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-rw-r--r--src/gui/egl/qegl.cpp163
-rw-r--r--src/gui/egl/qegl_p.h15
-rw-r--r--src/gui/egl/qeglproperties.cpp10
3 files changed, 188 insertions, 0 deletions
diff --git a/src/gui/egl/qegl.cpp b/src/gui/egl/qegl.cpp
index ef30029..8bd4d7f 100644
--- a/src/gui/egl/qegl.cpp
+++ b/src/gui/egl/qegl.cpp
@@ -88,6 +88,169 @@ bool QEglContext::isCurrent() const
return current;
}
+EGLConfig QEgl::defaultConfig(QPaintDevice* device, API api, ConfigOptions options)
+{
+ int devType = device->devType();
+
+ if ( (devType != QInternal::Pixmap) && ((options & Renderable) == 0))
+ qWarning("QEgl::defaultConfig() - Only configs for pixmaps make sense to be read-only!");
+
+ EGLConfig* targetConfig = 0;
+
+ static EGLConfig defaultVGConfigs[] = {
+ QEGL_NO_CONFIG, // 0 Window Renderable Translucent
+ QEGL_NO_CONFIG, // 1 Window Renderable Opaque
+ QEGL_NO_CONFIG, // 2 Pixmap Renderable Translucent
+ QEGL_NO_CONFIG, // 3 Pixmap Renderable Opaque
+ QEGL_NO_CONFIG, // 4 Pixmap ReadOnly Translucent
+ QEGL_NO_CONFIG // 5 Pixmap ReadOnly Opaque
+ };
+ if (api == OpenVG) {
+ if (devType == QInternal::Widget) {
+ if (options & Translucent)
+ targetConfig = &(defaultVGConfigs[0]);
+ else
+ targetConfig = &(defaultVGConfigs[1]);
+ } else if (devType == QInternal::Pixmap) {
+ if (options & Renderable) {
+ if (options & Translucent)
+ targetConfig = &(defaultVGConfigs[2]);
+ else // Opaque
+ targetConfig = &(defaultVGConfigs[3]);
+ } else { // Read-only
+ if (options & Translucent)
+ targetConfig = &(defaultVGConfigs[4]);
+ else // Opaque
+ targetConfig = &(defaultVGConfigs[5]);
+ }
+ }
+ }
+
+
+ static EGLConfig defaultGLConfigs[] = {
+ QEGL_NO_CONFIG, // 0 Window Renderable Translucent
+ QEGL_NO_CONFIG, // 1 Window Renderable Opaque
+ QEGL_NO_CONFIG, // 2 PBuffer Renderable Translucent
+ QEGL_NO_CONFIG, // 3 PBuffer Renderable Opaque
+ QEGL_NO_CONFIG, // 4 Pixmap Renderable Translucent
+ QEGL_NO_CONFIG, // 5 Pixmap Renderable Opaque
+ QEGL_NO_CONFIG, // 6 Pixmap ReadOnly Translucent
+ QEGL_NO_CONFIG // 7 Pixmap ReadOnly Opaque
+ };
+ if (api == OpenGL) {
+ if (devType == QInternal::Widget) {
+ if (options & Translucent)
+ targetConfig = &(defaultGLConfigs[0]);
+ else // Opaque
+ targetConfig = &(defaultGLConfigs[1]);
+ } else if (devType == QInternal::Pbuffer) {
+ if (options & Translucent)
+ targetConfig = &(defaultGLConfigs[2]);
+ else // Opaque
+ targetConfig = &(defaultGLConfigs[3]);
+ } else if (devType == QInternal::Pixmap) {
+ if (options & Renderable) {
+ if (options & Translucent)
+ targetConfig = &(defaultGLConfigs[4]);
+ else // Opaque
+ targetConfig = &(defaultGLConfigs[5]);
+ } else { // ReadOnly
+ if (options & Translucent)
+ targetConfig = &(defaultGLConfigs[6]);
+ else // Opaque
+ targetConfig = &(defaultGLConfigs[7]);
+ }
+ }
+ }
+
+ if (!targetConfig) {
+ qWarning("QEgl::defaultConfig() - No default config for device/api/options combo");
+ return QEGL_NO_CONFIG;
+ }
+ if (*targetConfig != QEGL_NO_CONFIG)
+ return *targetConfig;
+
+
+ // We haven't found an EGL config for the target config yet, so do it now:
+
+
+ // Allow overriding from an environment variable:
+ QByteArray configId;
+ if (api == OpenVG)
+ configId = qgetenv("QT_VG_EGL_CONFIG");
+ else
+ configId = qgetenv("QT_GL_EGL_CONFIG");
+ if (!configId.isEmpty()) {
+ // Overriden, so get the EGLConfig for the specified config ID:
+ EGLint properties[] = {
+ EGL_CONFIG_ID, (EGLint)configId.toInt(),
+ EGL_NONE
+ };
+ EGLint configCount = 0;
+ eglChooseConfig(display(), properties, targetConfig, 1, &configCount);
+ if (configCount > 0)
+ return *targetConfig;
+ qWarning() << "QEgl::defaultConfig() -" << configId << "appears to be invalid";
+ }
+
+ QEglProperties configAttribs;
+ configAttribs.setRenderableType(api);
+
+ EGLint surfaceType;
+ switch (devType) {
+ case QInternal::Widget:
+ surfaceType = EGL_WINDOW_BIT;
+ break;
+ case QInternal::Pixmap:
+ surfaceType = EGL_PIXMAP_BIT;
+ break;
+ case QInternal::Pbuffer:
+ surfaceType = EGL_PBUFFER_BIT;
+ break;
+ default:
+ qWarning("QEgl::defaultConfig() - Can't create EGL surface for %d device type", devType);
+ return QEGL_NO_CONFIG;
+ };
+#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
+ // For OpenVG, we try to create a surface using a pre-multiplied format if
+ // the surface needs to have an alpha channel:
+ if (api == OpenVG && (options & Translucent))
+ surfaceType |= EGL_VG_ALPHA_FORMAT_PRE_BIT;
+#endif
+ configAttribs.setValue(EGL_SURFACE_TYPE, surfaceType);
+
+#ifdef EGL_BIND_TO_TEXTURE_RGBA
+ if (devType == QInternal::Pixmap || devType == QInternal::Pbuffer) {
+ if (options & Translucent)
+ configAttribs.setValue(EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE);
+ else
+ configAttribs.setValue(EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE);
+ }
+#endif
+
+ // Add paint engine requirements
+ if (api == OpenVG) {
+#ifndef QVG_SCISSOR_CLIP
+ configAttribs.setValue(EGL_ALPHA_MASK_SIZE, 1);
+#endif
+ } else {
+ // Both OpenGL paint engines need to have stencil and sample buffers
+ configAttribs.setValue(EGL_STENCIL_SIZE, 1);
+ configAttribs.setValue(EGL_SAMPLE_BUFFERS, 1);
+#ifndef QT_OPENGL_ES_2
+ // Aditionally, the GL1 engine likes to have a depth buffer for clipping
+ configAttribs.setValue(EGL_DEPTH_SIZE, 1);
+#endif
+ }
+
+ // Finally, set the color format based on the device:
+ configAttribs.setPaintDeviceFormat(device);
+
+ *targetConfig = chooseConfig(&configAttribs, QEgl::BestPixelFormat);
+ return *targetConfig;
+}
+
+
// Choose a configuration that matches "properties".
EGLConfig QEgl::chooseConfig(const QEglProperties* properties, QEgl::PixelFormatMatch match)
{
diff --git a/src/gui/egl/qegl_p.h b/src/gui/egl/qegl_p.h
index 8a9d815..1a5e4c0 100644
--- a/src/gui/egl/qegl_p.h
+++ b/src/gui/egl/qegl_p.h
@@ -114,6 +114,21 @@ namespace QEgl {
BestPixelFormat
};
+ enum ConfigOptions
+ {
+ Opaque = 0x00,
+ Translucent = 0x01,
+
+ ReadOnly = 0x00,
+ Renderable = 0x02 // Config will be compatable with the paint engines (VG or GL)
+ };
+
+ // Most of the time we use the same config for things like widgets & pixmaps, so rather than
+ // go through the eglChooseConfig loop every time, we use defaultConfig, which will return
+ // the config for a particular device/api/option combo. This function assumes that once a
+ // config is chosen for a particular combo, it's safe to always use that combo.
+ Q_GUI_EXPORT EGLConfig defaultConfig(QPaintDevice* device, API api, ConfigOptions options);
+
Q_GUI_EXPORT EGLConfig chooseConfig(const QEglProperties* configAttribs, QEgl::PixelFormatMatch match = QEgl::ExactPixelFormat);
Q_GUI_EXPORT EGLSurface createSurface(QPaintDevice *device, EGLConfig cfg, const QEglProperties *surfaceAttribs = 0);
diff --git a/src/gui/egl/qeglproperties.cpp b/src/gui/egl/qeglproperties.cpp
index 86e158b..e0e8481 100644
--- a/src/gui/egl/qeglproperties.cpp
+++ b/src/gui/egl/qeglproperties.cpp
@@ -230,6 +230,16 @@ void QEglProperties::setRenderableType(QEgl::API api)
// reductions in complexity are possible.
bool QEglProperties::reduceConfiguration()
{
+#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
+ // For OpenVG, we sometimes try to create a surface using a pre-multiplied format. If we can't
+ // find a config which supports pre-multiplied formats, remove the flag on the surface type:
+ EGLint surfaceType = value(EGL_SURFACE_TYPE);
+ if (surfaceType & EGL_VG_ALPHA_FORMAT_PRE_BIT) {
+ surfaceType ^= EGL_VG_ALPHA_FORMAT_PRE_BIT;
+ setValue(EGL_SURFACE_TYPE, surfaceType);
+ return true;
+ }
+#endif
// EGL chooses configs with the highest color depth over
// those with smaller (but faster) lower color depths. One
// way around this is to set EGL_BUFFER_SIZE to 16, which
generated by cgit v0.12 at 2024-09-25 20:17:27 (GMT)