Add shader using Mali "dual texturing" of uniformsdualt

This triggers the bug fixed in the Bifrost compiler by
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18378

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/shaders/alyssa/dualtex.shader_test b/shaders/alyssa/dualtex.shader_test
new file mode 100644
index 0000000..59de789
--- /dev/null
+++ b/shaders/alyssa/dualtex.shader_test
@@ -0,0 +1,29 @@
+[require]
+GLSL >= 1.20
+
+[fragment shader]
+uniform sampler2D sampler0;
+uniform sampler2D sampler1;
+uniform sampler2D sampler2;
+uniform sampler2D sampler3;
+uniform vec2 u_texcoord;
+
+varying vec2 v_texcoord;
+
+void main()
+{
+	gl_FragColor = texture2D(sampler0, u_texcoord) + texture2D(sampler2, v_texcoord) +
+		       texture2D(sampler1, v_texcoord) + texture2D(sampler3, u_texcoord);
+}
+
+[vertex shader]
+#version 120
+
+varying vec2 v_texcoord;
+
+void main()
+{
+	gl_Position = gl_Vertex;
+	v_texcoord = (gl_Vertex.xy + vec2(1, 1)) / 2.0;
+}
+