Updated lib_ui sources to TDesktop version 2.8.11

ui/gl/gl_detection.cpp

@@ -6,6 +6,7 @@
 //
 #include "ui/gl/gl_detection.h"
 
+#include "ui/gl/gl_shader.h"
 #include "ui/integration.h"
 #include "base/debug_log.h"
 
@@ -87,6 +88,22 @@ Capabilities CheckCapabilities(QWidget *widget) {
 		LOG_ONCE(("OpenGL: Shaders not supported."));
 		return {};
 	}
+	{
+		auto program = QOpenGLShaderProgram();
+		LinkProgram(
+			&program,
+			VertexShader({
+				VertexViewportTransform(),
+				VertexPassTextureCoord(),
+			}),
+			FragmentShader({
+				FragmentSampleARGB32Texture(),
+			}));
+		if (!program.isLinked()) {
+			LOG_ONCE(("OpenGL: Could not link simple shader."));
+			return {};
+		}
+	}
 	const auto supported = context->format();
 	switch (supported.profile()) {
 	case QSurfaceFormat::NoProfile: {

ui/style/style_core_custom_font.cpp

@@ -9,6 +9,7 @@
 #include "ui/style/style_core_font.h"
 #include "ui/integration.h"
 
+#include <QGuiApplication>
 #include <QFontDatabase>
 
 namespace style {
@@ -37,7 +38,7 @@ QFont ResolveFont(uint32 flags, int size) {
 	const auto &custom = bold ? BoldFont : RegularFont;
 	const auto useCustom = !custom.family.isEmpty();
 
-	auto result = QFont();
+	auto result = QFont(QGuiApplication::font().family());
 	if (flags & FontMonospace) {
 		result.setFamily(MonospaceFont());
 	} else if (useCustom) {