Nintendo 1504166 Programming Manual - Page 83
Blending, levels of semi-transparency Operations, Brightness Increase Operations
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AGB Programming Manual Color Special Effects The color special effects arithmetic expressions that use the coefficients are shown below. 1. α Blending (16 levels of semi-transparency) Operations Display color (R) = 1st pixel color (R) ×EVA + 2nd pixel color (R)×EVB Display color (G) = 1st pixel color (G) ×EVA + 2nd pixel color (G) ×EVB Display color (B) = 1st pixel color (B) ×EVA + 2nd pixel color (B) ×EVB 2. Brightness Increase Operations Display color (R) = 1st pixel (R) + (31 - 1st pixel (R) ) ×EVY Display color (G) = 1st pixel (G) + (63 - 1st pixel (G) ) ×EVY Display color (B) = 1st pixel (B) + (31 - 1st pixel (B) ) ×EVY 3. Brightness Decrease Operations Display color (R) = 1st pixel (R) - 1st pixel (R) ×EVY Display color (G) = 1st pixel (G) - 1st pixel (G) ×EVY Display color (B) = 1st pixel (B) - 1st pixel (B) ×EVY ©1999 - 2001 Nintendo of America Inc. 83 D.C.N. AGB-06-0001-002B4