diff options
| author | Stanislaw Halik <sthalik@misaki.pl> | 2017-04-18 04:09:34 +0200 |
|---|---|---|
| committer | Stanislaw Halik <sthalik@misaki.pl> | 2017-04-18 04:20:00 +0200 |
| commit | 47a0d65019e0b3bbf3bad1935ff36c8eb1d9dc2c (patch) | |
| tree | 2397c6b52bcc27d18edb5b132241f9119a2cfaaa | |
| parent | 1d3ce15b2c73eac7c3ef0578007c1ba7c53a7ebe (diff) | |
pose-widget: also compute alpha in the loop
| -rw-r--r-- | pose-widget/pose-widget.cpp | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/pose-widget/pose-widget.cpp b/pose-widget/pose-widget.cpp index 24bf19cd..976bd981 100644 --- a/pose-widget/pose-widget.cpp +++ b/pose-widget/pose-widget.cpp @@ -318,30 +318,27 @@ void pose_transform::project_quad_texture() const unsigned orig_pos__ = py * orig_pitch + px_ * orig_depth; const unsigned orig_pos___ = py_ * orig_pitch + px * orig_depth; - const uc a1 = orig[orig_pos + 3]; - const uc a2 = orig[orig_pos_ + 3]; - const uc a3 = orig[orig_pos__ + 3]; - const uc a4 = orig[orig_pos___ + 3]; - // 1, 0 -- ax_, ay // 0, 1 -- ax, ay_ // 1, 1 -- ax_, ay_ // 0, 0 -- ax, ay - const uc alpha = (a1 * ax + a3 * ax_) * ay + (a4 * ax + a2 * ax_) * ay_; + //const uc alpha = (a1 * ax + a3 * ax_) * ay + (a4 * ax + a2 * ax_) * ay_; const unsigned pos = y * dest_pitch + x * dest_depth; - for (unsigned k = 0; k < 3; k++) + for (int k = 0; k < 4; k++) { const uc i = orig[orig_pos + k]; const uc i_ = orig[orig_pos_ + k]; const uc i__ = orig[orig_pos__ + k]; const uc i___ = orig[orig_pos___ + k]; - dest[pos + k] = unsigned((i * ax + i__ * ax_) * ay + (i___ * ax + i_ * ax_) * ay_)*alpha / 255; + dest[pos + k] = uc((i * ax + i__ * ax_) * ay + (i___ * ax + i_ * ax_) * ay_); } - dest[pos + 3] = alpha; + // premultiply alpha + for (int k = 0; k < 3; k++) + dest[pos + k] = (dest[pos+k]*num(dest[pos + 3]))/255; } } |