diff options
Diffstat (limited to 'cogl')
| -rw-r--r-- | cogl/cogl/cogl-pixel-format.c | 245 | ||||
| -rw-r--r-- | cogl/cogl/cogl-pixel-format.h | 11 |
2 files changed, 244 insertions, 12 deletions
diff --git a/cogl/cogl/cogl-pixel-format.c b/cogl/cogl/cogl-pixel-format.c index 45e3cb774..a8c0857a6 100644 --- a/cogl/cogl/cogl-pixel-format.c +++ b/cogl/cogl/cogl-pixel-format.c @@ -36,6 +36,204 @@ #include "cogl-pixel-format.h" +/* An entry to map CoglPixelFormats to their respective properties */ +typedef struct _CoglPixelFormatInfo +{ + CoglPixelFormat cogl_format; + const char *format_str; + int bpp; /* Bytes per pixel */ + int aligned; /* Aligned components? (-1 if n/a) */ +} CoglPixelFormatInfo; + +static const CoglPixelFormatInfo format_info_table[] = { + { + .cogl_format = COGL_PIXEL_FORMAT_ANY, + .format_str = "ANY", + .bpp = 0, + .aligned = -1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_A_8, + .format_str = "A_8", + .bpp = 1, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGB_565, + .format_str = "RGB_565", + .bpp = 2, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_4444, + .format_str = "RGBA_4444", + .bpp = 2, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_5551, + .format_str = "RGBA_5551", + .bpp = 2, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_YUV, + .format_str = "YUV", + .bpp = 0, + .aligned = -1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_G_8, + .format_str = "G_8", + .bpp = 1, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RG_88, + .format_str = "RG_88", + .bpp = 2, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGB_888, + .format_str = "RGB_888", + .bpp = 3, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_BGR_888, + .format_str = "BGR_888", + .bpp = 3, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_8888, + .format_str = "RGBA_8888", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_BGRA_8888, + .format_str = "BGRA_8888", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ARGB_8888, + .format_str = "ARGB_8888", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ABGR_8888, + .format_str = "ABGR_8888", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_1010102, + .format_str = "RGBA_1010102", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_BGRA_1010102, + .format_str = "BGRA_1010102", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ARGB_2101010, + .format_str = "ARGB_2101010", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ABGR_2101010, + .format_str = "ABGR_2101010", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_8888_PRE, + .format_str = "RGBA_8888_PRE", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_BGRA_8888_PRE, + .format_str = "BGRA_8888_PRE", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ARGB_8888_PRE, + .format_str = "ARGB_8888_PRE", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ABGR_8888_PRE, + .format_str = "ABGR_8888_PRE", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_4444_PRE, + .format_str = "RGBA_4444_PRE", + .bpp = 2, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_5551_PRE, + .format_str = "RGBA_5551_PRE", + .bpp = 2, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_RGBA_1010102_PRE, + .format_str = "RGBA_1010102_PRE", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_BGRA_1010102_PRE, + .format_str = "BGRA_1010102_PRE", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ARGB_2101010_PRE, + .format_str = "ARGB_2101010_PRE", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_ABGR_2101010_PRE, + .format_str = "ABGR_2101010_PRE", + .bpp = 4, + .aligned = 0 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_DEPTH_16, + .format_str = "DEPTH_16", + .bpp = 2, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_DEPTH_32, + .format_str = "DEPTH_32", + .bpp = 4, + .aligned = 1 + }, + { + .cogl_format = COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8, + .format_str = "DEPTH_24_STENCIL_8", + .bpp = 4, + .aligned = 1 + }, +}; + /* * Returns the number of bytes-per-pixel of a given format. The bpp * can be extracted from the least significant nibble of the pixel @@ -59,12 +257,15 @@ int _cogl_pixel_format_get_bytes_per_pixel (CoglPixelFormat format) { - int bpp_lut[] = { 0, 1, 3, 4, - 2, 2, 2, 0, - 1, 2, 0, 0, - 3, 4, 0, 0 }; + size_t i; + + for (i = 0; i < G_N_ELEMENTS (format_info_table); i++) + { + if (format_info_table[i].cogl_format == format) + return format_info_table[i].bpp; + } - return bpp_lut [format & 0xf]; + g_assert_not_reached (); } /* Note: this also refers to the mapping defined above for @@ -72,18 +273,38 @@ _cogl_pixel_format_get_bytes_per_pixel (CoglPixelFormat format) gboolean _cogl_pixel_format_is_endian_dependant (CoglPixelFormat format) { - int aligned_lut[] = { -1, 1, 1, 1, - 0, 0, 0, -1, - 1, 1, -1, -1, - 0, 0, -1, -1}; - int aligned = aligned_lut[format & 0xf]; - - g_return_val_if_fail (aligned != -1, FALSE); + int aligned = -1; + size_t i; /* NB: currently checking whether the format components are aligned * or not determines whether the format is endian dependent or not. * In the future though we might consider adding formats with * aligned components that are also endian independant. */ + for (i = 0; i < G_N_ELEMENTS (format_info_table); i++) + { + if (format_info_table[i].cogl_format == format) + { + aligned = format_info_table[i].aligned; + break; + } + } + + g_return_val_if_fail (aligned != -1, FALSE); + return aligned; } + +const char * +cogl_pixel_format_to_string (CoglPixelFormat format) +{ + size_t i; + + for (i = 0; i < G_N_ELEMENTS (format_info_table); i++) + { + if (format_info_table[i].cogl_format == format) + return format_info_table[i].format_str; + } + + g_assert_not_reached (); +} diff --git a/cogl/cogl/cogl-pixel-format.h b/cogl/cogl/cogl-pixel-format.h index 09b5feff0..c2659fee0 100644 --- a/cogl/cogl/cogl-pixel-format.h +++ b/cogl/cogl/cogl-pixel-format.h @@ -284,6 +284,17 @@ _cogl_pixel_format_is_endian_dependant (CoglPixelFormat format); #define COGL_PIXEL_FORMAT_CAN_HAVE_PREMULT(format) \ (((format) & COGL_A_BIT) && (format) != COGL_PIXEL_FORMAT_A_8) +/** + * cogl_pixel_format_to_string: + * @format: a #CoglPixelFormat + * + * Returns a string representation of @format, useful for debugging purposes. + * + * Returns: (transfer none): A string representation of @format. + */ +const char * +cogl_pixel_format_to_string (CoglPixelFormat format); + G_END_DECLS #endif /* __COGL_PIXEL_FORMAT_H__ */ |