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Improve blending factors documentation #311

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Merged
sharkwouter merged 1 commit into from
Jul 3, 2025
Merged

Improve blending factors documentation #311

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44 changes: 26 additions & 18 deletions src/gu/pspgu.h
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Original file line number Diff line number Diff line change
Expand Up @@ -249,15 +249,21 @@ extern "C" {
#define GU_ABS (5)

/* Blending Factor */
#define GU_SRC_COLOR (0)
#define GU_ONE_MINUS_SRC_COLOR (1)
#define GU_SRC_ALPHA (2)
#define GU_ONE_MINUS_SRC_ALPHA (3)
#define GU_DST_COLOR (0)
#define GU_ONE_MINUS_DST_COLOR (1)
#define GU_DST_ALPHA (4)
#define GU_ONE_MINUS_DST_ALPHA (5)
#define GU_FIX (10)
#define GU_OTHER_COLOR (0)
#define GU_ONE_MINUS_OTHER_COLOR (1)
#define GU_SRC_ALPHA (2)
#define GU_ONE_MINUS_SRC_ALPHA (3)
#define GU_DST_ALPHA (4)
#define GU_ONE_MINUS_DST_ALPHA (5)
#define GU_DOUBLE_SRC_ALPHA (6)
#define GU_ONE_MINUS_DOUBLE_SRC_ALPHA (7)
#define GU_DOUBLE_DST_ALPHA (8)
#define GU_ONE_MINUS_DOUBLE_DST_ALPHA (9)
#define GU_FIX (10) /* Note: behavior of 11-15 blend factors is identical to GU_FIX */
#define GU_SRC_COLOR (0) /* Deprecated */
#define GU_ONE_MINUS_SRC_COLOR (1) /* Deprecated */
#define GU_DST_COLOR (0) /* Deprecated */
#define GU_ONE_MINUS_DST_COLOR (1) /* Deprecated */

/* Stencil Operations */
#define GU_KEEP (0)
Expand Down Expand Up @@ -1054,15 +1060,17 @@ void sceGuAmbientColor(unsigned int color);
* - GU_ABS - |Cs-Cd|
*
* Available blending-functions are:
* - GU_SRC_COLOR
* - GU_ONE_MINUS_SRC_COLOR
* - GU_SRC_ALPHA
* - GU_ONE_MINUS_SRC_ALPHA
* - GU_DST_ALPHA
* - GU_ONE_MINUS_DST_ALPHA
* - GU_DST_COLOR
* - GU_ONE_MINUS_DST_COLOR
* - GU_FIX
* - GU_OTHER_COLOR - dstColor if used for source operand; srcColor if used for destination operand
* - GU_ONE_MINUS_OTHER_COLOR - 1-dstColor if used for source operand; 1-srcColor if used for destination operand
* - GU_SRC_ALPHA - srcAlpha
* - GU_ONE_MINUS_SRC_ALPHA - 1-srcAlpha
* - GU_DST_ALPHA - dstAlpha
* - GU_ONE_MINUS_DST_ALPHA - 1-dstAlpha
* - GU_DOUBLE_SRC_ALPHA - 2*srcAlpha
* - GU_ONE_MINUS_DOUBLE_SRC_ALPHA - 1-2*srcAlpha
* - GU_DOUBLE_DST_ALPHA - 2*dstAlpha
* - GU_ONE_MINUS_DOUBLE_DST_ALPHA - 1-2*dstAlpha
* - GU_FIX - srcFix if used for source operand; dstFix if used for destination operand
*
* @param op - Blending Operation
* @param src - Blending function for source operand
Expand Down
2 changes: 1 addition & 1 deletion src/samples/gu/blend/blend.c
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Expand Up @@ -52,7 +52,7 @@ struct BlendState states[] =
{
{"GU_ADD, GU_SRC_ALPHA, GU_ONE_MINUS_SRC_ALPHA", GU_ADD, GU_SRC_ALPHA, GU_ONE_MINUS_SRC_ALPHA, 0, 0},
{"GU_SUBTRACT, GU_SRC_ALPHA, GU_ONE_MINUS_SRC_ALPHA", GU_SUBTRACT, GU_SRC_ALPHA, GU_ONE_MINUS_SRC_ALPHA, 0, 0},
{"GU_ALPHA_ADD, GU_SRC_COLOR, GU_DST_COLOR", GU_ADD, GU_SRC_COLOR, GU_DST_COLOR, 0, 0},
{"GU_ALPHA_ADD, GU_OTHER_COLOR, GU_OTHER_COLOR", GU_ADD, GU_OTHER_COLOR, GU_OTHER_COLOR, 0, 0},
{"GU_ADD, GU_FIX(0x700f7f7f), GU_FIX(0x3f3f3f00)", GU_ADD, GU_FIX, GU_FIX, 0x7f007f7f, 0x3f3f3f00},
{"GU_ADD, GU_FIX(0x7f7f7f7f), GU_FIX(0x7f7f7f7f)", GU_ADD, GU_FIX, GU_FIX, 0x7f7f7f7f, 0x7f7f7f7f}
};
Expand Down