1 files changed, 36 insertions, 0 deletions
diff --git a/sway/desktop/shaders/tex.frag b/sway/desktop/shaders/tex.frag
new file mode 100644
index 00000000..3f529137
--- /dev/null
+++ b/sway/desktop/shaders/tex.frag
@@ -0,0 +1,36 @@
+/* enum wlr_gles2_shader_source */
+#define SOURCE_TEXTURE_RGBA 1
+#define SOURCE_TEXTURE_RGBX 2
+#define SOURCE_TEXTURE_EXTERNAL 3
+
+#if !defined(SOURCE)
+#error "Missing shader preamble"
+#endif
+
+#if SOURCE == SOURCE_TEXTURE_EXTERNAL
+#extension GL_OES_EGL_image_external : require
+#endif
+
+precision mediump float;
+
+varying vec2 v_texcoord;
+
+#if SOURCE == SOURCE_TEXTURE_EXTERNAL
+uniform samplerExternalOES tex;
+#elif SOURCE == SOURCE_TEXTURE_RGBA || SOURCE == SOURCE_TEXTURE_RGBX
+uniform sampler2D tex;
+#endif
+
+uniform float alpha;
+
+vec4 sample_texture() {
+#if SOURCE == SOURCE_TEXTURE_RGBA || SOURCE == SOURCE_TEXTURE_EXTERNAL
+    return texture2D(tex, v_texcoord);
+#elif SOURCE == SOURCE_TEXTURE_RGBX
+    return vec4(texture2D(tex, v_texcoord).rgb, 1.0);
+#endif
+}
+
+void main() {
+    gl_FragColor = sample_texture() * alpha;
+}