Add support for MSAA modes from Layer.multisampleAA

Task-number: QT3DS-329
Change-Id: I5101754ef5946c303d8fa3a667995ff33d966fde
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/runtime/shaders/compositor_ms4.frag b/src/runtime/shaders/compositor_ms4.frag
new file mode 100644
index 0000000..1fa7c47
--- /dev/null
+++ b/src/runtime/shaders/compositor_ms4.frag
@@ -0,0 +1,14 @@
+#version 310 es
+
+in vec2 texCoord;
+
+uniform sampler2DMS tex;
+
+out vec4 fragColor;
+
+void main()
+{
+    ivec2 tc = ivec2(floor(textureSize(tex) * texCoord));
+    vec4 c = texelFetch(tex, tc, 0) + texelFetch(tex, tc, 1) + texelFetch(tex, tc, 2) + texelFetch(tex, tc, 3);
+    fragColor = c / 4.0;
+}