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Direct Color: Difference between revisions
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'''Direct Color''' is a display technique that does not use [[CGRAM]]. Instead, the | '''Direct Color''' is a display technique that does not use [[CGRAM]]. Instead, the colors come directly from [[VRAM]]. Direct color is available only on [[BG1]], in the following background modes: | ||
* [[Mode 3]] | * [[Mode 3]] | ||
| Line 8: | Line 8: | ||
=== Colors === | === Colors === | ||
This mode gets RGB values from the palette and color number. One tile can use 256 colors, and Layer 1 can use 2041 colors. The color value comes from 3 bits R, 3 bits G, 2 bits B from the pixel value, plus 1 bit from the palette value. However, palette 00 is a transparent color rather than black, | This mode gets RGB values from the palette and color number. One tile can use 256 colors, and Layer 1 can use 2041 colors. The color value comes from 3 bits R, 3 bits G, 2 bits B from the pixel value, plus 1 bit from the palette value. However, palette 00 is a transparent color rather than black, pure black cannot be used. And, it is RGB443, pure white cannot be used. | ||
YXPbgrTT ([[YXPCCCTT]]) | YXPbgrTT ([[YXPCCCTT]]) | ||
| Line 31: | Line 31: | ||
=== References === | === References === | ||
# [https://archive.org/details/SNESDevManual/book1/page/n73 | # Chapter 8, "CG Direct Select" on [https://archive.org/details/SNESDevManual/book1/page/n73 page 2-8-1 of Book I] of the official Super Nintendo development manual | ||
# [https://archive.org/details/SNESDevManual/book1/page/n211 Appendix 17] lbid | # [https://archive.org/details/SNESDevManual/book1/page/n211 Appendix A-17] lbid | ||
# [https://archive.org/details/SNESDevManual/book1/page/n129 page 2- | # [https://archive.org/details/SNESDevManual/book1/page/n129 page 2-27-16 of Book I] lbid | ||
# [https://archive.org/details/SNESDevManual/book1/page/n199 Appendix A-5] lbid | # [https://archive.org/details/SNESDevManual/book1/page/n199 Appendix A-5] lbid | ||
=== External Links === | |||
# at least four licensed games using direct color: https://snes.nesdev.org/wiki/Uncommon_graphics_mode_games#Direct_Color | |||
# https://www.smwcentral.net/?p=viewthread&t=125133&page=1&pid=1625490#p1625490 | |||
# direct color discussed at 4:37 https://youtu.be/5SBEAZIfDAg?si=QD734cMgjbgNu7fM | |||
[[Category:Video]] | [[Category:Video]] | ||
[[Category:Flags]] | [[Category:Flags]] | ||
Latest revision as of 03:15, 13 April 2024
Direct Color is a display technique that does not use CGRAM. Instead, the colors come directly from VRAM. Direct color is available only on BG1, in the following background modes:
Direct Select is the name of the bit that turns direct color on or off. [3] It lives at bit 0 of CGSWSEL (2130h).
Colors
This mode gets RGB values from the palette and color number. One tile can use 256 colors, and Layer 1 can use 2041 colors. The color value comes from 3 bits R, 3 bits G, 2 bits B from the pixel value, plus 1 bit from the palette value. However, palette 00 is a transparent color rather than black, pure black cannot be used. And, it is RGB443, pure white cannot be used.
YXPbgrTT (YXPCCCTT) BBGGGRRR (Pixel's value)
The final color values are:
-BBb00GGGg0RRRr0
Palette 0
Palette 1
Palette 2
Palette 3
Palette 4
Palette 5
Palette 6
Palette 7
See Also
References
- Chapter 8, "CG Direct Select" on page 2-8-1 of Book I of the official Super Nintendo development manual
- Appendix A-17 lbid
- page 2-27-16 of Book I lbid
- Appendix A-5 lbid
External Links
- at least four licensed games using direct color: https://snes.nesdev.org/wiki/Uncommon_graphics_mode_games#Direct_Color
- https://www.smwcentral.net/?p=viewthread&t=125133&page=1&pid=1625490#p1625490
- direct color discussed at 4:37 https://youtu.be/5SBEAZIfDAg?si=QD734cMgjbgNu7fM