283 lines
8.6 KiB
C++
283 lines
8.6 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2008 Lubos Lunak <l.lunak@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "kwinxrenderutils.h"
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#include "logging_p.h"
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#include <QCoreApplication>
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#include <QStack>
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#include <QPixmap>
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#include <QGlobalStatic>
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namespace KWin
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{
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namespace XRenderUtils
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{
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static xcb_connection_t *s_connection = nullptr;
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static xcb_window_t s_rootWindow = XCB_WINDOW_NONE;
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static XRenderPicture s_blendPicture(XCB_RENDER_PICTURE_NONE);
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void init(xcb_connection_t *connection, xcb_window_t rootWindow)
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{
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s_connection = connection;
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s_rootWindow = rootWindow;
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}
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void cleanup()
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{
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s_blendPicture = XRenderPicture(XCB_RENDER_PICTURE_NONE);
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s_connection = nullptr;
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s_rootWindow = XCB_WINDOW_NONE;
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}
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} // namespace
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// adapted from Qt, because this really sucks ;)
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xcb_render_color_t preMultiply(const QColor &c, float opacity)
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{
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xcb_render_color_t color;
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const uint A = c.alpha() * opacity,
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R = c.red(),
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G = c.green(),
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B = c.blue();
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color.alpha = (A | A << 8);
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color.red = (R | R << 8) * color.alpha / 0x10000;
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color.green = (G | G << 8) * color.alpha / 0x10000;
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color.blue = (B | B << 8) * color.alpha / 0x10000;
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return color;
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}
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XRenderPicture xRenderFill(const xcb_render_color_t &c)
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{
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xcb_pixmap_t pixmap = xcb_generate_id(XRenderUtils::s_connection);
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xcb_create_pixmap(XRenderUtils::s_connection, 32, pixmap, XRenderUtils::s_rootWindow, 1, 1);
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XRenderPicture fill(pixmap, 32);
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xcb_free_pixmap(XRenderUtils::s_connection, pixmap);
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uint32_t values[] = {true};
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xcb_render_change_picture(XRenderUtils::s_connection, fill, XCB_RENDER_CP_REPEAT, values);
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xcb_rectangle_t rect = {0, 0, 1, 1};
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xcb_render_fill_rectangles(XRenderUtils::s_connection, XCB_RENDER_PICT_OP_SRC, fill, c, 1, &rect);
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return fill;
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}
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XRenderPicture xRenderFill(const QColor &c)
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{
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return xRenderFill(preMultiply(c));
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}
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XRenderPicture xRenderBlendPicture(double opacity)
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{
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static xcb_render_color_t s_blendColor = {0, 0, 0, 0};
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s_blendColor.alpha = uint16_t(opacity * 0xffff);
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if (XRenderUtils::s_blendPicture == XCB_RENDER_PICTURE_NONE) {
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XRenderUtils::s_blendPicture = xRenderFill(s_blendColor);
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} else {
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xcb_rectangle_t rect = {0, 0, 1, 1};
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xcb_render_fill_rectangles(XRenderUtils::s_connection, XCB_RENDER_PICT_OP_SRC, XRenderUtils::s_blendPicture, s_blendColor, 1, &rect);
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}
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return XRenderUtils::s_blendPicture;
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}
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static xcb_render_picture_t createPicture(xcb_pixmap_t pix, int depth)
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{
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if (pix == XCB_PIXMAP_NONE)
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return XCB_RENDER_PICTURE_NONE;
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xcb_connection_t *c = XRenderUtils::s_connection;
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static QHash<int, xcb_render_pictformat_t> s_renderFormats;
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if (!s_renderFormats.contains(depth)) {
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xcb_render_query_pict_formats_reply_t *formats = xcb_render_query_pict_formats_reply(c, xcb_render_query_pict_formats_unchecked(c), nullptr);
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if (!formats) {
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return XCB_RENDER_PICTURE_NONE;
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}
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for (xcb_render_pictforminfo_iterator_t it = xcb_render_query_pict_formats_formats_iterator(formats);
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it.rem;
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xcb_render_pictforminfo_next(&it)) {
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if (it.data->depth == depth) {
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s_renderFormats.insert(depth, it.data->id);
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break;
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}
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}
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free(formats);
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}
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QHash<int, xcb_render_pictformat_t>::const_iterator it = s_renderFormats.constFind(depth);
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if (it == s_renderFormats.constEnd()) {
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qCWarning(LIBKWINXRENDERUTILS) << "Could not find XRender format for depth" << depth;
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return XCB_RENDER_PICTURE_NONE;
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}
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xcb_render_picture_t pic = xcb_generate_id(c);
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xcb_render_create_picture(c, pic, pix, it.value(), 0, nullptr);
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return pic;
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}
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XRenderPicture::XRenderPicture(const QImage &img)
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{
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fromImage(img);
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}
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void XRenderPicture::fromImage(const QImage &img)
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{
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xcb_connection_t *c = XRenderUtils::s_connection;
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const int depth = img.depth();
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xcb_pixmap_t xpix = xcb_generate_id(c);
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xcb_create_pixmap(c, depth, xpix, XRenderUtils::s_rootWindow, img.width(), img.height());
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xcb_gcontext_t cid = xcb_generate_id(c);
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xcb_create_gc(c, cid, xpix, 0, nullptr);
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xcb_put_image(c, XCB_IMAGE_FORMAT_Z_PIXMAP, xpix, cid, img.width(), img.height(),
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0, 0, 0, depth, img.sizeInBytes(), img.constBits());
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xcb_free_gc(c, cid);
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d = new XRenderPictureData(createPicture(xpix, depth));
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xcb_free_pixmap(c, xpix);
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}
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XRenderPicture::XRenderPicture(xcb_pixmap_t pix, int depth)
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: d(new XRenderPictureData(createPicture(pix, depth)))
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{
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}
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XRenderPictureData::~XRenderPictureData()
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{
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if (picture != XCB_RENDER_PICTURE_NONE) {
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Q_ASSERT(qApp);
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xcb_render_free_picture(XRenderUtils::s_connection, picture);
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}
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}
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XFixesRegion::XFixesRegion(const QRegion ®ion)
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{
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m_region = xcb_generate_id(XRenderUtils::s_connection);
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QVector<xcb_rectangle_t> xrects;
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xrects.reserve(region.rectCount());
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for (const QRect &rect : region) {
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xcb_rectangle_t xrect;
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xrect.x = rect.x();
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xrect.y = rect.y();
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xrect.width = rect.width();
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xrect.height = rect.height();
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xrects.append(xrect);
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}
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xcb_xfixes_create_region(XRenderUtils::s_connection, m_region, xrects.count(), xrects.constData());
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}
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XFixesRegion::~XFixesRegion()
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{
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xcb_xfixes_destroy_region(XRenderUtils::s_connection, m_region);
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}
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static xcb_render_picture_t s_offscreenTarget = XCB_RENDER_PICTURE_NONE;
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static QStack<XRenderPicture*> s_scene_offscreenTargetStack;
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static int s_renderOffscreen = 0;
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void scene_setXRenderOffscreenTarget(xcb_render_picture_t pix)
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{
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s_offscreenTarget = pix;
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}
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XRenderPicture *scene_xRenderOffscreenTarget()
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{
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return s_scene_offscreenTargetStack.isEmpty() ? nullptr : s_scene_offscreenTargetStack.top();
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}
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void setXRenderOffscreen(bool b)
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{
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b ? ++s_renderOffscreen : --s_renderOffscreen;
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if (s_renderOffscreen < 0) {
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s_renderOffscreen = 0;
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qCWarning(LIBKWINXRENDERUTILS) << "*** SOMETHING IS MESSED UP WITH YOUR setXRenderOffscreen() USAGE ***";
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}
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}
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void xRenderPushTarget(XRenderPicture *pic)
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{
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s_scene_offscreenTargetStack.push(pic);
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++s_renderOffscreen;
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}
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void xRenderPopTarget()
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{
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s_scene_offscreenTargetStack.pop();
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--s_renderOffscreen;
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if (s_renderOffscreen < 0) {
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s_renderOffscreen = 0;
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qCWarning(LIBKWINXRENDERUTILS) << "*** SOMETHING IS MESSED UP WITH YOUR xRenderPopTarget() USAGE ***";
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}
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}
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bool xRenderOffscreen()
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{
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return s_renderOffscreen;
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}
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xcb_render_picture_t xRenderOffscreenTarget()
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{
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return s_offscreenTarget;
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}
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namespace XRenderUtils
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{
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struct PictFormatData
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{
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PictFormatData() {
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// Fetch the render pict formats
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reply = xcb_render_query_pict_formats_reply(s_connection,
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xcb_render_query_pict_formats_unchecked(s_connection), nullptr);
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// Init the visual ID -> format ID hash table
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for (auto screens = xcb_render_query_pict_formats_screens_iterator(reply); screens.rem; xcb_render_pictscreen_next(&screens)) {
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for (auto depths = xcb_render_pictscreen_depths_iterator(screens.data); depths.rem; xcb_render_pictdepth_next(&depths)) {
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const xcb_render_pictvisual_t *visuals = xcb_render_pictdepth_visuals(depths.data);
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const int len = xcb_render_pictdepth_visuals_length(depths.data);
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for (int i = 0; i < len; i++)
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visualHash.insert(visuals[i].visual, visuals[i].format);
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}
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}
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// Init the format ID -> xcb_render_directformat_t* hash table
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const xcb_render_pictforminfo_t *formats = xcb_render_query_pict_formats_formats(reply);
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const int len = xcb_render_query_pict_formats_formats_length(reply);
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for (int i = 0; i < len; i++) {
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if (formats[i].type == XCB_RENDER_PICT_TYPE_DIRECT)
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formatInfoHash.insert(formats[i].id, &formats[i].direct);
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}
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}
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~PictFormatData() {
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free(reply);
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}
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xcb_render_query_pict_formats_reply_t *reply;
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QHash<xcb_visualid_t, xcb_render_pictformat_t> visualHash;
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QHash<xcb_render_pictformat_t, const xcb_render_directformat_t *> formatInfoHash;
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};
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Q_GLOBAL_STATIC(PictFormatData, g_pictFormatData)
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xcb_render_pictformat_t findPictFormat(xcb_visualid_t visual)
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{
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PictFormatData *d = g_pictFormatData;
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return d->visualHash.value(visual);
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}
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const xcb_render_directformat_t *findPictFormatInfo(xcb_render_pictformat_t format)
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{
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PictFormatData *d = g_pictFormatData;
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return d->formatInfoHash.value(format);
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}
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} // namespace XRenderUtils
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} // namespace KWin
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