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shapewipe: Adjust border to still have everything transparent at 1.0 and the other way around

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This commit is contained in:
Sebastian Dröge 2009-05-29 21:07:26 +02:00
parent 332dae7198
commit 01b8bacd1b
1 changed files with 30 additions and 10 deletions
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40
gst/shapewipe/gstshapewipe.c
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@ -556,14 +556,24 @@ gst_shape_wipe_blend_16 (GstShapeWipe * self, GstBuffer * inbuf,
guint i, j;
guint mask_increment = GST_ROUND_UP_2 (self->width) - self->width;
gfloat position = self->mask_position;
gfloat low = MAX (0.0, position - (self->mask_border / 2.0));
gfloat high = MIN (1.0, position + (self->mask_border / 2.0));
gfloat low = position - (self->mask_border / 2.0f);
gfloat high = position + (self->mask_border / 2.0f);
if (low < 0.0f) {
high = 0.0f;
low = 0.0f;
}
if (high > 1.0f) {
low = 1.0f;
high = 1.0f;
}
for (i = 0; i < self->height; i++) {
for (j = 0; j < self->width; j++) {
gfloat in = *mask / 65535.0;
gfloat in = *mask / 65535.0f;
if (in <= low) {
if (in < low) {
output[0] = 0x00; /* A */
output[1] = 0x00; /* Y */
output[2] = 0x80; /* U */
@ -574,7 +584,7 @@ gst_shape_wipe_blend_16 (GstShapeWipe * self, GstBuffer * inbuf,
output[2] = input[2]; /* U */
output[3] = input[3]; /* V */
} else {
gfloat val = 255 * ((in - low) / (high - low));
gfloat val = 255.0f * ((in - low) / (high - low));
output[0] = CLAMP (val, 0, 255); /* A */
output[1] = input[1]; /* Y */
@ -602,14 +612,24 @@ gst_shape_wipe_blend_8 (GstShapeWipe * self, GstBuffer * inbuf,
guint i, j;
guint mask_increment = GST_ROUND_UP_4 (self->width) - self->width;
gfloat position = self->mask_position;
gfloat low = MAX (0.0, position - (self->mask_border / 2.0));
gfloat high = MIN (1.0, position + (self->mask_border / 2.0));
gfloat low = position - (self->mask_border / 2.0f);
gfloat high = position + (self->mask_border / 2.0f);
if (low < 0.0f) {
high = 0.0f;
low = 0.0f;
}
if (high > 1.0f) {
low = 1.0f;
high = 1.0f;
}
for (i = 0; i < self->height; i++) {
for (j = 0; j < self->width; j++) {
gfloat in = *mask / 255.0;
gfloat in = *mask / 255.0f;
if (in <= low) {
if (in < low) {
output[0] = 0x00; /* A */
output[1] = 0x00; /* Y */
output[2] = 0x80; /* U */
@ -620,7 +640,7 @@ gst_shape_wipe_blend_8 (GstShapeWipe * self, GstBuffer * inbuf,
output[2] = input[2]; /* U */
output[3] = input[3]; /* V */
} else {
gfloat val = 255 * ((in - low) / (high - low));
gfloat val = 255.0f * ((in - low) / (high - low));
output[0] = CLAMP (val, 0, 255); /* A */
output[1] = input[1]; /* Y */