[OPENGL] RGBA16 e BGRA16 Textures

How they can be used textures with pixel formats RGBA16 (R5:G5:B5:A1)
and BGRA16 (B5:G5:R5:A1) in an OpenGL application,
withouth converting them to RGBA32 ones ?

I need it for using 16-bit BMP files (which are always BGRA16) as textures ,
and i prefer not to convert them because the RGBA32
ones imply heavy texture transfers from/to video memory
(2 times slower than RGBA16 ones)

don't know how universal the support of these is, although i've successfully used 5 6 5 reverse

Code:

#define GL_UNSIGNED_BYTE_3_3_2 0x8032 #define GL_UNSIGNED_SHORT_4_4_4_4 0x8033 #define GL_UNSIGNED_SHORT_5_5_5_1 0x8034 #define GL_UNSIGNED_INT_8_8_8_8 0x8035 #define GL_UNSIGNED_INT_10_10_10_2 0x8036 #define GL_RESCALE_NORMAL 0x803A #define GL_UNSIGNED_BYTE_2_3_3_REV 0x8362 #define GL_UNSIGNED_SHORT_5_6_5 0x8363 #define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364 #define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365 #define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367

Quote:

Originally Posted by moi

don't know how universal the support of these is, although i've successfully used 5 6 5 reverse

Code:

#define GL_UNSIGNED_BYTE_3_3_2 0x8032 #define GL_UNSIGNED_SHORT_4_4_4_4 0x8033 #define GL_UNSIGNED_SHORT_5_5_5_1 0x8034 #define GL_UNSIGNED_INT_8_8_8_8 0x8035 #define GL_UNSIGNED_INT_10_10_10_2 0x8036 #define GL_RESCALE_NORMAL 0x803A #define GL_UNSIGNED_BYTE_2_3_3_REV 0x8362 #define GL_UNSIGNED_SHORT_5_6_5 0x8363 #define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364 #define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365 #define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366 #define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367

perhaps ,for using 16 bit RGBA textures i have to call glTexImage2D as this

Code:

#define GL_UNSIGNED_SHORT_5_5_5_1 0x8034 glTexImage2D(GL_TEXTURE_2D,GL_RGBA_16,width,height, border,GL_RGBA,GL_UNSIGNED_SHORT,pixels); // or GL_UNSIGNED_SHORT_5_5_5_1 instead of GL_UNSIGNED_SHORT

ok thank you