diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbimage.cpp')
-rw-r--r-- | src/plugins/platforms/xcb/qxcbimage.cpp | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/qxcbimage.cpp b/src/plugins/platforms/xcb/qxcbimage.cpp new file mode 100644 index 0000000000..569e4fc4e4 --- /dev/null +++ b/src/plugins/platforms/xcb/qxcbimage.cpp @@ -0,0 +1,266 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qxcbimage.h" +#include <QtGui/QColor> +#include <QtGui/private/qimage_p.h> +#include <QtGui/private/qdrawhelper_p.h> +#ifdef XCB_USE_RENDER +#include <xcb/render.h> +// 'template' is used as a function argument name in xcb_renderutil.h +#define template template_param +// extern "C" is missing too +extern "C" { +#include <xcb/xcb_renderutil.h> +} +#undef template +#endif + +QT_BEGIN_NAMESPACE + +QImage::Format qt_xcb_imageFormatForVisual(QXcbConnection *connection, uint8_t depth, + const xcb_visualtype_t *visual) +{ + const xcb_format_t *format = connection->formatForDepth(depth); + + if (!visual || !format) + return QImage::Format_Invalid; + + if (depth == 32 && format->bits_per_pixel == 32 && visual->red_mask == 0xff0000 + && visual->green_mask == 0xff00 && visual->blue_mask == 0xff) + return QImage::Format_ARGB32_Premultiplied; + + if (depth == 24 && format->bits_per_pixel == 32 && visual->red_mask == 0xff0000 + && visual->green_mask == 0xff00 && visual->blue_mask == 0xff) + return QImage::Format_RGB32; + + if (depth == 16 && format->bits_per_pixel == 16 && visual->red_mask == 0xf800 + && visual->green_mask == 0x7e0 && visual->blue_mask == 0x1f) + return QImage::Format_RGB16; + + return QImage::Format_Invalid; +} + +QPixmap qt_xcb_pixmapFromXPixmap(QXcbConnection *connection, xcb_pixmap_t pixmap, + int width, int height, int depth, + const xcb_visualtype_t *visual) +{ + xcb_connection_t *conn = connection->xcb_connection(); + xcb_generic_error_t *error = 0; + + xcb_get_image_cookie_t get_image_cookie = + xcb_get_image(conn, XCB_IMAGE_FORMAT_Z_PIXMAP, pixmap, + 0, 0, width, height, 0xffffffff); + + xcb_get_image_reply_t *image_reply = + xcb_get_image_reply(conn, get_image_cookie, &error); + + if (!image_reply) { + if (error) { + connection->handleXcbError(error); + free(error); + } + return QPixmap(); + } + + uint8_t *data = xcb_get_image_data(image_reply); + uint32_t length = xcb_get_image_data_length(image_reply); + + QPixmap result; + + QImage::Format format = qt_xcb_imageFormatForVisual(connection, depth, visual); + if (format != QImage::Format_Invalid) { + uint32_t bytes_per_line = length / height; + QImage image(const_cast<uint8_t *>(data), width, height, bytes_per_line, format); + uint8_t image_byte_order = connection->setup()->image_byte_order; + + // we may have to swap the byte order + if ((QSysInfo::ByteOrder == QSysInfo::LittleEndian && image_byte_order == XCB_IMAGE_ORDER_MSB_FIRST) + || (QSysInfo::ByteOrder == QSysInfo::BigEndian && image_byte_order == XCB_IMAGE_ORDER_LSB_FIRST)) + { + for (int i=0; i < image.height(); i++) { + switch (format) { + case QImage::Format_RGB16: { + ushort *p = (ushort*)image.scanLine(i); + ushort *end = p + image.width(); + while (p < end) { + *p = ((*p << 8) & 0xff00) | ((*p >> 8) & 0x00ff); + p++; + } + break; + } + case QImage::Format_RGB32: // fall-through + case QImage::Format_ARGB32_Premultiplied: { + uint *p = (uint*)image.scanLine(i); + uint *end = p + image.width(); + while (p < end) { + *p = ((*p << 24) & 0xff000000) | ((*p << 8) & 0x00ff0000) + | ((*p >> 8) & 0x0000ff00) | ((*p >> 24) & 0x000000ff); + p++; + } + break; + } + default: + Q_ASSERT(false); + } + } + } + + // fix-up alpha channel + if (format == QImage::Format_RGB32) { + QRgb *p = (QRgb *)image.bits(); + for (int y = 0; y < height; ++y) { + for (int x = 0; x < width; ++x) + p[x] |= 0xff000000; + p += bytes_per_line / 4; + } + } + + result = QPixmap::fromImage(image.copy()); + } + + free(image_reply); + return result; +} + +xcb_pixmap_t qt_xcb_XPixmapFromBitmap(QXcbScreen *screen, const QImage &image) +{ + xcb_connection_t *conn = screen->xcb_connection(); + QImage bitmap = image.convertToFormat(QImage::Format_MonoLSB); + const QRgb c0 = QColor(Qt::black).rgb(); + const QRgb c1 = QColor(Qt::white).rgb(); + if (bitmap.color(0) == c0 && bitmap.color(1) == c1) { + bitmap.invertPixels(); + bitmap.setColor(0, c1); + bitmap.setColor(1, c0); + } + const int width = bitmap.width(); + const int height = bitmap.height(); + const int bytesPerLine = bitmap.bytesPerLine(); + int destLineSize = width / 8; + if (width % 8) + ++destLineSize; + const uchar *map = bitmap.bits(); + uint8_t *buf = new uint8_t[height * destLineSize]; + for (int i = 0; i < height; i++) + memcpy(buf + (destLineSize * i), map + (bytesPerLine * i), destLineSize); + xcb_pixmap_t pm = xcb_create_pixmap_from_bitmap_data(conn, screen->root(), buf, + width, height, 1, 0, 0, 0); + delete[] buf; + return pm; +} + +xcb_cursor_t qt_xcb_createCursorXRender(QXcbScreen *screen, const QImage &image, + const QPoint &spot) +{ +#ifdef XCB_USE_RENDER + xcb_connection_t *conn = screen->xcb_connection(); + const int w = image.width(); + const int h = image.height(); + xcb_generic_error_t *error = 0; + xcb_render_query_pict_formats_cookie_t formatsCookie = xcb_render_query_pict_formats(conn); + xcb_render_query_pict_formats_reply_t *formatsReply = xcb_render_query_pict_formats_reply(conn, + formatsCookie, + &error); + if (!formatsReply || error) { + qWarning("createCursorXRender: query_pict_formats failed"); + free(formatsReply); + free(error); + return XCB_NONE; + } + xcb_render_pictforminfo_t *fmt = xcb_render_util_find_standard_format(formatsReply, + XCB_PICT_STANDARD_ARGB_32); + if (!fmt) { + qWarning("createCursorXRender: Failed to find format PICT_STANDARD_ARGB_32"); + free(formatsReply); + return XCB_NONE; + } + + QImage img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied); + xcb_image_t *xi = xcb_image_create(w, h, XCB_IMAGE_FORMAT_Z_PIXMAP, + 32, 32, 32, 32, + QSysInfo::ByteOrder == QSysInfo::BigEndian ? XCB_IMAGE_ORDER_MSB_FIRST : XCB_IMAGE_ORDER_LSB_FIRST, + XCB_IMAGE_ORDER_MSB_FIRST, + 0, 0, 0); + if (!xi) { + qWarning("createCursorXRender: xcb_image_create failed"); + free(formatsReply); + return XCB_NONE; + } + xi->data = (uint8_t *) malloc(xi->stride * h); + if (!xi->data) { + qWarning("createCursorXRender: Failed to malloc() image data"); + xcb_image_destroy(xi); + free(formatsReply); + return XCB_NONE; + } + memcpy(xi->data, img.constBits(), img.byteCount()); + + xcb_pixmap_t pix = xcb_generate_id(conn); + xcb_create_pixmap(conn, 32, pix, screen->root(), w, h); + + xcb_render_picture_t pic = xcb_generate_id(conn); + xcb_render_create_picture(conn, pic, pix, fmt->id, 0, 0); + + xcb_gcontext_t gc = xcb_generate_id(conn); + xcb_create_gc(conn, gc, pix, 0, 0); + xcb_image_put(conn, pix, gc, xi, 0, 0, 0); + xcb_free_gc(conn, gc); + + xcb_cursor_t cursor = xcb_generate_id(conn); + xcb_render_create_cursor(conn, cursor, pic, spot.x(), spot.y()); + + free(xi->data); + xcb_image_destroy(xi); + xcb_render_free_picture(conn, pic); + xcb_free_pixmap(conn, pix); + free(formatsReply); + return cursor; + +#else + Q_UNUSED(screen); + Q_UNUSED(image); + Q_UNUSED(spot); + return XCB_NONE; +#endif +} + +QT_END_NAMESPACE |