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[MOVED FROM BAD 28/29] shapewipe: Scale mask alpha values by the source alpha values

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Sebastian Dröge 2010-02-10 10:50:49 +01:00
parent 8786380c9a
commit e9f9f4cfd4
1 changed files with 6 additions and 4 deletions
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10
gst/shapewipe/gstshapewipe.c
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@ -808,14 +808,15 @@ gst_shape_wipe_blend_ayuv_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
output[2] = 0x80; /* U */ \ output[2] = 0x80; /* U */ \
output[3] = 0x80; /* V */ \ output[3] = 0x80; /* V */ \
} else if (in >= high_i) { \ } else if (in >= high_i) { \
output[0] = 0xff; /* A */ \ output[0] = input[0]; /* A */ \
output[1] = input[1]; /* Y */ \ output[1] = input[1]; /* Y */ \
output[2] = input[2]; /* U */ \ output[2] = input[2]; /* U */ \
output[3] = input[3]; /* V */ \ output[3] = input[3]; /* V */ \
} else { \ } else { \
guint32 val; \ guint32 val; \
/* Note: This will never overflow or be larger than 255! */ \ /* Note: This will never overflow or be larger than 255! */ \
val = ((((in - low_i) << 16) + round_i) / (high_i - low_i)) >> 8; \ val = (((in - low_i) << 16) + round_i) / (high_i - low_i); \
val = (val * input[0] + 32768) >> 16; \
\ \
output[0] = val; /* A */ \ output[0] = val; /* A */ \
output[1] = input[1]; /* Y */ \ output[1] = input[1]; /* Y */ \
@ -876,14 +877,15 @@ gst_shape_wipe_blend_##name##_##depth (GstShapeWipe * self, GstBuffer * inbuf, \
output[g] = 0x00; /* G */ \ output[g] = 0x00; /* G */ \
output[b] = 0x00; /* B */ \ output[b] = 0x00; /* B */ \
} else if (in >= high_i) { \ } else if (in >= high_i) { \
output[a] = 0xff; /* A */ \ output[a] = input[a]; /* A */ \
output[r] = input[r]; /* R */ \ output[r] = input[r]; /* R */ \
output[g] = input[g]; /* G */ \ output[g] = input[g]; /* G */ \
output[b] = input[b]; /* B */ \ output[b] = input[b]; /* B */ \
} else { \ } else { \
guint32 val; \ guint32 val; \
/* Note: This will never overflow or be larger than 255! */ \ /* Note: This will never overflow or be larger than 255! */ \
val = ((((in - low_i) << 16) + round_i) / (high_i - low_i)) >> 8; \ val = (((in - low_i) << 16) + round_i) / (high_i - low_i); \
val = (val * input[a] + 32768) >> 16; \
\ \
output[a] = val; /* A */ \ output[a] = val; /* A */ \
output[r] = input[r]; /* R */ \ output[r] = input[r]; /* R */ \