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platform hooks: provide defaults for screen size and depth hooks

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Default hooks for querying screen size and color depth based on linux
fbdev API.

Change-Id: I7fc75c0df5e0f507cf679439416fe68c8f62f91d
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>
This commit is contained in:
Johannes Zellner 2012-06-18 15:18:43 -07:00 committed by Qt by Nokia
parent 95427b0f40
commit e7836e6a9a
1 changed files with 42 additions and 2 deletions
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44
src/plugins/platforms/eglfs/qeglfshooks_stub.cpp
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@ -41,6 +41,11 @@
#include "qeglfshooks.h"
#include <fcntl.h>
#include <unistd.h>
#include <linux/fb.h>
#include <sys/ioctl.h>
QT_BEGIN_NAMESPACE
void QEglFSHooks::platformInit()
@ -58,13 +63,48 @@ EGLNativeDisplayType QEglFSHooks::platformDisplay() const
QSize QEglFSHooks::screenSize() const
{
return QSize();
static QSize size;
if (size.isEmpty()) {
struct fb_var_screeninfo vinfo;
int fd = open("/dev/fb0", O_RDONLY);
if (fd != -1) {
if (ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) == -1)
qWarning("Could not query variable screen info.");
else
size = QSize(vinfo.xres, vinfo.yres);
close(fd);
} else {
qWarning("Failed to open /dev/fb0 to detect screen resolution.");
}
}
return size;
}
int QEglFSHooks::screenDepth() const
{
static int depth = qgetenv("QT_QPA_EGLFS_DEPTH").toInt();
return depth == 16 ? 16 : 32;
if (depth == 0) {
struct fb_var_screeninfo vinfo;
int fd = open("/dev/fb0", O_RDONLY);
if (fd != -1) {
if (ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) == -1)
qWarning("Could not query variable screen info.");
else
depth = vinfo.bits_per_pixel;
close(fd);
} else {
qWarning("Failed to open /dev/fb0 to detect screen depth.");
}
}
return depth == 0 ? 32 : depth;
}
QImage::Format QEglFSHooks::screenFormat() const