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Line 1: − + − − == General information == − Individual texels in a texture are laid out in memory as a [http://en.wikipedia.org/wiki/Z-order_curve Z-order curve]. Mipmap data is stored directly following the main texture data. − − == Texture unit setup: Register 0x80 == − Register 0x80 is used to enable individual texture units. − − {| class="wikitable" border="1" − ! Bit − ! Description − |- − | 0 − | Enable texture unit 0. − |- − | 1 − | Enable texture unit 1. − |- − | 2 − | Enable texture unit 2. − |} − − == Configuration of texture unit 0 == − {| class="wikitable" border="1" − ! Register ID − ! Description − |- − | 0x0081 − | Border color (unverified) − |- − | 0x0082 − | Bits 16-31 are the texture width. Bits 0-15 are the texture height. The maximum texture size in either direction is 1024. − |- − | 0x0083 − | Texture parameters (filtering, wrapping), see below. − |- − | 0x0084 − | LOD setup? − |- − | 0x0085 − | Physical address of texture data (divided by 8). − |- − | 0x0086 − | Physical address of texture data for cube mapping? − |- − | 0x0087 − | Physical address of texture data for cube mapping? − |- − | 0x0088 − | Physical address of texture data for cube mapping? − |- − | 0x0089 − | Physical address of texture data for cube mapping? − |- − | 0x008A − | Physical address of texture data for cube mapping? − |- − | 0x008B − | Shadow related? − |- − | 0x008E − | Texture format (see below) − |} − − == Configuration of texture units 1 and 2 == − Texture units 1 and 2 use a configuration block similar to the one of texture unit 0. They are based at registers 0x0091 and 0x0099. − − {| class="wikitable" border="1" − ! Index word − ! Description − |- − | 0-4 − | Same as for texture unit 0 − |- − | 5 − | Texture format (see below) − |} − − == Configuration of texture unit 3 == − The configuration block for texture unit 3 seems to be vastly different from the other texture units. Instead, registers 0x00A8 through 0x00B7 are used to configure [[GPU/Procedural_Texture_Generation|procedural texturing]] features. − − == Texture parameters == − {| class="wikitable" border="1" − ! Bit − ! Description − ! GL parameter name − |- − | 0 − | Normally this is value 0. − | − |- − | 1 − | 0 = point sampling (GL_NEAREST), 1 = linear interpolation (GL_LINEAR) − | GL_TEXTURE_MAG_FILTER − |- − | 2 − | 0 = point sampling (GL_NEAREST*), 1 = linear interpolation (GL_LINEAR*) − | GL_TEXTURE_MIN_FILTER − |- − | 3 − | Unused? − | ? − |- − | 5-4 − | 2 = texture color type 0xC, 0 otherwise.(Enable/disable texture data compression?) 0 = unknown, 1 = unknown, 3 = same effect as value 2. − | − |- − | 7-6 − | Unused − |- − | 11-8 − | 0 = GL_CLAMP_TO_EDGE, 1 = GL_CLAMP_TO_BORDER, 2 = GL_REPEAT, 3 = GL_MIRRORED_REPEAT − | GL_TEXTURE_WRAP_S − |- − | 15-12 − | Same values as GL_TEXTURE_WRAP_S. − | GL_TEXTURE_WRAP_T − |- − | 24 − | 0 = no LOD interpolation (GL_*_MIPMAP_NEAREST), 1 = linear LOD interpolation (GL_*_MIPMAP_LINEAR) − | GL_TEXTURE_MIN_FILTER − |- − | 27-25 − | Unused? − |- − | 30-28 − | When some flag=1: value1=GL_TEXTURE_2D, value0 when the input parameter is not GL_TEXTURE_2D. When some flag=0: 0=GL_TEXTURE_2D, 1-4=unknown. − | ? − |- − | 31 − | Unused? − | ? − |} − − == Texture color types == − {| class="wikitable" border="1" − ! Value − ! Description − ! GL Format − ! GL Data Type − |- − | 0x0 − | RGBA8888 − | GL_RGBA − | GL_UNSIGNED_BYTE − |- − | 0x1 − | RGB888 − | GL_RGB − | GL_UNSIGNED_BYTE − |- − | 0x2 − | RGBA5551 − | GL_RGBA − | GL_UNSIGNED_SHORT_5_5_5_1 − |- − | 0x3 − | RGB565 − | GL_RGB − | GL_UNSIGNED_SHORT_5_6_5 − |- − | 0x4 − | RGBA4444 − | GL_RGBA − | GL_UNSIGNED_SHORT_4_4_4_4 − |- − | 0x5 − | IA8 − | GL_LUMINANCE_ALPHA − | GL_UNSIGNED_BYTE − |- − | 0x6 − | HILO8 − | − | − |- − | 0x7 − | I8 − | GL_LUMINANCE − | GL_UNSIGNED_BYTE − |- − | 0x8 − | A8 − | GL_ALPHA − | GL_UNSIGNED_BYTE − |- − | 0x9 − | IA44 − | GL_LUMINANCE_ALPHA − | GL_UNSIGNED_BYTE_4_4_EXT − |- − | 0xA − | I4 − | − | − |- − | 0xB − | A4 − | GL_ALPHA − | GL_UNSIGNED_NIBBLE_EXT − |- − | 0xC − | ETC1 − | GL_ETC1_RGB8_OES − | − |- − | 0xD − | ETC1A4 − | − | − |} − − [[Category:GPU]]
Replaced content with "This page is obsolete, see here for GPU register information, including that of textures."
This page describes the [[GPU_Commands|GPU commands]] used for textures.
This page is obsolete, see [[GPU/Internal_Registers|here]] for GPU register information, including that of textures.