diff options
| author | Carl Hetherington <cth@carlh.net> | 2024-01-29 11:38:39 +0100 |
|---|---|---|
| committer | Carl Hetherington <cth@carlh.net> | 2024-02-03 09:57:25 +0100 |
| commit | cf7df384d7698c0d75342e02b7efdbacf8611398 (patch) | |
| tree | 4b9b6ef872529602d9ca2edaf5ad5a089866e47a /src/lib | |
| parent | 0403a4954ea84ace43c4248aae89af9a6384d7b2 (diff) | |
Fix incorrect alpha step used for RGBA64 sources.
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/image.cc | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/src/lib/image.cc b/src/lib/image.cc index 4042d5886..98c52c8e0 100644 --- a/src/lib/image.cc +++ b/src/lib/image.cc @@ -673,6 +673,7 @@ struct OtherYUVParams uint8_t* const* alpha_data; int const* alpha_stride; + int alpha_bpp; }; @@ -816,7 +817,7 @@ alpha_blend_onto_yuv420p(TargetParams const& target, OtherYUVParams const& other uint8_t* oY = other.data[0] + (oy * other.stride[0]) + other.start_x; uint8_t* oU = other.data[1] + (hoy * other.stride[1]) + other.start_x / 2; uint8_t* oV = other.data[2] + (hoy * other.stride[2]) + other.start_x / 2; - uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * 4; + uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * other.alpha_bpp; for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) { float const a = float(alpha[3]) / 255; *tY = *oY * a + *tY * (1 - a); @@ -832,7 +833,7 @@ alpha_blend_onto_yuv420p(TargetParams const& target, OtherYUVParams const& other ++oU; ++oV; } - alpha += 4; + alpha += other.alpha_bpp; } } } @@ -853,7 +854,7 @@ alpha_blend_onto_yuv420p10(TargetParams const& target, OtherYUVParams const& oth uint16_t* oY = reinterpret_cast<uint16_t*>(other.data[0] + (oy * other.stride[0])) + other.start_x; uint16_t* oU = reinterpret_cast<uint16_t*>(other.data[1] + (hoy * other.stride[1])) + other.start_x / 2; uint16_t* oV = reinterpret_cast<uint16_t*>(other.data[2] + (hoy * other.stride[2])) + other.start_x / 2; - uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * 4; + uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * other.alpha_bpp; for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) { float const a = float(alpha[3]) / 255; *tY = *oY * a + *tY * (1 - a); @@ -869,7 +870,7 @@ alpha_blend_onto_yuv420p10(TargetParams const& target, OtherYUVParams const& oth ++oU; ++oV; } - alpha += 4; + alpha += other.alpha_bpp; } } } @@ -888,7 +889,7 @@ alpha_blend_onto_yuv422p9or10le(TargetParams const& target, OtherYUVParams const uint16_t* oY = reinterpret_cast<uint16_t*>(other.data[0] + (oy * other.stride[0])) + other.start_x; uint16_t* oU = reinterpret_cast<uint16_t*>(other.data[1] + (oy * other.stride[1])) + other.start_x / 2; uint16_t* oV = reinterpret_cast<uint16_t*>(other.data[2] + (oy * other.stride[2])) + other.start_x / 2; - uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * 4; + uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * other.alpha_bpp; for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) { float const a = float(alpha[3]) / 255; *tY = *oY * a + *tY * (1 - a); @@ -904,7 +905,7 @@ alpha_blend_onto_yuv422p9or10le(TargetParams const& target, OtherYUVParams const ++oU; ++oV; } - alpha += 4; + alpha += other.alpha_bpp; } } } @@ -963,7 +964,8 @@ Image::alpha_blend (shared_ptr<const Image> other, Position<int> position) other->data(), other->stride(), nullptr, - nullptr + nullptr, + other->pixel_format() == AV_PIX_FMT_RGBA64BE ? 8 : 4 }; auto byteswap = [](uint16_t* p) { |