB_depth_buffer_float ? DEPTH_COMPONENT32F : DEPTH_COMPONENT32;
169 default: throw invalid_argument("get_sized_pixelformat");
172 throw invalid_argument("get_sized_pixelformat");
176 PixelFormat get_default_sized_pixelformat(PixelFormat pf)
178 pf = get_unsized_pixelformat(pf);
180 if(pf==DEPTH_COMPONENT)
182 if(get_gl_api()==OPENGL_ES2 && !ARB_depth_buffer_float)
187 return get_sized_pixelformat(pf, size);
190 PixelFormat get_srgb_pixelformat(PixelFormat pf)
194 case RGB: return SRGB;
195 case RGBA: return SRGB_ALPHA;
196 case RGB8: return SRGB8;
197 case RGBA8: return SRGB8_ALPHA8;
198 case LUMINANCE: return SLUMINANCE;
199 case LUMINANCE8: return SLUMINANCE8;
200 case LUMINANCE_ALPHA: return SLUMINANCE_ALPHA;
201 case LUMINANCE_ALPHA8: return SLUMINANCE8_ALPHA8;
206 unsigned get_component_count(PixelFormat pf)
208 switch(get_base_pixelformat(pf))
211 case DEPTH_COMPONENT:
217 case LUMINANCE_ALPHA:
218 case SLUMINANCE_ALPHA:
227 throw invalid_argument("get_component_count");
231 unsigned get_component_size(PixelFormat pf)
242 case LUMINANCE8_ALPHA8:
244 case SLUMINANCE8_ALPHA8:
250 case DEPTH_COMPONENT16:
252 case DEPTH_COMPONENT24:
258 case DEPTH_COMPONENT32:
259 case DEPTH_COMPONENT32F:
266 unsigned get_pixel_size(PixelFormat pf)
268 return get_component_count(pf)*max(get_component_size(pf), 1U);
271 void require_pixelformat(PixelFormat pf)
273 /* TODO These checks are only accurate for textures. On OpenGL ES some
274 formats are allowed for render buffers earlier than textures. In particular
275 it's possible to create a 16-bit depth renderbuffer on OpenGL ES 2.0 but
276 depth textures are only available with 3.0 or the OES_depth_texture
282 { static Require _req(OES_required_internalformat); }
288 { static Require _req(ARB_texture_rg); }
294 { static Require _req(ARB_texture_rg); }
295 { static Require _req(ARB_texture_float); }
301 { static Require _req(ARB_texture_float); }
309 case SLUMINANCE_ALPHA:
310 case SLUMINANCE8_ALPHA8:
311 { static Require _req(EXT_texture_sRGB); }
315 { static Require _req(EXT_bgra); }
317 case DEPTH_COMPONENT:
318 { static Require _req(ARB_depth_texture); }
320 case DEPTH_COMPONENT16:
321 case DEPTH_COMPONENT24:
322 case DEPTH_COMPONENT32:
323 { static Require _req(ARB_depth_texture); }
324 { static Require _req(OES_required_internalformat); }
326 case DEPTH_COMPONENT32F:
327 { static Require _req(ARB_depth_buffer_float); }
330 { static Require _req(OES_texture_stencil8); }