diff options
Diffstat (limited to 'src/lib/image.cc')
| -rw-r--r-- | src/lib/image.cc | 53 |
1 files changed, 32 insertions, 21 deletions
diff --git a/src/lib/image.cc b/src/lib/image.cc index d083cf3f6..926aefd36 100644 --- a/src/lib/image.cc +++ b/src/lib/image.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2012 Carl Hetherington <cth@carlh.net> + Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -30,6 +30,7 @@ extern "C" { #include "image.h" #include "exceptions.h" #include "scaler.h" +#include "timer.h" #include "i18n.h" @@ -38,7 +39,7 @@ using std::min; using std::cout; using std::cerr; using boost::shared_ptr; -using libdcp::Size; +using dcp::Size; int Image::line_factor (int n) const @@ -82,7 +83,7 @@ Image::components () const /** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size' */ shared_ptr<Image> -Image::crop_scale_window (Crop crop, libdcp::Size inter_size, libdcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const +Image::crop_scale_window (Crop crop, dcp::Size inter_size, dcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const { assert (scaler); /* Empirical testing suggests that sws_scale() will crash if @@ -98,13 +99,13 @@ Image::crop_scale_window (Crop crop, libdcp::Size inter_size, libdcp::Size out_s out->make_black (); /* Size of the image after any crop */ - libdcp::Size const cropped_size = crop.apply (size ()); + dcp::Size const cropped_size = crop.apply (size ()); /* Scale context for a scale from cropped_size to inter_size */ struct SwsContext* scale_context = sws_getContext ( - cropped_size.width, cropped_size.height, pixel_format(), - inter_size.width, inter_size.height, out_format, - scaler->ffmpeg_id (), 0, 0, 0 + cropped_size.width, cropped_size.height, pixel_format(), + inter_size.width, inter_size.height, out_format, + scaler->ffmpeg_id (), 0, 0, 0 ); if (!scale_context) { @@ -138,7 +139,7 @@ Image::crop_scale_window (Crop crop, libdcp::Size inter_size, libdcp::Size out_s } shared_ptr<Image> -Image::scale (libdcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const +Image::scale (dcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const { assert (scaler); /* Empirical testing suggests that sws_scale() will crash if @@ -169,7 +170,7 @@ Image::scale (libdcp::Size out_size, Scaler const * scaler, AVPixelFormat out_fo shared_ptr<Image> Image::crop (Crop crop, bool aligned) const { - libdcp::Size cropped_size = crop.apply (size ()); + dcp::Size cropped_size = crop.apply (size ()); shared_ptr<Image> out (new Image (pixel_format(), cropped_size, aligned)); for (int c = 0; c < components(); ++c) { @@ -344,8 +345,18 @@ Image::make_black () void Image::alpha_blend (shared_ptr<const Image> other, Position<int> position) { - /* Only implemented for RGBA onto RGB24 so far */ - assert (_pixel_format == PIX_FMT_RGB24 && other->pixel_format() == PIX_FMT_RGBA); + int this_bpp = 0; + int other_bpp = 0; + + if (_pixel_format == PIX_FMT_BGRA && other->pixel_format() == PIX_FMT_RGBA) { + this_bpp = 4; + other_bpp = 4; + } else if (_pixel_format == PIX_FMT_RGB24 && other->pixel_format() == PIX_FMT_RGBA) { + this_bpp = 3; + other_bpp = 4; + } else { + assert (false); + } int start_tx = position.x; int start_ox = 0; @@ -364,15 +375,15 @@ Image::alpha_blend (shared_ptr<const Image> other, Position<int> position) } for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) { - uint8_t* tp = data()[0] + ty * stride()[0] + position.x * 3; + uint8_t* tp = data()[0] + ty * stride()[0] + position.x * this_bpp; uint8_t* op = other->data()[0] + oy * other->stride()[0]; for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) { float const alpha = float (op[3]) / 255; tp[0] = (tp[0] * (1 - alpha)) + op[0] * alpha; tp[1] = (tp[1] * (1 - alpha)) + op[1] * alpha; tp[2] = (tp[2] * (1 - alpha)) + op[2] * alpha; - tp += 3; - op += 4; + tp += this_bpp; + op += other_bpp; } } } @@ -456,8 +467,8 @@ Image::bytes_per_pixel (int c) const * @param p Pixel format. * @param s Size in pixels. */ -Image::Image (AVPixelFormat p, libdcp::Size s, bool aligned) - : libdcp::Image (s) +Image::Image (AVPixelFormat p, dcp::Size s, bool aligned) + : dcp::Image (s) , _pixel_format (p) , _aligned (aligned) { @@ -494,7 +505,7 @@ Image::allocate () } Image::Image (Image const & other) - : libdcp::Image (other) + : dcp::Image (other) , _pixel_format (other._pixel_format) , _aligned (other._aligned) { @@ -512,7 +523,7 @@ Image::Image (Image const & other) } Image::Image (AVFrame* frame) - : libdcp::Image (libdcp::Size (frame->width, frame->height)) + : dcp::Image (dcp::Size (frame->width, frame->height)) , _pixel_format (static_cast<AVPixelFormat> (frame->format)) , _aligned (true) { @@ -531,7 +542,7 @@ Image::Image (AVFrame* frame) } Image::Image (shared_ptr<const Image> other, bool aligned) - : libdcp::Image (other) + : dcp::Image (other) , _pixel_format (other->_pixel_format) , _aligned (aligned) { @@ -564,7 +575,7 @@ Image::operator= (Image const & other) void Image::swap (Image & other) { - libdcp::Image::swap (other); + dcp::Image::swap (other); std::swap (_pixel_format, other._pixel_format); @@ -607,7 +618,7 @@ Image::stride () const return _stride; } -libdcp::Size +dcp::Size Image::size () const { return _size; |