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[QNX]Fix transparencies

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It is not guaranteed that buffers are cleared when they
are allocated. So don't use a buffer for the root window,
and clear buffers for the actual content.

Change-Id: I42939baec03fa05968c83bbf2739ab8d1d70c8be
Reviewed-by: Matt Hoosier <matt.hoosier@garmin.com>
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
This commit is contained in:
Andreas Holzammer 2013-08-20 09:35:21 +02:00 committed by The Qt Project
parent 9d0b190f4b
commit 5680484476
2 changed files with 16 additions and 31 deletions
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31
src/plugins/platforms/qnx/qqnxrootwindow.cpp
View File

@ -188,35 +188,8 @@ void QQnxRootWindow::makeTranslucent()
int result;
errno = 0;
result = screen_destroy_window_buffers(m_window);
if (result != 0) {
qFatal("QQnxRootWindow: failed to destroy window buffer, errno=%d", errno);
}
QRect geometry = m_screen->geometry();
errno = 0;
int val[2];
val[0] = geometry.width();
val[1] = geometry.height();
result = screen_set_window_property_iv(m_window, SCREEN_PROPERTY_BUFFER_SIZE, val);
if (result != 0) {
qFatal("QQnxRootWindow: failed to set window buffer size, errno=%d", errno);
}
errno = 0;
result = screen_create_window_buffers(m_window, 1);
if (result != 0) {
qFatal("QQNX: failed to create window buffer, errno=%d", errno);
}
// Install an alpha channel on the root window.
//
// This is necessary in order to avoid interfering with any particular
// toplevel widget's QQnxWindow window instance from showing transparent
// if it desires.
errno = 0;
val[0] = SCREEN_TRANSPARENCY_SOURCE_OVER;
result = screen_set_window_property_iv(m_window, SCREEN_PROPERTY_TRANSPARENCY, val);
const int val = SCREEN_TRANSPARENCY_DISCARD;
result = screen_set_window_property_iv(m_window, SCREEN_PROPERTY_TRANSPARENCY, &val);
if (result != 0) {
qFatal("QQnxRootWindow: failed to set window transparency, errno=%d", errno);
}

16
src/plugins/platforms/qnx/qqnxwindow.cpp
View File

@ -418,15 +418,27 @@ QQnxBuffer &QQnxWindow::renderBuffer()
// Get all buffers available for rendering
errno = 0;
screen_buffer_t buffers[MAX_BUFFER_COUNT];
const int result = screen_get_window_property_pv(m_window, SCREEN_PROPERTY_RENDER_BUFFERS, (void **)buffers);
int result = screen_get_window_property_pv(m_window, SCREEN_PROPERTY_RENDER_BUFFERS, (void **)buffers);
if (result != 0)
qFatal("QQnxWindow: failed to query window buffers, errno=%d", errno);
// Wrap each buffer
// Wrap each buffer and clear
for (int i = 0; i < MAX_BUFFER_COUNT; ++i) {
m_buffers[i] = QQnxBuffer(buffers[i]);
// Clear Buffer
errno = 0;
int bg[] = { SCREEN_BLIT_COLOR, 0x00000000, SCREEN_BLIT_END };
result = screen_fill(m_screen->nativeContext(), buffers[i], bg);
if (result != 0)
qFatal("QQnxWindow: failed to clear window buffer, errno=%d", errno);
}
errno = 0;
result = screen_flush_blits(m_screen->nativeContext(), 0);
if (result != 0)
qFatal("QQnxWindow: failed to flush blits, errno=%d", errno);
// Use the first available render buffer
m_currentBufferIndex = 0;
m_previousBufferIndex = -1;