362 lines
11 KiB
C++
362 lines
11 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "ui/image/image_prepare.h"
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namespace Images {
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namespace {
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TG_FORCE_INLINE uint64 blurGetColors(const uchar *p) {
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return (uint64)p[0] + ((uint64)p[1] << 16) + ((uint64)p[2] << 32) + ((uint64)p[3] << 48);
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}
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const QPixmap &circleMask(int width, int height) {
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Assert(Global::started());
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uint64 key = uint64(uint32(width)) << 32 | uint64(uint32(height));
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Global::CircleMasksMap &masks(Global::RefCircleMasks());
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auto i = masks.constFind(key);
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if (i == masks.cend()) {
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QImage mask(width, height, QImage::Format_ARGB32_Premultiplied);
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{
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Painter p(&mask);
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PainterHighQualityEnabler hq(p);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.fillRect(0, 0, width, height, Qt::transparent);
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p.setBrush(Qt::white);
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p.setPen(Qt::NoPen);
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p.drawEllipse(0, 0, width, height);
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}
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mask.setDevicePixelRatio(cRetinaFactor());
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i = masks.insert(key, App::pixmapFromImageInPlace(std::move(mask)));
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}
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return i.value();
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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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QImage prepareBlur(QImage img) {
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if (img.isNull()) {
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return img;
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}
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auto ratio = img.devicePixelRatio();
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auto fmt = img.format();
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if (fmt != QImage::Format_RGB32 && fmt != QImage::Format_ARGB32_Premultiplied) {
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img = img.convertToFormat(QImage::Format_ARGB32_Premultiplied);
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img.setDevicePixelRatio(ratio);
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Assert(!img.isNull());
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}
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uchar *pix = img.bits();
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if (pix) {
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int w = img.width(), h = img.height(), wold = w, hold = h;
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const int radius = 3;
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const int r1 = radius + 1;
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const int div = radius * 2 + 1;
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const int stride = w * 4;
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if (radius < 16 && div < w && div < h && stride <= w * 4) {
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bool withalpha = img.hasAlphaChannel();
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if (withalpha) {
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QImage imgsmall(w, h, img.format());
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{
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Painter p(&imgsmall);
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PainterHighQualityEnabler hq(p);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.fillRect(0, 0, w, h, Qt::transparent);
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p.drawImage(QRect(radius, radius, w - 2 * radius, h - 2 * radius), img, QRect(0, 0, w, h));
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}
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imgsmall.setDevicePixelRatio(ratio);
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auto was = img;
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img = std::move(imgsmall);
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imgsmall = QImage();
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Assert(!img.isNull());
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pix = img.bits();
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if (!pix) return was;
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}
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uint64 *rgb = new uint64[w * h];
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int x, y, i;
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int yw = 0;
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const int we = w - r1;
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for (y = 0; y < h; y++) {
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uint64 cur = blurGetColors(&pix[yw]);
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uint64 rgballsum = -radius * cur;
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uint64 rgbsum = cur * ((r1 * (r1 + 1)) >> 1);
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for (i = 1; i <= radius; i++) {
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uint64 cur = blurGetColors(&pix[yw + i * 4]);
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rgbsum += cur * (r1 - i);
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rgballsum += cur;
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}
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x = 0;
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#define update(start, middle, end) \
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rgb[y * w + x] = (rgbsum >> 4) & 0x00FF00FF00FF00FFLL; \
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rgballsum += blurGetColors(&pix[yw + (start) * 4]) - 2 * blurGetColors(&pix[yw + (middle) * 4]) + blurGetColors(&pix[yw + (end) * 4]); \
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rgbsum += rgballsum; \
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x++;
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while (x < r1) {
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update(0, x, x + r1);
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}
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while (x < we) {
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update(x - r1, x, x + r1);
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}
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while (x < w) {
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update(x - r1, x, w - 1);
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}
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#undef update
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yw += stride;
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}
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const int he = h - r1;
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for (x = 0; x < w; x++) {
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uint64 rgballsum = -radius * rgb[x];
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uint64 rgbsum = rgb[x] * ((r1 * (r1 + 1)) >> 1);
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for (i = 1; i <= radius; i++) {
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rgbsum += rgb[i * w + x] * (r1 - i);
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rgballsum += rgb[i * w + x];
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}
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y = 0;
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int yi = x * 4;
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#define update(start, middle, end) \
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uint64 res = rgbsum >> 4; \
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pix[yi] = res & 0xFF; \
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pix[yi + 1] = (res >> 16) & 0xFF; \
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pix[yi + 2] = (res >> 32) & 0xFF; \
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pix[yi + 3] = (res >> 48) & 0xFF; \
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rgballsum += rgb[x + (start) * w] - 2 * rgb[x + (middle) * w] + rgb[x + (end) * w]; \
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rgbsum += rgballsum; \
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y++; \
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yi += stride;
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while (y < r1) {
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update(0, y, y + r1);
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}
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while (y < he) {
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update(y - r1, y, y + r1);
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}
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while (y < h) {
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update(y - r1, y, h - 1);
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}
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#undef update
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}
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delete[] rgb;
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}
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}
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return img;
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}
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void prepareCircle(QImage &img) {
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Assert(!img.isNull());
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img.setDevicePixelRatio(cRetinaFactor());
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img = img.convertToFormat(QImage::Format_ARGB32_Premultiplied);
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Assert(!img.isNull());
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QPixmap mask = circleMask(img.width(), img.height());
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Painter p(&img);
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p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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p.drawPixmap(0, 0, mask);
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}
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void prepareRound(
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QImage &image,
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QImage *cornerMasks,
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RectParts corners,
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QRect target) {
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if (target.isNull()) {
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target = QRect(QPoint(), image.size());
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} else {
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Assert(QRect(QPoint(), image.size()).contains(target));
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}
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auto cornerWidth = cornerMasks[0].width();
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auto cornerHeight = cornerMasks[0].height();
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auto imageWidth = image.width();
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auto imageHeight = image.height();
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if (imageWidth < 2 * cornerWidth || imageHeight < 2 * cornerHeight) {
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return;
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}
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constexpr auto imageIntsPerPixel = 1;
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auto imageIntsPerLine = (image.bytesPerLine() >> 2);
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Assert(image.depth() == static_cast<int>((imageIntsPerPixel * sizeof(uint32)) << 3));
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Assert(image.bytesPerLine() == (imageIntsPerLine << 2));
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auto ints = reinterpret_cast<uint32*>(image.bits());
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auto intsTopLeft = ints + target.x() + target.y() * imageWidth;
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auto intsTopRight = ints + target.x() + target.width() - cornerWidth + target.y() * imageWidth;
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auto intsBottomLeft = ints + target.x() + (target.y() + target.height() - cornerHeight) * imageWidth;
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auto intsBottomRight = ints + target.x() + target.width() - cornerWidth + (target.y() + target.height() - cornerHeight) * imageWidth;
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auto maskCorner = [&](uint32 *imageInts, const QImage &mask) {
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auto maskWidth = mask.width();
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auto maskHeight = mask.height();
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auto maskBytesPerPixel = (mask.depth() >> 3);
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auto maskBytesPerLine = mask.bytesPerLine();
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auto maskBytesAdded = maskBytesPerLine - maskWidth * maskBytesPerPixel;
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auto maskBytes = mask.constBits();
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Assert(maskBytesAdded >= 0);
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Assert(mask.depth() == (maskBytesPerPixel << 3));
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auto imageIntsAdded = imageIntsPerLine - maskWidth * imageIntsPerPixel;
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Assert(imageIntsAdded >= 0);
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for (auto y = 0; y != maskHeight; ++y) {
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for (auto x = 0; x != maskWidth; ++x) {
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auto opacity = static_cast<anim::ShiftedMultiplier>(*maskBytes) + 1;
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*imageInts = anim::unshifted(anim::shifted(*imageInts) * opacity);
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maskBytes += maskBytesPerPixel;
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imageInts += imageIntsPerPixel;
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}
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maskBytes += maskBytesAdded;
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imageInts += imageIntsAdded;
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}
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};
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if (corners & RectPart::TopLeft) maskCorner(intsTopLeft, cornerMasks[0]);
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if (corners & RectPart::TopRight) maskCorner(intsTopRight, cornerMasks[1]);
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if (corners & RectPart::BottomLeft) maskCorner(intsBottomLeft, cornerMasks[2]);
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if (corners & RectPart::BottomRight) maskCorner(intsBottomRight, cornerMasks[3]);
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}
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void prepareRound(
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QImage &image,
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ImageRoundRadius radius,
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RectParts corners,
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QRect target) {
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if (!static_cast<int>(corners)) {
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return;
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} else if (radius == ImageRoundRadius::Ellipse) {
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Assert((corners & RectPart::AllCorners) == RectPart::AllCorners);
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Assert(target.isNull());
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prepareCircle(image);
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}
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Assert(!image.isNull());
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image.setDevicePixelRatio(cRetinaFactor());
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image = std::move(image).convertToFormat(QImage::Format_ARGB32_Premultiplied);
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Assert(!image.isNull());
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auto masks = App::cornersMask(radius);
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prepareRound(image, masks, corners, target);
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}
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QImage prepareColored(style::color add, QImage image) {
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auto format = image.format();
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if (format != QImage::Format_RGB32 && format != QImage::Format_ARGB32_Premultiplied) {
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image = std::move(image).convertToFormat(QImage::Format_ARGB32_Premultiplied);
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}
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if (auto pix = image.bits()) {
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int ca = int(add->c.alphaF() * 0xFF), cr = int(add->c.redF() * 0xFF), cg = int(add->c.greenF() * 0xFF), cb = int(add->c.blueF() * 0xFF);
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const int w = image.width(), h = image.height(), size = w * h * 4;
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for (auto i = index_type(); i < size; i += 4) {
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int b = pix[i], g = pix[i + 1], r = pix[i + 2], a = pix[i + 3], aca = a * ca;
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pix[i + 0] = uchar(b + ((aca * (cb - b)) >> 16));
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pix[i + 1] = uchar(g + ((aca * (cg - g)) >> 16));
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pix[i + 2] = uchar(r + ((aca * (cr - r)) >> 16));
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pix[i + 3] = uchar(a + ((aca * (0xFF - a)) >> 16));
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}
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}
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return image;
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}
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QImage prepareOpaque(QImage image) {
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if (image.hasAlphaChannel()) {
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image = std::move(image).convertToFormat(QImage::Format_ARGB32_Premultiplied);
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auto ints = reinterpret_cast<uint32*>(image.bits());
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auto bg = anim::shifted(st::imageBgTransparent->c);
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auto width = image.width();
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auto height = image.height();
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auto addPerLine = (image.bytesPerLine() / sizeof(uint32)) - width;
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for (auto y = 0; y != height; ++y) {
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for (auto x = 0; x != width; ++x) {
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auto components = anim::shifted(*ints);
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*ints++ = anim::unshifted(components * 256 + bg * (256 - anim::getAlpha(components)));
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}
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ints += addPerLine;
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}
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}
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return image;
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}
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QImage prepare(QImage img, int w, int h, Images::Options options, int outerw, int outerh, const style::color *colored) {
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Assert(!img.isNull());
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if (options & Images::Option::Blurred) {
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img = prepareBlur(std::move(img));
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Assert(!img.isNull());
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}
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if (w <= 0 || (w == img.width() && (h <= 0 || h == img.height()))) {
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} else if (h <= 0) {
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img = img.scaledToWidth(w, (options & Images::Option::Smooth) ? Qt::SmoothTransformation : Qt::FastTransformation);
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Assert(!img.isNull());
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} else {
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img = img.scaled(w, h, Qt::IgnoreAspectRatio, (options & Images::Option::Smooth) ? Qt::SmoothTransformation : Qt::FastTransformation);
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Assert(!img.isNull());
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}
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if (outerw > 0 && outerh > 0) {
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outerw *= cIntRetinaFactor();
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outerh *= cIntRetinaFactor();
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if (outerw != w || outerh != h) {
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img.setDevicePixelRatio(cRetinaFactor());
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auto result = QImage(outerw, outerh, QImage::Format_ARGB32_Premultiplied);
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result.setDevicePixelRatio(cRetinaFactor());
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if (options & Images::Option::TransparentBackground) {
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result.fill(Qt::transparent);
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}
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{
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QPainter p(&result);
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if (w < outerw || h < outerh) {
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p.fillRect(0, 0, result.width(), result.height(), st::imageBg);
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}
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p.drawImage((result.width() - img.width()) / (2 * cIntRetinaFactor()), (result.height() - img.height()) / (2 * cIntRetinaFactor()), img);
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}
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img = result;
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Assert(!img.isNull());
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}
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}
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auto corners = [](Images::Options options) {
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return ((options & Images::Option::RoundedTopLeft) ? RectPart::TopLeft : RectPart::None)
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| ((options & Images::Option::RoundedTopRight) ? RectPart::TopRight : RectPart::None)
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| ((options & Images::Option::RoundedBottomLeft) ? RectPart::BottomLeft : RectPart::None)
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| ((options & Images::Option::RoundedBottomRight) ? RectPart::BottomRight : RectPart::None);
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};
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if (options & Images::Option::Circled) {
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prepareCircle(img);
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Assert(!img.isNull());
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} else if (options & Images::Option::RoundedLarge) {
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prepareRound(img, ImageRoundRadius::Large, corners(options));
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Assert(!img.isNull());
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} else if (options & Images::Option::RoundedSmall) {
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prepareRound(img, ImageRoundRadius::Small, corners(options));
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Assert(!img.isNull());
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}
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if (options & Images::Option::Colored) {
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Assert(colored != nullptr);
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img = prepareColored(*colored, std::move(img));
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}
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img.setDevicePixelRatio(cRetinaFactor());
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return img;
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}
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} // namespace Images
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