1281 lines
34 KiB
C++
1281 lines
34 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#include "ui/image/image_prepare.h"
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#include "ui/effects/animation_value.h"
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#include "ui/style/style_core.h"
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#include "ui/painter.h"
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#include "base/flat_map.h"
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#include "base/debug_log.h"
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#include "base/bytes.h"
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#include "styles/palette.h"
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#include "styles/style_basic.h"
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#include <zlib.h>
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#include <QtCore/QFile>
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#include <QtCore/QBuffer>
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#include <QtCore/QMutex>
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#include <QtGui/QImageReader>
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#include <QtSvg/QSvgRenderer>
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#include <jpeglib.h>
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#include <setjmp.h>
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struct my_error_mgr : public jpeg_error_mgr {
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jmp_buf setjmp_buffer;
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};
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extern "C" {
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static void my_error_exit(j_common_ptr cinfo) {
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my_error_mgr* myerr = (my_error_mgr*)cinfo->err;
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longjmp(myerr->setjmp_buffer, 1);
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}
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} // extern "C"
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namespace Images {
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namespace {
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// They should be smaller.
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constexpr auto kMaxGzipFileSize = 5 * 1024 * 1024;
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TG_FORCE_INLINE uint64 BlurGetColors(const uchar *p) {
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return (uint64)p[0]
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+ ((uint64)p[1] << 16)
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+ ((uint64)p[2] << 32)
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+ ((uint64)p[3] << 48);
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}
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const QImage &CircleMask(QSize size) {
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const auto key = (uint64(uint32(size.width())) << 32)
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| uint64(uint32(size.height()));
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static auto Masks = base::flat_map<uint64, QImage>();
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static auto Mutex = QMutex();
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auto lock = QMutexLocker(&Mutex);
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const auto i = Masks.find(key);
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if (i != end(Masks)) {
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return i->second;
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}
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lock.unlock();
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auto mask = QImage(
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size,
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QImage::Format_ARGB32_Premultiplied);
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mask.fill(Qt::transparent);
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{
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QPainter p(&mask);
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PainterHighQualityEnabler hq(p);
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p.setBrush(Qt::white);
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p.setPen(Qt::NoPen);
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p.drawEllipse(QRect(QPoint(), size));
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}
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lock.relock();
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return Masks.emplace(key, std::move(mask)).first->second;
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}
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std::array<QImage, 4> PrepareCornersMask(int radius) {
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auto result = std::array<QImage, 4>();
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const auto side = radius * style::DevicePixelRatio();
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auto full = QImage(
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QSize(side, side) * 3,
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QImage::Format_ARGB32_Premultiplied);
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full.fill(Qt::transparent);
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{
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QPainter p(&full);
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PainterHighQualityEnabler hq(p);
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p.setPen(Qt::NoPen);
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p.setBrush(Qt::white);
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p.drawRoundedRect(0, 0, side * 3, side * 3, side, side);
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}
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result[0] = full.copy(0, 0, side, side);
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result[1] = full.copy(side * 2, 0, side, side);
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result[2] = full.copy(0, side * 2, side, side);
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result[3] = full.copy(side * 2, side * 2, side, side);
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for (auto &image : result) {
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image.setDevicePixelRatio(style::DevicePixelRatio());
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}
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return result;
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}
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template <int kBits> // 4 means 16x16, 3 means 8x8
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[[nodiscard]] QImage DitherGeneric(const QImage &image) {
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static_assert(kBits >= 1 && kBits <= 4);
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constexpr auto kSquareSide = (1 << kBits);
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constexpr auto kShift = kSquareSide / 2;
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constexpr auto kMask = (kSquareSide - 1);
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const auto width = image.width();
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const auto height = image.height();
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const auto area = width * height;
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const auto shifts = std::make_unique<uchar[]>(area);
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bytes::set_random(bytes::make_span(shifts.get(), area));
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// shiftx = int(shift & kMask) - kShift;
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// shifty = int((shift >> 4) & kMask) - kShift;
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// Clamp shifts close to edges.
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for (auto y = 0; y != kShift; ++y) {
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const auto min = kShift - y;
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const auto shifted = (min << 4);
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auto shift = shifts.get() + y * width;
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for (const auto till = shift + width; shift != till; ++shift) {
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if (((*shift >> 4) & kMask) < min) {
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*shift = shifted | (*shift & 0x0F);
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}
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}
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}
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for (auto y = height - (kShift - 1); y != height; ++y) {
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const auto max = kShift + (height - y - 1);
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const auto shifted = (max << 4);
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auto shift = shifts.get() + y * width;
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for (const auto till = shift + width; shift != till; ++shift) {
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if (((*shift >> 4) & kMask) > max) {
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*shift = shifted | (*shift & 0x0F);
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}
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}
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}
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for (auto shift = shifts.get(), ytill = shift + area
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; shift != ytill
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; shift += width - kShift) {
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for (const auto till = shift + kShift; shift != till; ++shift) {
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const auto min = (till - shift);
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if ((*shift & kMask) < min) {
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*shift = (*shift & 0xF0) | min;
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}
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}
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}
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for (auto shift = shifts.get(), ytill = shift + area; shift != ytill;) {
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shift += width - (kShift - 1);
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for (const auto till = shift + (kShift - 1); shift != till; ++shift) {
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const auto max = kShift + (till - shift - 1);
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if ((*shift & kMask) > max) {
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*shift = (*shift & 0xF0) | max;
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}
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}
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}
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auto result = image;
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result.detach();
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const auto src = reinterpret_cast<const uint32*>(image.constBits());
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const auto dst = reinterpret_cast<uint32*>(result.bits());
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for (auto index = 0; index != area; ++index) {
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const auto shift = shifts[index];
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const auto shiftx = int(shift & kMask) - kShift;
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const auto shifty = int((shift >> 4) & kMask) - kShift;
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dst[index] = src[index + (shifty * width) + shiftx];
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}
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return result;
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}
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[[nodiscard]] QImage GenerateSmallComplexGradient(
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const std::vector<QColor> &colors,
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int rotation,
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float progress) {
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const auto positions = std::vector<std::pair<float, float>>{
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{ 0.80f, 0.10f },
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{ 0.60f, 0.20f },
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{ 0.35f, 0.25f },
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{ 0.25f, 0.60f },
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{ 0.20f, 0.90f },
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{ 0.40f, 0.80f },
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{ 0.65f, 0.75f },
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{ 0.75f, 0.40f },
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};
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const auto positionsForPhase = [&](int phase) {
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auto result = std::vector<std::pair<float, float>>(4);
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for (auto i = 0; i != 4; ++i) {
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result[i] = positions[(phase + i * 2) % 8];
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result[i].second = 1.f - result[i].second;
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}
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return result;
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};
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const auto phase = std::clamp(rotation, 0, 315) / 45;
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const auto previousPhase = (phase + 1) % 8;
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const auto previous = positionsForPhase(previousPhase);
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const auto current = positionsForPhase(phase);
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constexpr auto kWidth = 64;
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constexpr auto kHeight = 64;
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static const auto pixelCache = [&] {
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auto result = std::make_unique<float[]>(kWidth * kHeight * 2);
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const auto invwidth = 1.f / kWidth;
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const auto invheight = 1.f / kHeight;
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auto floats = result.get();
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for (auto y = 0; y != kHeight; ++y) {
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const auto directPixelY = y * invheight;
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const auto centerDistanceY = directPixelY - 0.5f;
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const auto centerDistanceY2 = centerDistanceY * centerDistanceY;
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for (auto x = 0; x != kWidth; ++x) {
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const auto directPixelX = x * invwidth;
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const auto centerDistanceX = directPixelX - 0.5f;
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const auto centerDistance = sqrtf(
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centerDistanceX * centerDistanceX + centerDistanceY2);
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const auto swirlFactor = 0.35f * centerDistance;
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const auto theta = swirlFactor * swirlFactor * 0.8f * 8.0f;
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const auto sinTheta = sinf(theta);
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const auto cosTheta = cosf(theta);
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*floats++ = std::max(
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0.0f,
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std::min(
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1.0f,
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(0.5f
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+ centerDistanceX * cosTheta
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- centerDistanceY * sinTheta)));
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*floats++ = std::max(
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0.0f,
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std::min(
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1.0f,
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(0.5f
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+ centerDistanceX * sinTheta
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+ centerDistanceY * cosTheta)));
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}
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}
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return result;
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}();
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const auto colorsCount = int(colors.size());
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auto colorsFloat = std::vector<std::array<float, 3>>(colorsCount);
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for (auto i = 0; i != colorsCount; ++i) {
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colorsFloat[i] = {
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float(colors[i].red()),
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float(colors[i].green()),
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float(colors[i].blue()),
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};
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}
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auto result = QImage(
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kWidth,
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kHeight,
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QImage::Format_RGB32);
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Assert(result.bytesPerLine() == kWidth * 4);
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auto cache = pixelCache.get();
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auto pixels = reinterpret_cast<uint32*>(result.bits());
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for (auto y = 0; y != kHeight; ++y) {
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for (auto x = 0; x != kWidth; ++x) {
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const auto pixelX = *cache++;
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const auto pixelY = *cache++;
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auto distanceSum = 0.f;
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auto r = 0.f;
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auto g = 0.f;
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auto b = 0.f;
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for (auto i = 0; i != colorsCount; ++i) {
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const auto colorX = previous[i].first
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+ (current[i].first - previous[i].first) * progress;
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const auto colorY = previous[i].second
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+ (current[i].second - previous[i].second) * progress;
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const auto dx = pixelX - colorX;
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const auto dy = pixelY - colorY;
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const auto distance = std::max(
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0.0f,
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0.9f - sqrtf(dx * dx + dy * dy));
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const auto square = distance * distance;
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const auto fourth = square * square;
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distanceSum += fourth;
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r += fourth * colorsFloat[i][0];
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g += fourth * colorsFloat[i][1];
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b += fourth * colorsFloat[i][2];
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}
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const auto red = uint32(r / distanceSum);
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const auto green = uint32(g / distanceSum);
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const auto blue = uint32(b / distanceSum);
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*pixels++ = 0xFF000000U | (red << 16) | (green << 8) | blue;
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}
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}
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return result;
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}
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[[nodiscard]] QImage GenerateComplexGradient(
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QSize size,
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const std::vector<QColor> &colors,
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int rotation,
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float progress) {
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auto exact = GenerateSmallComplexGradient(colors, rotation, progress);
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return (exact.size() == size)
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? exact
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: exact.scaled(
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size,
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Qt::IgnoreAspectRatio,
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Qt::SmoothTransformation);
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}
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} // namespace
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QPixmap PixmapFast(QImage &&image) {
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Expects(image.format() == QImage::Format_ARGB32_Premultiplied
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|| image.format() == QImage::Format_RGB32);
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return QPixmap::fromImage(std::move(image), Qt::NoFormatConversion);
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}
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const std::array<QImage, 4> &CornersMask(ImageRoundRadius radius) {
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if (radius == ImageRoundRadius::Large) {
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static auto Mask = PrepareCornersMask(st::roundRadiusLarge);
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return Mask;
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} else {
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static auto Mask = PrepareCornersMask(st::roundRadiusSmall);
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return Mask;
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}
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}
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std::array<QImage, 4> PrepareCorners(
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ImageRoundRadius radius,
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const style::color &color) {
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auto result = CornersMask(radius);
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for (auto &image : result) {
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style::colorizeImage(image, color->c, &image);
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}
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return result;
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}
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std::array<QImage, 4> CornersMask(int radius) {
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return PrepareCornersMask(radius);
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}
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std::array<QImage, 4> PrepareCorners(
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int radius,
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const style::color &color) {
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auto result = CornersMask(radius);
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for (auto &image : result) {
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style::colorizeImage(image, color->c, &image);
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}
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return result;
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}
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[[nodiscard]] QByteArray UnpackGzip(const QByteArray &bytes) {
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z_stream stream;
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stream.zalloc = nullptr;
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stream.zfree = nullptr;
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stream.opaque = nullptr;
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stream.avail_in = 0;
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stream.next_in = nullptr;
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int res = inflateInit2(&stream, 16 + MAX_WBITS);
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if (res != Z_OK) {
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return bytes;
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}
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const auto guard = gsl::finally([&] { inflateEnd(&stream); });
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auto result = QByteArray(kMaxGzipFileSize + 1, char(0));
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stream.avail_in = bytes.size();
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stream.next_in = reinterpret_cast<Bytef*>(const_cast<char*>(bytes.data()));
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stream.avail_out = 0;
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while (!stream.avail_out) {
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stream.avail_out = result.size();
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stream.next_out = reinterpret_cast<Bytef*>(result.data());
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int res = inflate(&stream, Z_NO_FLUSH);
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if (res != Z_OK && res != Z_STREAM_END) {
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return bytes;
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} else if (!stream.avail_out) {
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return bytes;
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}
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}
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result.resize(result.size() - stream.avail_out);
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return result;
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}
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[[nodiscard]] ReadResult ReadGzipSvg(const ReadArgs &args) {
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const auto bytes = UnpackGzip(args.content);
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if (bytes.isEmpty()) {
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LOG(("Svg Error: Couldn't unpack gzip-ed content."));
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return {};
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}
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auto renderer = QSvgRenderer(bytes);
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if (!renderer.isValid()) {
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LOG(("Svg Error: Invalid data."));
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return {};
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}
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auto size = renderer.defaultSize();
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if (!args.maxSize.isEmpty()
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&& (size.width() > args.maxSize.width()
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|| size.height() > args.maxSize.height())) {
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size = size.scaled(args.maxSize, Qt::KeepAspectRatio);
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}
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if (size.isEmpty()) {
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LOG(("Svg Error: Bad size %1x%2."
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).arg(renderer.defaultSize().width()
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).arg(renderer.defaultSize().height()));
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return {};
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}
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auto result = ReadResult();
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result.image = QImage(size, QImage::Format_ARGB32_Premultiplied);
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result.image.fill(Qt::transparent);
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{
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QPainter p(&result.image);
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renderer.render(&p, QRect(QPoint(), size));
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}
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result.format = "svg";
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return result;
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}
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[[nodiscard]] ReadResult ReadOther(const ReadArgs &args) {
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auto bytes = args.content;
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if (bytes.isEmpty()) {
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return {};
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}
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auto buffer = QBuffer(&bytes);
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auto reader = QImageReader(&buffer);
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reader.setAutoTransform(true);
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if (!reader.canRead()) {
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return {};
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}
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const auto size = reader.size();
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if (size.width() * size.height() > kReadMaxArea) {
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return {};
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}
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auto result = ReadResult();
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result.format = reader.format().toLower();
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result.animated = reader.supportsAnimation()
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&& (reader.imageCount() > 1);
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if (!reader.read(&result.image) || result.image.isNull()) {
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return {};
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}
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return result;
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}
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ReadResult Read(ReadArgs &&args) {
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if (args.content.isEmpty()) {
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if (args.path.isEmpty()) {
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return {};
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}
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auto file = QFile(args.path);
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if (file.size() > kReadBytesLimit
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|| !file.open(QIODevice::ReadOnly)) {
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return {};
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}
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args.content = file.readAll();
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}
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auto result = args.gzipSvg ? ReadGzipSvg(args) : ReadOther(args);
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if (result.image.isNull()) {
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args = ReadArgs();
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return {};
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}
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if (args.returnContent) {
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result.content = args.content;
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} else {
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args.content = QByteArray();
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}
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if (!args.maxSize.isEmpty()
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&& (result.image.width() > args.maxSize.width()
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|| result.image.height() > args.maxSize.height())) {
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result.image = result.image.scaled(
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args.maxSize,
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Qt::KeepAspectRatio,
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Qt::SmoothTransformation);
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}
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if (args.forceOpaque && result.format != qstr("jpeg")) {
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result.image = Opaque(std::move(result.image));
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}
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return result;
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}
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[[nodiscard]] Options RoundOptions(
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ImageRoundRadius radius,
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RectParts corners) {
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const auto withCorners = [&](Option rounding) {
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if (rounding == Option::None) {
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return Options();
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}
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const auto corner = [&](RectPart part, Option skip) {
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return !(corners & part) ? skip : Option();
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};
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return rounding
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| corner(RectPart::TopLeft, Option::RoundSkipTopLeft)
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| corner(RectPart::TopRight, Option::RoundSkipTopRight)
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| corner(RectPart::BottomLeft, Option::RoundSkipBottomLeft)
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| corner(RectPart::BottomRight, Option::RoundSkipBottomRight);
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};
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return withCorners((radius == ImageRoundRadius::Large)
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? Option::RoundLarge
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: (radius == ImageRoundRadius::Small)
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? Option::RoundSmall
|
|
: (radius == ImageRoundRadius::Ellipse)
|
|
? Option::RoundCircle
|
|
: Option::None);
|
|
}
|
|
|
|
QImage Blur(QImage &&image, bool ignoreAlpha) {
|
|
if (image.isNull()) {
|
|
return std::move(image);
|
|
}
|
|
const auto ratio = image.devicePixelRatio();
|
|
const auto format = image.format();
|
|
if (format != QImage::Format_RGB32
|
|
&& format != QImage::Format_ARGB32_Premultiplied) {
|
|
image = std::move(image).convertToFormat(
|
|
QImage::Format_ARGB32_Premultiplied);
|
|
image.setDevicePixelRatio(ratio);
|
|
}
|
|
|
|
auto pix = image.bits();
|
|
if (!pix) {
|
|
return std::move(image);
|
|
}
|
|
const auto w = image.width();
|
|
const auto h = image.height();
|
|
const auto radius = 3;
|
|
const auto r1 = radius + 1;
|
|
const auto div = radius * 2 + 1;
|
|
const auto stride = w * 4;
|
|
if (radius >= 16 || div >= w || div >= h || stride > w * 4) {
|
|
return std::move(image);
|
|
}
|
|
const auto withalpha = !ignoreAlpha && image.hasAlphaChannel();
|
|
if (withalpha) {
|
|
auto smaller = QImage(image.size(), image.format());
|
|
{
|
|
QPainter p(&smaller);
|
|
PainterHighQualityEnabler hq(p);
|
|
|
|
p.setCompositionMode(QPainter::CompositionMode_Source);
|
|
p.fillRect(0, 0, w, h, Qt::transparent);
|
|
p.drawImage(
|
|
QRect(radius, radius, w - 2 * radius, h - 2 * radius),
|
|
image,
|
|
QRect(0, 0, w, h));
|
|
}
|
|
smaller.setDevicePixelRatio(ratio);
|
|
auto was = std::exchange(image, base::take(smaller));
|
|
Assert(!image.isNull());
|
|
|
|
pix = image.bits();
|
|
if (!pix) return was;
|
|
}
|
|
const auto buffer = std::make_unique<uint64[]>(w * h);
|
|
const auto rgb = buffer.get();
|
|
|
|
int x, y, i;
|
|
|
|
int yw = 0;
|
|
const int we = w - r1;
|
|
for (y = 0; y < h; y++) {
|
|
uint64 cur = BlurGetColors(&pix[yw]);
|
|
uint64 rgballsum = -radius * cur;
|
|
uint64 rgbsum = cur * ((r1 * (r1 + 1)) >> 1);
|
|
|
|
for (i = 1; i <= radius; i++) {
|
|
uint64 cur = BlurGetColors(&pix[yw + i * 4]);
|
|
rgbsum += cur * (r1 - i);
|
|
rgballsum += cur;
|
|
}
|
|
|
|
x = 0;
|
|
|
|
#define update(start, middle, end) \
|
|
rgb[y * w + x] = (rgbsum >> 4) & 0x00FF00FF00FF00FFLL; \
|
|
rgballsum += BlurGetColors(&pix[yw + (start) * 4]) - 2 * BlurGetColors(&pix[yw + (middle) * 4]) + BlurGetColors(&pix[yw + (end) * 4]); \
|
|
rgbsum += rgballsum; \
|
|
x++;
|
|
|
|
while (x < r1) {
|
|
update(0, x, x + r1);
|
|
}
|
|
while (x < we) {
|
|
update(x - r1, x, x + r1);
|
|
}
|
|
while (x < w) {
|
|
update(x - r1, x, w - 1);
|
|
}
|
|
|
|
#undef update
|
|
|
|
yw += stride;
|
|
}
|
|
|
|
const int he = h - r1;
|
|
for (x = 0; x < w; x++) {
|
|
uint64 rgballsum = -radius * rgb[x];
|
|
uint64 rgbsum = rgb[x] * ((r1 * (r1 + 1)) >> 1);
|
|
for (i = 1; i <= radius; i++) {
|
|
rgbsum += rgb[i * w + x] * (r1 - i);
|
|
rgballsum += rgb[i * w + x];
|
|
}
|
|
|
|
y = 0;
|
|
int yi = x * 4;
|
|
|
|
#define update(start, middle, end) \
|
|
uint64 res = rgbsum >> 4; \
|
|
pix[yi] = res & 0xFF; \
|
|
pix[yi + 1] = (res >> 16) & 0xFF; \
|
|
pix[yi + 2] = (res >> 32) & 0xFF; \
|
|
pix[yi + 3] = (res >> 48) & 0xFF; \
|
|
rgballsum += rgb[x + (start) * w] - 2 * rgb[x + (middle) * w] + rgb[x + (end) * w]; \
|
|
rgbsum += rgballsum; \
|
|
y++; \
|
|
yi += stride;
|
|
|
|
while (y < r1) {
|
|
update(0, y, y + r1);
|
|
}
|
|
while (y < he) {
|
|
update(y - r1, y, y + r1);
|
|
}
|
|
while (y < h) {
|
|
update(y - r1, y, h - 1);
|
|
}
|
|
|
|
#undef update
|
|
}
|
|
|
|
return std::move(image);
|
|
}
|
|
|
|
[[nodiscard]] QImage BlurLargeImage(QImage &&image, int radius) {
|
|
const auto width = image.width();
|
|
const auto height = image.height();
|
|
if (width <= radius || height <= radius || radius < 1) {
|
|
return std::move(image);
|
|
}
|
|
|
|
if (image.format() != QImage::Format_RGB32
|
|
&& image.format() != QImage::Format_ARGB32_Premultiplied) {
|
|
image = std::move(image).convertToFormat(
|
|
QImage::Format_ARGB32_Premultiplied);
|
|
}
|
|
const auto pixels = image.bits();
|
|
|
|
const auto width_m1 = width - 1;
|
|
const auto height_m1 = height - 1;
|
|
const auto widthxheight = width * height;
|
|
const auto div = 2 * radius + 1;
|
|
const auto radius_p1 = radius + 1;
|
|
const auto divsum = radius_p1 * radius_p1;
|
|
|
|
const auto dvcount = 256 * divsum;
|
|
const auto buffers = (div * 3) // stack
|
|
+ std::max(width, height) // vmin
|
|
+ widthxheight * 3 // rgb
|
|
+ dvcount; // dv
|
|
auto storage = std::vector<int>(buffers);
|
|
auto taken = 0;
|
|
const auto take = [&](int size) {
|
|
const auto result = gsl::make_span(storage).subspan(taken, size);
|
|
taken += size;
|
|
return result;
|
|
};
|
|
|
|
// Small buffers
|
|
const auto stack = take(div * 3).data();
|
|
const auto vmin = take(std::max(width, height)).data();
|
|
|
|
// Large buffers
|
|
const auto rgb = take(widthxheight * 3).data();
|
|
const auto dvs = take(dvcount);
|
|
|
|
auto &&ints = ranges::views::ints;
|
|
for (auto &&[value, index] : ranges::views::zip(dvs, ints(0, ranges::unreachable))) {
|
|
value = (index / divsum);
|
|
}
|
|
const auto dv = dvs.data();
|
|
|
|
// Variables
|
|
auto stackpointer = 0;
|
|
for (const auto x : ints(0, width)) {
|
|
vmin[x] = std::min(x + radius_p1, width_m1);
|
|
}
|
|
for (const auto y : ints(0, height)) {
|
|
auto rinsum = 0;
|
|
auto ginsum = 0;
|
|
auto binsum = 0;
|
|
auto routsum = 0;
|
|
auto goutsum = 0;
|
|
auto boutsum = 0;
|
|
auto rsum = 0;
|
|
auto gsum = 0;
|
|
auto bsum = 0;
|
|
|
|
const auto y_width = y * width;
|
|
for (const auto i : ints(-radius, radius + 1)) {
|
|
const auto sir = &stack[(i + radius) * 3];
|
|
const auto x = std::clamp(i, 0, width_m1);
|
|
const auto offset = (y_width + x) * 4;
|
|
sir[0] = pixels[offset];
|
|
sir[1] = pixels[offset + 1];
|
|
sir[2] = pixels[offset + 2];
|
|
|
|
const auto rbs = radius_p1 - std::abs(i);
|
|
rsum += sir[0] * rbs;
|
|
gsum += sir[1] * rbs;
|
|
bsum += sir[2] * rbs;
|
|
|
|
if (i > 0) {
|
|
rinsum += sir[0];
|
|
ginsum += sir[1];
|
|
binsum += sir[2];
|
|
} else {
|
|
routsum += sir[0];
|
|
goutsum += sir[1];
|
|
boutsum += sir[2];
|
|
}
|
|
}
|
|
stackpointer = radius;
|
|
|
|
for (const auto x : ints(0, width)) {
|
|
const auto position = (y_width + x) * 3;
|
|
rgb[position] = dv[rsum];
|
|
rgb[position + 1] = dv[gsum];
|
|
rgb[position + 2] = dv[bsum];
|
|
|
|
rsum -= routsum;
|
|
gsum -= goutsum;
|
|
bsum -= boutsum;
|
|
|
|
const auto stackstart = (stackpointer - radius + div) % div;
|
|
const auto sir = &stack[stackstart * 3];
|
|
|
|
routsum -= sir[0];
|
|
goutsum -= sir[1];
|
|
boutsum -= sir[2];
|
|
|
|
const auto offset = (y_width + vmin[x]) * 4;
|
|
sir[0] = pixels[offset];
|
|
sir[1] = pixels[offset + 1];
|
|
sir[2] = pixels[offset + 2];
|
|
rinsum += sir[0];
|
|
ginsum += sir[1];
|
|
binsum += sir[2];
|
|
|
|
rsum += rinsum;
|
|
gsum += ginsum;
|
|
bsum += binsum;
|
|
{
|
|
stackpointer = (stackpointer + 1) % div;
|
|
const auto sir = &stack[stackpointer * 3];
|
|
|
|
routsum += sir[0];
|
|
goutsum += sir[1];
|
|
boutsum += sir[2];
|
|
|
|
rinsum -= sir[0];
|
|
ginsum -= sir[1];
|
|
binsum -= sir[2];
|
|
}
|
|
}
|
|
}
|
|
|
|
for (const auto y : ints(0, height)) {
|
|
vmin[y] = std::min(y + radius_p1, height_m1) * width;
|
|
}
|
|
for (const auto x : ints(0, width)) {
|
|
auto rinsum = 0;
|
|
auto ginsum = 0;
|
|
auto binsum = 0;
|
|
auto routsum = 0;
|
|
auto goutsum = 0;
|
|
auto boutsum = 0;
|
|
auto rsum = 0;
|
|
auto gsum = 0;
|
|
auto bsum = 0;
|
|
for (const auto i : ints(-radius, radius + 1)) {
|
|
const auto y = std::clamp(i, 0, height_m1);
|
|
const auto position = (y * width + x) * 3;
|
|
const auto sir = &stack[(i + radius) * 3];
|
|
|
|
sir[0] = rgb[position];
|
|
sir[1] = rgb[position + 1];
|
|
sir[2] = rgb[position + 2];
|
|
|
|
const auto rbs = radius_p1 - std::abs(i);
|
|
rsum += sir[0] * rbs;
|
|
gsum += sir[1] * rbs;
|
|
bsum += sir[2] * rbs;
|
|
if (i > 0) {
|
|
rinsum += sir[0];
|
|
ginsum += sir[1];
|
|
binsum += sir[2];
|
|
} else {
|
|
routsum += sir[0];
|
|
goutsum += sir[1];
|
|
boutsum += sir[2];
|
|
}
|
|
}
|
|
stackpointer = radius;
|
|
for (const auto y : ints(0, height)) {
|
|
const auto offset = (y * width + x) * 4;
|
|
pixels[offset] = dv[rsum];
|
|
pixels[offset + 1] = dv[gsum];
|
|
pixels[offset + 2] = dv[bsum];
|
|
rsum -= routsum;
|
|
gsum -= goutsum;
|
|
bsum -= boutsum;
|
|
|
|
const auto stackstart = (stackpointer - radius + div) % div;
|
|
const auto sir = &stack[stackstart * 3];
|
|
|
|
routsum -= sir[0];
|
|
goutsum -= sir[1];
|
|
boutsum -= sir[2];
|
|
|
|
const auto position = (vmin[y] + x) * 3;
|
|
sir[0] = rgb[position];
|
|
sir[1] = rgb[position + 1];
|
|
sir[2] = rgb[position + 2];
|
|
|
|
rinsum += sir[0];
|
|
ginsum += sir[1];
|
|
binsum += sir[2];
|
|
|
|
rsum += rinsum;
|
|
gsum += ginsum;
|
|
bsum += binsum;
|
|
{
|
|
stackpointer = (stackpointer + 1) % div;
|
|
const auto sir = &stack[stackpointer * 3];
|
|
|
|
routsum += sir[0];
|
|
goutsum += sir[1];
|
|
boutsum += sir[2];
|
|
|
|
rinsum -= sir[0];
|
|
ginsum -= sir[1];
|
|
binsum -= sir[2];
|
|
}
|
|
}
|
|
}
|
|
return std::move(image);
|
|
}
|
|
|
|
[[nodiscard]] QImage DitherImage(const QImage &image) {
|
|
Expects(image.bytesPerLine() == image.width() * 4);
|
|
|
|
const auto width = image.width();
|
|
const auto height = image.height();
|
|
const auto min = std::min(width, height);
|
|
const auto max = std::max(width, height);
|
|
if (max >= 1024 && min >= 512) {
|
|
return DitherGeneric<4>(image);
|
|
} else if (max >= 512 && min >= 256) {
|
|
return DitherGeneric<3>(image);
|
|
} else if (max >= 256 && min >= 128) {
|
|
return DitherGeneric<2>(image);
|
|
} else if (min >= 32) {
|
|
return DitherGeneric<1>(image);
|
|
}
|
|
return image;
|
|
}
|
|
|
|
[[nodiscard]] QImage GenerateGradient(
|
|
QSize size,
|
|
const std::vector<QColor> &colors,
|
|
int rotation,
|
|
float progress) {
|
|
Expects(!colors.empty());
|
|
Expects(colors.size() <= 4);
|
|
|
|
if (size.isEmpty()) {
|
|
return QImage();
|
|
} else if (colors.size() > 2) {
|
|
return GenerateComplexGradient(size, colors, rotation, progress);
|
|
} else {
|
|
return GenerateLinearGradient(size, colors, rotation);
|
|
}
|
|
}
|
|
|
|
QImage GenerateLinearGradient(
|
|
QSize size,
|
|
const std::vector<QColor> &colors,
|
|
int rotation) {
|
|
Expects(!colors.empty());
|
|
|
|
auto result = QImage(size, QImage::Format_RGB32);
|
|
if (colors.size() == 1) {
|
|
result.fill(colors.front());
|
|
return result;
|
|
}
|
|
|
|
auto p = QPainter(&result);
|
|
const auto width = size.width();
|
|
const auto height = size.height();
|
|
const auto [start, finalStop] = [&]() -> std::pair<QPoint, QPoint> {
|
|
const auto type = std::clamp(rotation, 0, 315) / 45;
|
|
switch (type) {
|
|
case 0: return { { 0, 0 }, { 0, height } };
|
|
case 1: return { { width, 0 }, { 0, height } };
|
|
case 2: return { { width, 0 }, { 0, 0 } };
|
|
case 3: return { { width, height }, { 0, 0 } };
|
|
case 4: return { { 0, height }, { 0, 0 } };
|
|
case 5: return { { 0, height }, { width, 0 } };
|
|
case 6: return { { 0, 0 }, { width, 0 } };
|
|
case 7: return { { 0, 0 }, { width, height } };
|
|
}
|
|
Unexpected("Rotation value in GenerateDitheredGradient.");
|
|
}();
|
|
auto gradient = QLinearGradient(start, finalStop);
|
|
|
|
if (colors.size() == 2) {
|
|
gradient.setStops(QGradientStops{
|
|
{ 0.0, colors[0] },
|
|
{ 1.0, colors[1] }
|
|
});
|
|
} else {
|
|
auto stops = QGradientStops();
|
|
const auto step = 1. / (colors.size() - 1);
|
|
auto point = 0.;
|
|
for (const auto &color : colors) {
|
|
stops.append({ point, color });
|
|
point += step;
|
|
}
|
|
gradient.setStops(std::move(stops));
|
|
}
|
|
p.fillRect(QRect(QPoint(), size), QBrush(std::move(gradient)));
|
|
p.end();
|
|
|
|
return result;
|
|
}
|
|
|
|
QImage GenerateShadow(
|
|
int height,
|
|
int topAlpha,
|
|
int bottomAlpha,
|
|
QColor color) {
|
|
Expects(topAlpha >= 0 && topAlpha < 256);
|
|
Expects(bottomAlpha >= 0 && bottomAlpha < 256);
|
|
Expects(height * style::DevicePixelRatio() < 65536);
|
|
|
|
const auto base = (uint32(color.red()) << 16)
|
|
| (uint32(color.green()) << 8)
|
|
| uint32(color.blue());
|
|
const auto premultiplied = (topAlpha == bottomAlpha) || !base;
|
|
auto result = QImage(
|
|
QSize(1, height * style::DevicePixelRatio()),
|
|
(premultiplied
|
|
? QImage::Format_ARGB32_Premultiplied
|
|
: QImage::Format_ARGB32));
|
|
if (topAlpha == bottomAlpha) {
|
|
color.setAlpha(topAlpha);
|
|
result.fill(color);
|
|
return result;
|
|
}
|
|
constexpr auto kShift = 16;
|
|
constexpr auto kMultiply = (1U << kShift);
|
|
const auto values = std::abs(topAlpha - bottomAlpha);
|
|
const auto rows = uint32(result.height());
|
|
const auto step = (values * kMultiply) / (rows - 1);
|
|
const auto till = rows * uint32(step);
|
|
Assert(result.bytesPerLine() == sizeof(uint32));
|
|
auto ints = reinterpret_cast<uint32*>(result.bits());
|
|
if (topAlpha < bottomAlpha) {
|
|
for (auto i = uint32(0); i != till; i += step) {
|
|
*ints++ = base | ((topAlpha + (i >> kShift)) << 24);
|
|
}
|
|
} else {
|
|
for (auto i = uint32(0); i != till; i += step) {
|
|
*ints++ = base | ((topAlpha - (i >> kShift)) << 24);
|
|
}
|
|
}
|
|
if (!premultiplied) {
|
|
result = std::move(result).convertToFormat(
|
|
QImage::Format_ARGB32_Premultiplied);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
QImage Circle(QImage &&image, QRect target) {
|
|
Expects(!image.isNull());
|
|
|
|
if (target.isNull()) {
|
|
target = QRect(QPoint(), image.size());
|
|
} else {
|
|
Assert(QRect(QPoint(), image.size()).contains(target));
|
|
}
|
|
|
|
image = std::move(image).convertToFormat(
|
|
QImage::Format_ARGB32_Premultiplied);
|
|
Assert(!image.isNull());
|
|
|
|
const auto ratio = image.devicePixelRatio();
|
|
auto p = QPainter(&image);
|
|
p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
|
|
p.drawImage(
|
|
QRectF(target.topLeft() / ratio, target.size() / ratio),
|
|
CircleMask(target.size()));
|
|
p.end();
|
|
|
|
return std::move(image);
|
|
}
|
|
|
|
QImage Round(
|
|
QImage &&image,
|
|
gsl::span<const QImage, 4> cornerMasks,
|
|
RectParts corners,
|
|
QRect target) {
|
|
if (target.isNull()) {
|
|
target = QRect(QPoint(), image.size());
|
|
} else {
|
|
Assert(QRect(QPoint(), image.size()).contains(target));
|
|
}
|
|
const auto targetWidth = target.width();
|
|
const auto targetHeight = target.height();
|
|
|
|
image = std::move(image).convertToFormat(
|
|
QImage::Format_ARGB32_Premultiplied);
|
|
Assert(!image.isNull());
|
|
|
|
// We need to detach image first (if it is shared), before we
|
|
// count some offsets using QImage::bytesPerLine etc, because
|
|
// bytesPerLine may change on detach, this leads to crashes:
|
|
// Real image bytesPerLine is smaller than the one we use for offsets.
|
|
auto ints = reinterpret_cast<uint32*>(image.bits());
|
|
|
|
constexpr auto kImageIntsPerPixel = 1;
|
|
const auto imageIntsPerLine = (image.bytesPerLine() >> 2);
|
|
Assert(image.depth() == ((kImageIntsPerPixel * sizeof(uint32)) << 3));
|
|
Assert(image.bytesPerLine() == (imageIntsPerLine << 2));
|
|
const auto maskCorner = [&](
|
|
const QImage &mask,
|
|
bool right = false,
|
|
bool bottom = false) {
|
|
const auto maskWidth = mask.width();
|
|
const auto maskHeight = mask.height();
|
|
if (mask.isNull()
|
|
|| targetWidth < maskWidth
|
|
|| targetHeight < maskHeight) {
|
|
return;
|
|
}
|
|
|
|
const auto maskBytesPerPixel = (mask.depth() >> 3);
|
|
const auto maskBytesPerLine = mask.bytesPerLine();
|
|
const auto maskBytesAdded = maskBytesPerLine
|
|
- maskWidth * maskBytesPerPixel;
|
|
Assert(maskBytesAdded >= 0);
|
|
Assert(mask.depth() == (maskBytesPerPixel << 3));
|
|
const auto imageIntsAdded = imageIntsPerLine
|
|
- maskWidth * kImageIntsPerPixel;
|
|
Assert(imageIntsAdded >= 0);
|
|
auto imageInts = ints + target.x() + target.y() * imageIntsPerLine;
|
|
if (right) {
|
|
imageInts += targetWidth - maskWidth;
|
|
}
|
|
if (bottom) {
|
|
imageInts += (targetHeight - maskHeight) * imageIntsPerLine;
|
|
}
|
|
auto maskBytes = mask.constBits();
|
|
for (auto y = 0; y != maskHeight; ++y) {
|
|
for (auto x = 0; x != maskWidth; ++x) {
|
|
auto opacity = static_cast<anim::ShiftedMultiplier>(*maskBytes) + 1;
|
|
*imageInts = anim::unshifted(anim::shifted(*imageInts) * opacity);
|
|
maskBytes += maskBytesPerPixel;
|
|
imageInts += kImageIntsPerPixel;
|
|
}
|
|
maskBytes += maskBytesAdded;
|
|
imageInts += imageIntsAdded;
|
|
}
|
|
};
|
|
|
|
if (corners & RectPart::TopLeft) maskCorner(cornerMasks[0]);
|
|
if (corners & RectPart::TopRight) maskCorner(cornerMasks[1], true);
|
|
if (corners & RectPart::BottomLeft) {
|
|
maskCorner(cornerMasks[2], false, true);
|
|
}
|
|
if (corners & RectPart::BottomRight) {
|
|
maskCorner(cornerMasks[3], true, true);
|
|
}
|
|
|
|
return std::move(image);
|
|
}
|
|
|
|
QImage Round(
|
|
QImage &&image,
|
|
ImageRoundRadius radius,
|
|
RectParts corners,
|
|
QRect target) {
|
|
if (!static_cast<int>(corners)) {
|
|
return std::move(image);
|
|
} else if (radius == ImageRoundRadius::Ellipse) {
|
|
Assert((corners & RectPart::AllCorners) == RectPart::AllCorners);
|
|
return Circle(std::move(image), target);
|
|
}
|
|
Assert(!image.isNull());
|
|
|
|
const auto masks = CornersMask(radius);
|
|
return Round(std::move(image), masks, corners, target);
|
|
}
|
|
|
|
QImage Round(QImage &&image, Options options, QRect target) {
|
|
if (options & Option::RoundCircle) {
|
|
return Circle(std::move(image), target);
|
|
} else if (!(options & (Option::RoundLarge | Option::RoundSmall))) {
|
|
return std::move(image);
|
|
}
|
|
const auto corner = [&](Option skip, RectPart part) {
|
|
return !(options & skip) ? part : RectPart::None;
|
|
};
|
|
return Round(
|
|
std::move(image),
|
|
((options & Option::RoundLarge)
|
|
? ImageRoundRadius::Large
|
|
: ImageRoundRadius::Small),
|
|
(corner(Option::RoundSkipTopLeft, RectPart::TopLeft)
|
|
| corner(Option::RoundSkipTopRight, RectPart::TopRight)
|
|
| corner(Option::RoundSkipBottomLeft, RectPart::BottomLeft)
|
|
| corner(Option::RoundSkipBottomRight, RectPart::BottomRight)),
|
|
target);
|
|
}
|
|
|
|
QImage Colored(QImage &&image, style::color add) {
|
|
return Colored(std::move(image), add->c);
|
|
}
|
|
|
|
QImage Colored(QImage &&image, QColor add) {
|
|
const auto format = image.format();
|
|
if (format != QImage::Format_RGB32
|
|
&& format != QImage::Format_ARGB32_Premultiplied) {
|
|
image = std::move(image).convertToFormat(
|
|
QImage::Format_ARGB32_Premultiplied);
|
|
}
|
|
|
|
if (const auto pix = image.bits()) {
|
|
const auto ca = int(add.alphaF() * 0xFF);
|
|
const auto cr = int(add.redF() * 0xFF);
|
|
const auto cg = int(add.greenF() * 0xFF);
|
|
const auto cb = int(add.blueF() * 0xFF);
|
|
const auto w = image.width();
|
|
const auto h = image.height();
|
|
const auto add = image.bytesPerLine() - (w * 4);
|
|
auto i = index_type();
|
|
for (auto y = 0; y != h; ++y) {
|
|
for (auto to = i + (w * 4); i != to; i += 4) {
|
|
const auto b = pix[i];
|
|
const auto g = pix[i + 1];
|
|
const auto r = pix[i + 2];
|
|
const auto a = pix[i + 3];
|
|
const auto aca = a * ca;
|
|
pix[i + 0] = uchar(b + ((aca * (cb - b)) >> 16));
|
|
pix[i + 1] = uchar(g + ((aca * (cg - g)) >> 16));
|
|
pix[i + 2] = uchar(r + ((aca * (cr - r)) >> 16));
|
|
pix[i + 3] = uchar(a + ((aca * (0xFF - a)) >> 16));
|
|
}
|
|
i += add;
|
|
}
|
|
}
|
|
return std::move(image);
|
|
}
|
|
|
|
QImage Opaque(QImage &&image) {
|
|
if (image.hasAlphaChannel()) {
|
|
image = std::move(image).convertToFormat(
|
|
QImage::Format_ARGB32_Premultiplied);
|
|
auto ints = reinterpret_cast<uint32*>(image.bits());
|
|
const auto bg = anim::shifted(QColor(Qt::white));
|
|
const auto width = image.width();
|
|
const auto height = image.height();
|
|
const auto addPerLine = (image.bytesPerLine() / sizeof(uint32)) - width;
|
|
for (auto y = 0; y != height; ++y) {
|
|
for (auto x = 0; x != width; ++x) {
|
|
const auto components = anim::shifted(*ints);
|
|
*ints++ = anim::unshifted(components * 256
|
|
+ bg * (256 - anim::getAlpha(components)));
|
|
}
|
|
ints += addPerLine;
|
|
}
|
|
}
|
|
return std::move(image);
|
|
}
|
|
|
|
QImage Prepare(QImage image, int w, int h, const PrepareArgs &args) {
|
|
Expects(!image.isNull());
|
|
|
|
if (args.options & Option::Blur) {
|
|
image = Blur(std::move(image));
|
|
Assert(!image.isNull());
|
|
}
|
|
if (w <= 0
|
|
|| (w == image.width() && (h <= 0 || h == image.height()))) {
|
|
} else if (h <= 0) {
|
|
image = image.scaledToWidth(
|
|
w,
|
|
((args.options & Images::Option::FastTransform)
|
|
? Qt::FastTransformation
|
|
: Qt::SmoothTransformation));
|
|
Assert(!image.isNull());
|
|
} else {
|
|
image = image.scaled(
|
|
w,
|
|
h,
|
|
Qt::IgnoreAspectRatio,
|
|
((args.options & Images::Option::FastTransform)
|
|
? Qt::FastTransformation
|
|
: Qt::SmoothTransformation));
|
|
Assert(!image.isNull());
|
|
}
|
|
auto outer = args.outer;
|
|
if (!outer.isEmpty()) {
|
|
const auto ratio = style::DevicePixelRatio();
|
|
outer *= ratio;
|
|
if (outer != QSize(w, h)) {
|
|
image.setDevicePixelRatio(ratio);
|
|
auto result = QImage(outer, QImage::Format_ARGB32_Premultiplied);
|
|
result.setDevicePixelRatio(ratio);
|
|
if (args.options & Images::Option::TransparentBackground) {
|
|
result.fill(Qt::transparent);
|
|
}
|
|
{
|
|
QPainter p(&result);
|
|
if (!(args.options & Images::Option::TransparentBackground)) {
|
|
if (w < outer.width() || h < outer.height()) {
|
|
p.fillRect(
|
|
QRect({}, result.size() / ratio),
|
|
Qt::black);
|
|
}
|
|
}
|
|
p.drawImage(
|
|
(result.width() - image.width()) / (2 * ratio),
|
|
(result.height() - image.height()) / (2 * ratio),
|
|
image);
|
|
}
|
|
image = std::move(result);
|
|
Assert(!image.isNull());
|
|
}
|
|
}
|
|
|
|
if (args.options
|
|
& (Option::RoundCircle | Option::RoundLarge | Option::RoundSmall)) {
|
|
image = Round(std::move(image), args.options);
|
|
Assert(!image.isNull());
|
|
}
|
|
if (args.colored) {
|
|
image = Colored(std::move(image), *args.colored);
|
|
}
|
|
image.setDevicePixelRatio(style::DevicePixelRatio());
|
|
return image;
|
|
}
|
|
|
|
bool IsProgressiveJpeg(const QByteArray &bytes) {
|
|
struct jpeg_decompress_struct info;
|
|
struct my_error_mgr jerr;
|
|
|
|
info.err = jpeg_std_error(&jerr);
|
|
jerr.error_exit = my_error_exit;
|
|
if (setjmp(jerr.setjmp_buffer)) {
|
|
return false;
|
|
}
|
|
|
|
jpeg_create_decompress(&info);
|
|
jpeg_mem_src(
|
|
&info,
|
|
reinterpret_cast<const unsigned char*>(bytes.data()),
|
|
bytes.size());
|
|
if (jpeg_read_header(&info, TRUE) != 1) {
|
|
return false;
|
|
}
|
|
|
|
const auto result = (info.progressive_mode > 0);
|
|
jpeg_destroy_decompress(&info);
|
|
|
|
return result;
|
|
}
|
|
|
|
} // namespace Images
|