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Port invert, jpeg, and mirror

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This commit is contained in:
Essem 2022-02-27 15:37:51 -06:00
parent 112f15e9f2
commit 4a3d880a61
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GPG key ID: 7D497397CC3A2A8C
3 changed files with 111 additions and 135 deletions
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50
natives/invert.cc
View file

@ -1,11 +1,11 @@
#include <Magick++.h>
#include <napi.h>
#include <iostream>
#include <list>
#include <vips/vips8>
using namespace std;
using namespace Magick;
using namespace vips;
Napi::Value Invert(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env();
@ -17,43 +17,29 @@ Napi::Value Invert(const Napi::CallbackInfo &info) {
int delay =
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
Blob blob;
VOption *options = VImage::option()->set("access", "sequential");
list<Image> frames;
list<Image> coalesced;
list<Image> mid;
try {
readImages(&frames, Blob(data.Data(), data.Length()));
} catch (Magick::WarningCoder &warning) {
cerr << "Coder Warning: " << warning.what() << endl;
} catch (Magick::Warning &warning) {
cerr << "Warning: " << warning.what() << endl;
}
coalesceImages(&coalesced, frames.begin(), frames.end());
VImage in =
VImage::new_from_buffer(data.Data(), data.Length(), "",
type == "gif" ? options->set("n", -1) : options)
.colourspace(VIPS_INTERPRETATION_sRGB);
if (!in.has_alpha()) in = in.bandjoin(255);
for_each(coalesced.begin(), coalesced.end(), negateImage());
for (Image &image : coalesced) {
image.negateChannel(Magick::AlphaChannel);
mid.push_back(image);
}
// Magick::ChannelType(Magick::CompositeChannels ^ Magick::AlphaChannel)
for_each(mid.begin(), mid.end(), magickImage(type));
VImage noAlpha =
in.extract_band(0, VImage::option()->set("n", in.bands() - 1));
VImage inverted = noAlpha.invert();
VImage out = inverted.bandjoin(in.extract_band(3));
optimizeTransparency(mid.begin(), mid.end());
if (delay) out.set("delay", delay);
if (type == "gif") {
for (Image &image : mid) {
image.quantizeDitherMethod(FloydSteinbergDitherMethod);
image.quantize();
if (delay != 0) image.animationDelay(delay);
}
}
void *buf;
size_t length;
out.write_to_buffer(("." + type).c_str(), &buf, &length);
writeImages(mid.begin(), mid.end(), &blob);
vips_thread_shutdown();
Napi::Object result = Napi::Object::New(env);
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
blob.length()));
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
result.Set("type", type);
return result;
} catch (std::exception const &err) {

87
natives/jpeg.cc
View file

@ -1,11 +1,11 @@
#include <Magick++.h>
#include <napi.h>
#include <iostream>
#include <list>
#include <vips/vips8>
using namespace std;
using namespace Magick;
using namespace vips;
Napi::Value Jpeg(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env();
@ -13,61 +13,62 @@ Napi::Value Jpeg(const Napi::CallbackInfo &info) {
try {
Napi::Object obj = info[0].As<Napi::Object>();
Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
int quality =
obj.Has("quality") ? obj.Get("quality").As<Napi::Number>().Int32Value() : 0;
int quality = obj.Has("quality")
? obj.Get("quality").As<Napi::Number>().Int32Value()
: 0;
string type = obj.Get("type").As<Napi::String>().Utf8Value();
int delay =
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
Blob blob;
Napi::Object result = Napi::Object::New(env);
if (type == "gif") {
list<Image> frames;
list<Image> coalesced;
list<Image> jpeged;
try {
readImages(&frames, Blob(data.Data(), data.Length()));
} catch (Magick::WarningCoder &warning) {
cerr << "Coder Warning: " << warning.what() << endl;
} catch (Magick::Warning &warning) {
cerr << "Warning: " << warning.what() << endl;
VImage in =
VImage::new_from_buffer(
data.Data(), data.Length(), "",
VImage::option()->set("access", "sequential")->set("n", -1))
.colourspace(VIPS_INTERPRETATION_sRGB);
if (!in.has_alpha()) in = in.bandjoin(255);
int width = in.width();
int page_height = vips_image_get_page_height(in.get_image());
int n_pages = vips_image_get_n_pages(in.get_image());
vector<VImage> img;
for (int i = 0; i < n_pages; i++) {
VImage img_frame = in.crop(0, i * page_height, width, page_height);
void *buf;
size_t length;
img_frame.write_to_buffer(
".jpg", &buf, &length,
VImage::option()->set("Q", quality)->set("strip", true));
VImage jpeg = VImage::new_from_buffer(buf, length, "");
img.push_back(jpeg);
}
coalesceImages(&coalesced, frames.begin(), frames.end());
VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
final.set(VIPS_META_PAGE_HEIGHT, page_height);
if (delay) final.set("delay", delay);
for (Image &image : coalesced) {
Blob temp;
image.quality(quality);
image.magick("JPEG");
image.write(&temp);
Image newImage(temp);
newImage.magick(type);
newImage.animationDelay(delay == 0 ? image.animationDelay() : delay);
jpeged.push_back(newImage);
}
void *buf;
size_t length;
final.write_to_buffer(("." + type).c_str(), &buf, &length,
VImage::option()->set("dither", 0));
optimizeTransparency(jpeged.begin(), jpeged.end());
vips_thread_shutdown();
for (Image &image : jpeged) {
image.quantizeDither(false);
image.quantize();
}
writeImages(jpeged.begin(), jpeged.end(), &blob);
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
blob.length()));
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
result.Set("type", type);
} else {
Image image;
image.read(Blob(data.Data(), data.Length()));
image.quality(1);
image.magick("JPEG");
image.write(&blob);
VImage in = VImage::new_from_buffer(data.Data(), data.Length(), "");
void *buf;
size_t length;
in.write_to_buffer(
".jpg", &buf, &length,
VImage::option()->set("Q", quality)->set("strip", true));
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
blob.length()));
vips_thread_shutdown();
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
result.Set("type", "jpg");
}

109
natives/mirror.cc
View file

@ -1,11 +1,11 @@
#include <Magick++.h>
#include <napi.h>
#include <iostream>
#include <list>
#include <vips/vips8>
using namespace std;
using namespace Magick;
using namespace vips;
Napi::Value Mirror(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env();
@ -22,74 +22,63 @@ Napi::Value Mirror(const Napi::CallbackInfo &info) {
int delay =
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
Blob blob;
VOption *options = VImage::option()->set("access", "sequential");
list<Image> frames;
list<Image> coalesced;
list<Image> mid;
MagickCore::GravityType gravity;
try {
readImages(&frames, Blob(data.Data(), data.Length()));
} catch (Magick::WarningCoder &warning) {
cerr << "Coder Warning: " << warning.what() << endl;
} catch (Magick::Warning &warning) {
cerr << "Warning: " << warning.what() << endl;
}
coalesceImages(&coalesced, frames.begin(), frames.end());
VImage in =
VImage::new_from_buffer(data.Data(), data.Length(), "",
type == "gif" ? options->set("n", -1) : options)
.colourspace(VIPS_INTERPRETATION_sRGB);
if (!in.has_alpha()) in = in.bandjoin(255);
if (vertical && first) {
gravity = Magick::NorthGravity;
} else if (!vertical && first) {
gravity = Magick::WestGravity;
} else if (vertical && !first) {
gravity = Magick::SouthGravity;
VImage out;
if (vertical) {
if (type == "gif") {
// once again, libvips gif handling is both a blessing and a curse
vector<VImage> img;
int page_height = vips_image_get_page_height(in.get_image());
int n_pages = vips_image_get_n_pages(in.get_image());
bool isOdd = page_height % 2;
for (int i = 0; i < n_pages; i++) {
int x = (i * page_height) + (first ? 0 : (page_height / 2));
VImage cropped = in.crop(0, x, in.width(), page_height / 2);
VImage flipped = cropped.flip(VIPS_DIRECTION_VERTICAL);
VImage final = VImage::arrayjoin(
{first ? cropped : flipped, first ? flipped : cropped},
VImage::option()->set("across", 1));
img.push_back(final);
}
out = VImage::arrayjoin(img, VImage::option()->set("across", 1));
out.set(VIPS_META_PAGE_HEIGHT, page_height - (isOdd ? 1 : 0));
} else {
VImage cropped = in.extract_area(0, 0, in.width(), in.height() / 2);
VImage flipped = cropped.flip(VIPS_DIRECTION_VERTICAL);
out = VImage::arrayjoin({cropped, flipped},
VImage::option()->set("across", 1));
}
} else {
gravity = Magick::EastGravity;
}
for (Image &image : coalesced) {
image.colorSpace(Magick::sRGBColorspace);
list<Image> mirrored;
Image final;
image.extent(Geometry(to_string(vertical ? image.baseColumns()
: image.baseColumns() / 2) +
"x" +
to_string(vertical ? image.baseRows() / 2
: image.baseRows())),
gravity);
mirrored.push_back(image);
Image mirror = image;
if (vertical) {
mirror.flip();
} else {
mirror.flop();
}
if (first) {
mirrored.push_back(mirror);
VImage cropped = in.extract_area(0, 0, in.width() / 2, in.height());
VImage flipped = cropped.flip(VIPS_DIRECTION_HORIZONTAL);
out = VImage::arrayjoin({cropped, flipped});
} else {
mirrored.push_front(mirror);
}
appendImages(&final, mirrored.begin(), mirrored.end(), vertical);
final.repage();
final.magick(type);
final.animationDelay(delay == 0 ? image.animationDelay() : delay);
mid.push_back(final);
}
optimizeTransparency(mid.begin(), mid.end());
if (type == "gif") {
for (Image &image : mid) {
image.quantizeDither(false);
image.quantize();
int size = in.width() / 2;
VImage cropped = in.extract_area(size, 0, size, in.height());
VImage flipped = cropped.flip(VIPS_DIRECTION_HORIZONTAL);
out = VImage::arrayjoin({flipped, cropped});
}
}
writeImages(mid.begin(), mid.end(), &blob);
if (delay) out.set("delay", delay);
void *buf;
size_t length;
out.write_to_buffer(("." + type).c_str(), &buf, &length);
vips_thread_shutdown();
Napi::Object result = Napi::Object::New(env);
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
blob.length()));
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
result.Set("type", type);
return result;
} catch (std::exception const &err) {