Difference between revisions of "Palettes"
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The SNES uses a 15-bit format to describe a single color entry. 5 bits are allocated to each of the three red, green, and blue color components. Therefore, a single color is stored in two bytes, as such: | The SNES uses a 15-bit format to describe a single color entry. 5 bits are allocated to each of the three red, green, and blue color components. Therefore, a single color is stored in two bytes, as such: | ||
| − | 0BBBBBGG GGGRRRRR | + | 0BBBBBGG GGGRRRRR |
| − | Note that colors are stored in little-endian format, exactly as shown. In other words, when read as a 16-bit [[Binary#Word|word]], the most significant bit of the least significant byte is 0. For example, full intensity blue would be stored as | + | Note that colors are stored in little-endian format, exactly as shown. In other words, when read as a 16-bit [[Binary#Word|word]], the most significant bit of the least significant byte is 0. For example, full intensity blue would be stored in-ROM as [7C 00]: |
| + | |||
| + | 01111100 00000000 | ||
| + | |||
| + | but would be read as $007C, or simply $7C: | ||
| + | |||
| + | 00000000 01111100 | ||
{{stub}} | {{stub}} | ||
Revision as of 13:22, 5 August 2008
A palette is a limited index of colors defined as a subset of the total range of displayable colors. Any given game will generally contain many such palettes.
SNES Palettes
The SNES uses a 15-bit format to describe a single color entry. 5 bits are allocated to each of the three red, green, and blue color components. Therefore, a single color is stored in two bytes, as such:
0BBBBBGG GGGRRRRR
Note that colors are stored in little-endian format, exactly as shown. In other words, when read as a 16-bit word, the most significant bit of the least significant byte is 0. For example, full intensity blue would be stored in-ROM as [7C 00]:
01111100 00000000
but would be read as $007C, or simply $7C:
00000000 01111100