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image.cpp
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image.cpp
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/** @file image.h Wrapper over QImage.
*
* @authors Copyright (c) 2013-2017 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* @par License
* LGPL: http://www.gnu.org/licenses/lgpl.html
*
* <small>This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at your
* option) any later version. This program is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this program; if not, see:
* http://www.gnu.org/licenses</small>
*/
#include "de/Image"
#include "de/graphics/opengl.h"
#include <de/Block>
#include <de/File>
#include <de/FixedByteArray>
#include <de/Log>
#include <de/Reader>
#include <de/Vector>
#include <de/Writer>
#include <de/Zeroed>
#include <stb/stb_image.h>
#include <stb/stb_image_write.h>
#include <stb/stb_image_resize.h>
namespace de {
static constexpr int JPEG_QUALITY = 85;
#define IMAGE_ASSERT_EDITABLE(d) DE_ASSERT(d->format == RGBA_8888)
namespace internal {
namespace pcx {
static dbyte const MAGIC = 0x0a;
static dbyte const RLE_ENCODING = 1;
static dsize const HEADER_SIZE = 128;
struct Header : public IReadable
{
dbyte magic;
dbyte version;
dbyte encoding;
dbyte bitsPerPixel;
duint16 xMin, yMin;
duint16 xMax, yMax;
duint16 hRes, vRes;
dbyte colorPlanes;
duint16 bytesPerLine;
duint16 paletteType;
void operator << (Reader &from)
{
from >> magic
>> version
>> encoding
>> bitsPerPixel
>> xMin
>> yMin
>> xMax
>> yMax
>> hRes
>> vRes;
from.seek(48); // skip EGA palette
from.seek(1); // skip reserved field
from >> colorPlanes
>> bytesPerLine
>> paletteType;
}
};
static bool recognize(Block const &data)
{
try
{
Header header;
Reader(data) >> header;
// Only paletted format supported.
return (header.magic == MAGIC &&
header.version == 5 /* latest */ &&
header.encoding == RLE_ENCODING &&
header.bitsPerPixel == 8);
}
catch (Error const &)
{
return false;
}
}
/**
* Loads a PCX image into a QImage using an RGB888 buffer. The PCX palette is used
* to map color indices to RGB values.
*
* @param data Source data containing a PCX image.
*
* @return QImage using the RGB888 (24-bit) format.
*/
static Image load(const Block &data)
{
Header header;
Reader reader(data);
reader >> header;
Image::Size const size(header.xMax + 1, header.yMax + 1);
Image image(size, Image::RGB_888);
DE_ASSERT(image.depth() == 24);
dbyte const *palette = data.data() + data.size() - 768;
dbyte const *pos = data.data() + HEADER_SIZE;
dbyte *dst = reinterpret_cast<dbyte *>(image.bits());
for (duint y = 0; y < size.y; ++y, dst += size.x * 3)
{
for (duint x = 0; x < size.x; )
{
dbyte value = *pos++;
// RLE inflation.
int runLength = 1;
if ((value & 0xc0) == 0xc0)
{
runLength = value & 0x3f;
value = *pos++;
}
while (runLength-- > 0)
{
// Get the RGB triplets from the palette.
std::memcpy(&dst[3 * x++], &palette[3 * value], 3);
}
}
}
return image;
}
} // namespace pcx
namespace tga {
struct Header : public IReadable
{
enum Flag
{
NoFlags = 0,
ScreenOriginUpper = 0x1,
InterleaveTwoWay = 0x2,
InterleaveFourWay = 0x4
};
enum ColorMapType
{
ColorMapNone = 0,
ColorMap256 = 1 // not supported
};
enum ImageType
{
RGB = 2, ///< Uncompressed RGB.
RleRGB = 10 ///< Run length encoded RGB.
};
Block identification;
Zeroed<duint8> colorMapType;
Zeroed<duint8> imageType;
// Color map.
Zeroed<dint16> mapIndex;
Zeroed<dint16> mapCount; ///< Number of color map entries.
Zeroed<duint8> mapEntrySize; ///< Bits in a color map entry.
// Image specification.
Flags flags;
Vector2<dint16> origin;
Vector2<dint16> size;
Zeroed<duint8> depth;
Zeroed<duint8> attrib;
void operator << (Reader &from)
{
duint8 identificationSize;
from >> identificationSize
>> colorMapType
>> imageType
>> mapIndex
>> mapCount
>> mapEntrySize
>> origin.x >> origin.y
>> size.x >> size.y
>> depth;
duint8 f;
from >> f;
/*
Flags:
0-3 : Number of attribute bits
4 : reserved
5 : Screen origin in upper left corner
6-7 : Data storage interleave
00 - no interleave
01 - even/odd interleave
10 - four way interleave
11 - reserved
*/
attrib = f & 0x0f;
flags = (f & 0x20? ScreenOriginUpper : NoFlags);
if ((f & 0xc0) == 0x40) flags |= InterleaveTwoWay;
if ((f & 0xc0) == 0x80) flags |= InterleaveFourWay;
from.readBytes(identificationSize, identification);
}
};
static bool recognize(Block const &data)
{
try
{
Header header;
Reader(data) >> header;
return (header.imageType == Header::RGB || header.imageType == Header::RleRGB) &&
header.colorMapType == Header::ColorMapNone &&
(header.depth == 24 || header.depth == 32);
}
catch (...)
{
return false;
}
}
static Image load(const Block &data)
{
Header header;
Reader input(data);
input >> header;
int const pixelSize = header.depth / 8;
Image img(Image::Size(header.size.x, header.size.y),
pixelSize == 4? Image::RGBA_8888 : Image::RGB_888);
dbyte *base = reinterpret_cast<dbyte *>(img.bits());
bool const isUpperOrigin = header.flags.testFlag(Header::ScreenOriginUpper);
// RGB can be read line by line.
if (header.imageType == Header::RGB)
{
for (int y = 0; y < header.size.y; y++)
{
int inY = (isUpperOrigin? y : (header.size.y - y - 1));
ByteRefArray line(base + (inY * img.stride()), header.size.x * pixelSize);
input.readBytesFixedSize(line);
}
}
else if (header.imageType == Header::RleRGB)
{
img.fill(Image::Color());
// RLE packets may cross over to the next line.
int x = 0;
int y = (isUpperOrigin? 0 : (header.size.y - 1));
int endY = header.size.y - y - 1;
int stepY = (isUpperOrigin? 1 : -1);
while (y != endY && x < header.size.x)
{
dbyte rle;
input >> rle;
int count;
bool repeat = false;
if (rle & 0x80) // Repeat?
{
repeat = true;
count = (rle & 0x7f) + 1;
}
else
{
count = rle + 1;
}
Block pixel;
for (int i = 0; i < count; ++i)
{
if (i == 0 || !repeat)
{
// Read the first/next byte.
input.readBytes(pixelSize, pixel);
}
std::memcpy(base + (x + y * header.size.x) * pixelSize,
pixel.constData(), pixelSize);
// Advance the position.
if (++x == header.size.x)
{
x = 0;
y += stepY;
}
}
}
}
if (pixelSize == 3)
{
img = img.rgbSwapped();
}
return img;
}
} // namespace tga
} // namespace internal
using namespace internal;
DE_PIMPL(Image)
{
Format format;
Size size;
Block pixels;
ByteRefArray refPixels;
float pointRatio = 1.f;
Impl(Public *i)
: Base(i)
, format(Unknown)
{}
Impl(Public *i, Impl const &other)
: Base(i)
, format(other.format)
, size(other.size)
, image(other.image)
, pixels(other.pixels)
, refPixels(other.refPixels)
, pointRatio(other.pointRatio)
{}
Impl(Public *i, Size const &imgSize, Format imgFormat)
: Base(i)
, format(imgFormat)
, size(imgSize)
{}
Impl(Public *i, Size const &imgSize, Format imgFormat, IByteArray const &imgPixels)
: Base(i)
, format(imgFormat)
, size(imgSize)
, pixels(imgPixels)
{}
Impl(Public *i, Size const &imgSize, Format imgFormat, ByteRefArray const &imgRefPixels)
: Base(i)
, format(imgFormat)
, size(imgSize)
, refPixels(imgRefPixels)
{}
Rectanglei rect() const
{
return Rectanglei::fromSize(size);
}
};
Image::Image() : d(new Impl(this))
{}
Image::Image(Image const &other)
: d(new Impl(this, *other.d))
{}
Image::Image(Image &&moved)
: d(std::move(moved.d))
{}
Image::Image(Size const &size, Format format)
: d(new Impl(this, size, format))
{
d->pixels.resize(stride() * size.y);
}
Image::Image(Size const &size, Format format, IByteArray const &pixels)
: d(new Impl(this, size, format, pixels))
{}
Image::Image(Size const &size, Format format, ByteRefArray const &refPixels)
: d(new Impl(this, size, format, refPixels))
{}
Image &Image::operator=(const Image &other)
{
d.reset(new Impl(this, *other.d));
return *this;
}
Image &Image::operator=(Image &&moved)
{
std::swap(d, moved.d);
return *this;
}
//Image &Image::operator = (QImage const &other)
//{
// d.reset(new Impl(this, other));
// return *this;
//}
Image::Format Image::format() const
{
return d->format;
}
//QImage::Format Image::qtFormat() const
//{
// if (d->format == UseQImageFormat)
// {
// return d->image.format();
// }
// return QImage::Format_Invalid;
//}
Image::Size Image::size() const
{
return d->size;
}
Rectanglei Image::rect() const
{
return Rectanglei(0, 0, d->size.x, d->size.y);
}
int Image::depth() const
{
switch (d->format)
{
// case UseQImageFormat: return d->image.depth();
case Luminance_8:
case Alpha_8: return 8;
case LuminanceAlpha_88:
case RGB_565:
case RGBA_4444:
case RGBA_5551: return 16;
case RGB_888: return 24;
case RGBA_8888:
case RGBx_8888: return 32;
case R_16f: return 16;
case RG_16f: return 32;
case RGB_16f: return 48;
case RGBA_16f: return 64;
case R_32f:
case R_32i:
case R_32ui: return 32;
case RG_32f:
case RG_32i:
case RG_32ui: return 64;
case RGB_32f:
case RGB_32i:
case RGB_32ui: return 96;
case RGBA_32f:
case RGBA_32i:
case RGBA_32ui: return 128;
default: return 0;
}
}
int Image::stride() const
{
// if (d->format == UseQImageFormat)
// {
// return d->image.bytesPerLine();
// }
return bytesPerPixel() * d->size.x;
}
return depth() / 8 * d->size.x;
}
dsize Image::byteCount() const
{
// if (d->format == UseQImageFormat)
// {
// return d->image.byteCount();
// }
if (!d->pixels.isEmpty())
{
return d->pixels.size();
}
return bytesPerPixel() * d->size.x * d->size.y;
}
const dbyte *Image::bits() const
{
// if (d->format == UseQImageFormat)
// {
// return d->image.constBits();
// }
if (!d->pixels.isEmpty())
{
return d->pixels.constData();
}
return reinterpret_cast<const dbyte *>(d->refPixels.readBase());
}
dbyte *Image::bits()
{
// if (d->format == UseQImageFormat)
// {
// return d->image.bits();
// }
if (!d->pixels.isEmpty())
{
return d->pixels.data();
}
return reinterpret_cast<dbyte *>(d->refPixels.base());
}
const dbyte *Image::row(duint y) const
{
DE_ASSERT(y < height());
return bits() + stride() * y;
}
dbyte *Image::row(duint y)
{
DE_ASSERT(y < height());
return bits() + stride() * y;
}
dbyte *Image::rowEnd(duint y)
{
return row(y) + width() * bytesPerPixel();
}
const duint32 *Image::row32(duint y) const
{
return reinterpret_cast<const duint32 *>(row(y));
}
duint32 *Image::row32(duint y)
{
return reinterpret_cast<duint32 *>(row(y));
}
duint32 *Image::rowEnd32(duint y)
{
return reinterpret_cast<duint32 *>(row(y) + width() * bytesPerPixel());
}
bool Image::isNull() const
{
return size() == Size(0, 0);
}
bool Image::isGLCompatible() const
{
// if (d->format == UseQImageFormat)
// {
// // Some QImage formats are GL compatible.
// switch (qtFormat())
// {
// case QImage::Format_ARGB32: // 8888
// case QImage::Format_RGB32: // 8888
// case QImage::Format_RGB888: // 888
// case QImage::Format_RGB16: // 565
// case QImage::Format_RGB555: // 555
// case QImage::Format_RGB444: // 444
// return true;
// default:
// return false;
// }
// }
return d->format >= Luminance_8 && d->format <= RGBA_32ui;
}
Image Image::convertToFormat(Format toFormat) const
{
if (d->format == toFormat)
{
// No conversion necessary.
return *this;
}
if (d->format == RGB_888 && toFormat == RGBA_8888)
{
const int inStep = bytesPerPixel();
Image conv(size(), toFormat);
for (duint y = 0; y < height(); ++y)
{
const duint8 *in = row(y);
for (duint32 *out = conv.row32(y), *outEnd = conv.rowEnd32(y);
out != outEnd; ++out, in += inStep)
{
*out = packColor(Color(in[0], in[1], in[2], 255));
}
}
return conv;
}
DE_ASSERT_FAIL("Image::convertToFormat not implemented");
}
//bool Image::canConvertToQImage() const
//{
// switch (d->format)
// {
// case RGB_444:
// case RGB_555:
// case RGB_565:
// case RGB_888:
// case RGBA_8888:
// case RGBx_8888:
// case UseQImageFormat:
// return true;
// default:
// return false;
// }
//}
//QImage Image::toQImage() const
//{
// if (d->format == UseQImageFormat)
// {
// return d->image;
// }
// // There may be some conversions we can do.
// QImage::Format form = QImage::Format_Invalid;
// switch (d->format)
// {
// case RGB_444:
// form = QImage::Format_RGB444;
// break;
// case RGB_555:
// form = QImage::Format_RGB555;
// break;
// case RGB_565:
// form = QImage::Format_RGB16;
// break;
// case RGB_888:
// form = QImage::Format_RGB888;
// break;
// case RGBA_8888:
// form = QImage::Format_ARGB32;
// break;
// case RGBx_8888:
// form = QImage::Format_RGB32;
// break;
// default:
// // Cannot be done.
// return QImage();
// }
// QImage img(QSize(d->size.x, d->size.y), form);
// std::memcpy(const_cast<uchar *>(img.constBits()), bits(), byteCount());
// return img;
//}
GLPixelFormat Image::glFormat() const
{
// if (d->format == UseQImageFormat)
// {
// return glFormat(d->image.format());
// }
return glFormat(d->format);
}
Image::Color Image::pixel(Vec2ui pos) const
{
const dbyte *ptr = &row(pos.y)[pos.x * bytesPerPixel()];
switch (d->format)
{
case RGBA_8888: return Color(ptr[0], ptr[1], ptr[2], ptr[3]);
case RGB_888: return Color(ptr[0], ptr[1], ptr[2]);
default: DE_ASSERT_FAIL("Image::pixel does not support this format"); break;
}
return {};
}
void Image::setPointRatio(float pointsPerPixel)
{
d->pointRatio = pointsPerPixel;
}
Image Image::subImage(Rectanglei const &subArea) const
{
const auto bounds = d->rect() & subArea;
Image sub(bounds.size(), d->format);
for (duint y = 0; y < bounds.height(); ++y)
{
memcpy(sub.row(y), row(bounds.top() + y), bounds.width() * bytesPerPixel());
}
return sub;
}
void Image::resize(Size const &size)
{
IMAGE_ASSERT_EDITABLE(d);
// DE_ASSERT(d->image.format() != QImage::Format_Invalid);
Image resized{size, d->format};
stbir_resize_uint8(bits(),
width(),
height(),
stride(),
resized.bits(),
size.x,
size.y,
resized.stride(),
bytesPerPixel());
*this = resized;
}
void Image::fill(Color color)
{
IMAGE_ASSERT_EDITABLE(d);
const duint32 colorBits = packColor(color);
for (duint y = 0; y < height(); ++y)
{
for (duint32 *i = row32(y), *end = rowEnd32(y); i != end; ++i)
{
*i = colorBits;
}
}
}
void Image::fill(Rectanglei const &rect, Color color)
{
IMAGE_ASSERT_EDITABLE(d);
const Rectanglei bounds = d->rect() & rect;
const duint32 colorBits = packColor(color);
for (int y = bounds.top(); y < bounds.bottom(); ++y)
{
auto *rowStart = row32(y) + bounds.left();
auto *end = rowStart + bounds.width();
for (duint32 *i = rowStart; i != end; ++i)
{
*i = colorBits;
}
}
}
void Image::setPixel(Vec2ui pos, Color color)
{
IMAGE_ASSERT_EDITABLE(d);
uint32_t packed = packColor(color);
std::memcpy(&row(pos.y)[bytesPerPixel() * pos.x], &packed, 4);
}
void Image::drawRect(const Rectanglei &rect, Color color)
{
IMAGE_ASSERT_EDITABLE(d);
if (rect.isNull()) return;
const duint32 packed = packColor(color);
duint32 *top = row32(rect.top()) + rect.left();
duint32 *bottom = row32(rect.bottom() - 1) + rect.left();
for (duint x = 0; x < rect.width(); ++x)
{
*top++ = packed;
*bottom++ = packed;
}
const int stride32 = stride() / 4;
duint32 *left = row32(rect.top() + 1) + rect.left();
duint32 *right = row32(rect.top() + 1) + (rect.right() - 1);
for (duint y = 0; y < rect.height() - 2; ++y)
{
*left = *right = packed;
left += stride32;
right += stride32;
}
}
void Image::draw(Image const &image, Vec2i const &topLeft)
{
drawPartial(image, image.d->rect(), topLeft);
}
void Image::drawPartial(Image const &image, Rectanglei const &part, Vec2i const &topLeft)
{
DE_ASSERT(d->format == image.d->format); // conversion not supported
IMAGE_ASSERT_EDITABLE(d);
IMAGE_ASSERT_EDITABLE(image.d);
const auto srcPart = image.d->rect() & part;
const auto bounds = Rectanglei(topLeft, topLeft + srcPart.size().toVec2i());
const auto destRect = d->rect() & bounds;
const auto srcRect = destRect.moved(-topLeft);
if (srcRect.isNull()) return;
DE_ASSERT(srcRect.size() == destRect.size());
for (int dy = destRect.top(), sy = srcRect.top(); sy < srcRect.bottom(); ++dy, ++sy)
{
memcpy(row32(dy) + destRect.left(),
image.row32(sy) + srcRect.left(),
srcRect.width() * bytesPerPixel());
}
}
Image Image::multiplied(const Image &factorImage) const
{
IMAGE_ASSERT_EDITABLE(factorImage.d);
const auto bounds = d->rect() & factorImage.d->rect();
Image multiplied = convertToFormat(RGBA_8888);
for (duint y = 0; y < bounds.height(); ++y)
{
const duint32 *src1 = row32(y);
const duint32 *end = src1 + bounds.width();
const duint32 *src2 = factorImage.row32(y);
for (duint32 *dest = multiplied.row32(y); src1 != end; ++src1, ++src2, ++dest)
{
const Color16 col1 = unpackColor16(*src1);
const Color16 col2 = unpackColor16(*src2);
*dest = packColor(Color16((col2.x + 1) * col1.x >> 8,
(col2.y + 1) * col1.y >> 8,
(col2.z + 1) * col1.z >> 8,
(col2.w + 1) * col1.w >> 8));
}
}
return multiplied;
}
Image Image::multiplied(Color color) const
{
if (color == Color(255, 255, 255, 255)) return *this; // No change.
Image copy = convertToFormat(RGBA_8888);
for (duint y = 0; y < height(); ++y)
{
duint32 *ptr = reinterpret_cast<duint32 *>(copy.bits() + y * copy.stride());
for (duint x = 0; x < width(); ++x)
{
const Color16 pix = unpackColor16(*ptr);
*ptr++ = packColor(Color16((color.x + 1) * pix.x >> 8,
(color.y + 1) * pix.y >> 8,
(color.z + 1) * pix.z >> 8,
(color.w + 1) * pix.w >> 8));
}
}
return copy;
}
Image Image::colorized(Color color) const
{
const float targetHue = hsv(color).x;
Image copy = convertToFormat(RGBA_8888);
for (duint y = 0; y < height(); ++y)
{
for (duint32 *ptr = copy.row32(y), *end = ptr + width(); ptr != end; ++ptr)
{
Vec4f pixelHsv = hsv(unpackColor(*ptr));
pixelHsv.x = targetHue;
pixelHsv.w = (color.w / 255.f) * pixelHsv.w;
*ptr = packColor(fromHsv(pixelHsv));
}
}
return copy;
}
Image Image::invertedColor() const
{
Image img = convertToFormat(RGBA_8888);
for (duint y = 0; y < height(); ++y)
{
for (duint32 *ptr = img.row32(y), *end = ptr + width(); ptr != end; ++ptr)
{
const auto color = unpackColor(*ptr);
*ptr = packColor(Color(255 - color.x, 255 - color.y, 255 - color.z, color.w));
}
}
return img;
}
Image Image::mixed(Image const &low, Image const &high) const
{
DE_ASSERT(size() == low.size());
DE_ASSERT(size() == high.size());
const Image &lowImg = low;
const Image &highImg = high;
Image mix = convertToFormat(RGBA_8888);
for (duint y = 0; y < height(); ++y)
{
duint32 *ptr = mix.row32(y);
for (duint x = 0; x < width(); ++x)
{
const auto pix = unpackColor(*ptr);
const duint mr = pix.x;
const duint mg = pix.y;
const duint mb = pix.z;
const duint ma = pix.w;
const auto lowColor = lowImg .pixel(x, y);
const auto highColor = highImg.pixel(x, y);
int red = (highColor.x * mr + lowColor.x * (255 - mr)) / 255;
int green = (highColor.y * mg + lowColor.y * (255 - mg)) / 255;
int blue = (highColor.z * mb + lowColor.z * (255 - mb)) / 255;
int alpha = (highColor.w * ma + lowColor.w * (255 - ma)) / 255;
*ptr = packColor(makeColor(red, green, blue, alpha));
ptr++;
}
}
return mix;
}
Image Image::withAlpha(Image const &grayscale) const
{
DE_ASSERT(size() == grayscale.size());
const Image &alpha = grayscale;
Image img = convertToFormat(RGBA_8888);
for (duint y = 0; y < height(); ++y)
{
duint32 *ptr = img.row32(y);
for (duint x = 0; x < width(); ++x)
{
*ptr &= 0x00ffffff;
*ptr++ |= alpha.pixel(x, y).x << 24;
}
}
return img;
}
Image Image::rgbSwapped() const
{
DE_ASSERT_FAIL("Image::rgbSwapped is not implemented");
return {};
}
Image Image::flipped() const
{
Image flip(d->size, d->format);
for (duint y = 0; y < height(); ++y)
{
memcpy(flip.row(y), row(height() - 1 - y), stride());
}
return flip;
}
Image Image::solidColor(Color color, Size const &size)
{
Image img(size, Image::RGBA_8888);
img.fill(color);
return img;
}
void Image::save(const NativePath &path) const
{
DE_ASSERT(d->format == RGBA_8888 || d->format == RGB_888 ||
d->format == Luminance_8 || d->format == LuminanceAlpha_88);
const String ext = path.toString().fileNameExtension();
const int comp = d->format == RGBA_8888 ? 4