1 #ifndef MSP_GL_PIXELFORMAT_H_
2 #define MSP_GL_PIXELFORMAT_H_
4 #include <msp/graphics/image.h>
5 #include <msp/strings/lexicalcast.h>
13 Identifies the components of a pixel, without type information. The values
14 are bitfields laid as follows:
17 │││ │ └╴Number of components
20 │└──────╴Reverse order flag
21 └───────╴Grayscale flag
23 This information is presented for internal documentation purposes only; it is
24 inadvisable for programs to rely on it.
32 DEPTH_COMPONENT = 0x09,
37 LUMINANCE_ALPHA = 0x42
41 Identifies a pixel format, with components and type. The values are bitfields
45 ││││ │ └╴Components (see PixelComponents)
46 ││││ └──────────╴Size of one component (bytes)
47 │││└───────────────╴Signed flag
48 ││└────────────────╴Floating-point flag
49 │└─────────────────╴Normalized flag
50 └──────────────────╴sRGB flag
52 This information is presented for internal documentation purposes only; it is
53 inadvisable for programs to rely on it.
67 RGBA16F = 0x3200|RGBA,
68 RGBA32F = 0x3400|RGBA,
70 SRGB8_ALPHA8 = 0xC100|RGBA,
74 SBGR8_ALPHA8 = 0xC100|BGRA,
75 LUMINANCE8 = 0x4100|LUMINANCE,
76 LUMINANCE8_ALPHA8 = 0x4100|LUMINANCE_ALPHA,
77 DEPTH_COMPONENT16 = 0x4200|DEPTH_COMPONENT,
78 DEPTH_COMPONENT24 = 0x4300|DEPTH_COMPONENT,
79 DEPTH_COMPONENT32 = 0x4400|DEPTH_COMPONENT,
80 DEPTH_COMPONENT32F = 0x3400|DEPTH_COMPONENT,
81 STENCIL_INDEX8 = 0x0100|STENCIL_INDEX
84 void operator>>(const LexicalConverter &, PixelComponents &);
85 void operator>>(const LexicalConverter &, PixelFormat &);
87 PixelComponents components_from_graphics(Graphics::PixelFormat);
88 PixelFormat pixelformat_from_image(const Graphics::Image &);
90 PixelFormat make_pixelformat(PixelComponents, DataType, bool = false);
91 inline PixelComponents get_components(PixelFormat f) { return static_cast<PixelComponents>(f&0xFF); }
92 inline unsigned get_component_count(PixelComponents c) { return c&7; }
93 inline unsigned get_component_count(PixelFormat f) { return get_component_count(get_components(f)); }
94 inline DataType get_component_type(PixelFormat f) { return static_cast<DataType>((f&0xF00)>>8 | (f&0x3000)>>4); }
95 inline unsigned get_component_size(PixelFormat f) { return get_type_size(get_component_type(f)); }
96 inline bool is_srgb(PixelFormat f) { return f&0x8000; }
97 inline unsigned get_pixel_size(PixelFormat f) { return get_component_count(f)*get_type_size(get_component_type(f)); }
99 void require_pixelformat(PixelFormat);
101 GLenum get_gl_components(PixelComponents);
102 GLenum get_gl_pixelformat(PixelFormat);