From 328f2f9c35f3cc5e7049a060a608c3f72876484a Mon Sep 17 00:00:00 2001
From: Laszlo Agocs <laszlo.agocs@digia.com>
Date: Mon, 6 Jan 2014 14:51:37 +0100
Subject: eglfs: Move reusable functionality to eglconvenience
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The cursor implementation is generic GL(ES) code that should be shared
by all the present and future egl-based embedded platform
plugins. Follow the pattern of QEGLPlatformContext and move this class
into eglconvenience as QEGLPlatformCursor.

Similarly, the common bits from the context implementation context are
moved back to EGLPlatformContext.

eglconvenience has now base classes for integration, screen, window,
etc. too. By using these, eglfs becomes much smaller and cleaner. This
also paves the way for creating new, separate EGL-based platform
plugins for Android, embedded Linux, etc.

Also added some documentation to each of the base classes.

devicediscovery is now fixed to be usable on any platform. The
implementation in this case is naturally a dummy one. This finally
allows using it from anywhere without myriads of ugly ifdefs.

Change-Id: I02946e360c04e02de7fe234a23a08320eff4ccf5
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
---
 .../eglconvenience/qeglconvenience.cpp             | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)

(limited to 'src/platformsupport/eglconvenience/qeglconvenience.cpp')

diff --git a/src/platformsupport/eglconvenience/qeglconvenience.cpp b/src/platformsupport/eglconvenience/qeglconvenience.cpp
index fe6ba2b215..6c2cc4a186 100644
--- a/src/platformsupport/eglconvenience/qeglconvenience.cpp
+++ b/src/platformsupport/eglconvenience/qeglconvenience.cpp
@@ -41,6 +41,12 @@
 
 #include <QByteArray>
 
+#ifdef Q_OS_UNIX
+#include <sys/ioctl.h>
+#include <linux/fb.h>
+#include <private/qmath_p.h>
+#endif
+
 #include "qeglconvenience_p.h"
 
 QT_BEGIN_NAMESPACE
@@ -427,4 +433,106 @@ void q_printEglConfig(EGLDisplay display, EGLConfig config)
     qWarning("\n");
 }
 
+#ifdef Q_OS_UNIX
+
+QSizeF q_physicalScreenSizeFromFb(int framebufferDevice)
+{
+    const int defaultPhysicalDpi = 100;
+    static QSizeF size;
+
+    if (size.isEmpty()) {
+        // Note: in millimeters
+        int width = qgetenv("QT_QPA_EGLFS_PHYSICAL_WIDTH").toInt();
+        int height = qgetenv("QT_QPA_EGLFS_PHYSICAL_HEIGHT").toInt();
+
+        if (width && height) {
+            size.setWidth(width);
+            size.setHeight(height);
+            return size;
+        }
+
+        struct fb_var_screeninfo vinfo;
+        int w = -1;
+        int h = -1;
+        QSize screenResolution;
+
+        if (framebufferDevice != -1) {
+            if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1) {
+                qWarning("eglconvenience: Could not query screen info");
+            } else {
+                w = vinfo.width;
+                h = vinfo.height;
+                screenResolution = QSize(vinfo.xres, vinfo.yres);
+            }
+        } else {
+            screenResolution = q_screenSizeFromFb(framebufferDevice);
+        }
+
+        size.setWidth(w <= 0 ? screenResolution.width() * Q_MM_PER_INCH / defaultPhysicalDpi : qreal(w));
+        size.setHeight(h <= 0 ? screenResolution.height() * Q_MM_PER_INCH / defaultPhysicalDpi : qreal(h));
+    }
+
+    return size;
+}
+
+QSize q_screenSizeFromFb(int framebufferDevice)
+{
+    const int defaultWidth = 800;
+    const int defaultHeight = 600;
+    static QSize size;
+
+    if (size.isEmpty()) {
+        int width = qgetenv("QT_QPA_EGLFS_WIDTH").toInt();
+        int height = qgetenv("QT_QPA_EGLFS_HEIGHT").toInt();
+
+        if (width && height) {
+            size.setWidth(width);
+            size.setHeight(height);
+            return size;
+        }
+
+        struct fb_var_screeninfo vinfo;
+        int xres = -1;
+        int yres = -1;
+
+        if (framebufferDevice != -1) {
+            if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1) {
+                qWarning("eglconvenience: Could not read screen info");
+            } else {
+                xres = vinfo.xres;
+                yres = vinfo.yres;
+            }
+        }
+
+        size.setWidth(xres <= 0 ? defaultWidth : xres);
+        size.setHeight(yres <= 0 ? defaultHeight : yres);
+    }
+
+    return size;
+}
+
+int q_screenDepthFromFb(int framebufferDevice)
+{
+    const int defaultDepth = 32;
+    static int depth = qgetenv("QT_QPA_EGLFS_DEPTH").toInt();
+
+    if (depth == 0) {
+        struct fb_var_screeninfo vinfo;
+
+        if (framebufferDevice != -1) {
+            if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) == -1)
+                qWarning("eglconvenience: Could not query screen info");
+            else
+                depth = vinfo.bits_per_pixel;
+        }
+
+        if (depth <= 0)
+            depth = defaultDepth;
+    }
+
+    return depth;
+}
+
+#endif // Q_OS_UNIX
+
 QT_END_NAMESPACE
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