[client] egl: move shaders into seperate files and build into objects

client/renderers/egl/shader/desktop.vert

@@ -0,0 +1,20 @@
+#version 300 es
+
+layout(location = 0) in vec3 vertexPosition_modelspace;
+layout(location = 1) in vec2 vertexUV;
+
+uniform vec4 position;
+
+out highp vec2 uv;
+
+void main()
+{
+  gl_Position.xyz = vertexPosition_modelspace; 
+  gl_Position.w   = 1.0;
+  gl_Position.x  -= position.x;
+  gl_Position.y  -= position.y;
+  gl_Position.x  *= position.z;
+  gl_Position.y  *= position.w;
+
+  uv = vertexUV;
+}

client/renderers/egl/shader/desktop_rgb.frag

@@ -0,0 +1,11 @@
+#version 300 es
+
+in  highp vec2 uv;
+out highp vec4 color;
+
+uniform sampler2D sampler1;
+
+void main()
+{
+  color = texture(sampler1, uv);
+}

client/renderers/egl/shader/desktop_yuv.frag

@@ -0,0 +1,27 @@
+#version 300 es
+
+in  highp vec2 uv;
+out highp vec4 color;
+
+uniform sampler2D sampler1;
+uniform sampler2D sampler2;
+uniform sampler2D sampler3;
+
+void main()
+{
+  highp vec4 yuv = vec4(
+    texture(sampler1, uv).r,
+    texture(sampler2, uv).r,
+    texture(sampler3, uv).r,
+    1.0
+  );
+  
+  highp mat4 yuv_to_rgb = mat4(
+    1.0,  0.0  ,  1.402, -0.701,
+    1.0, -0.344, -0.714,  0.529,
+    1.0,  1.772,  0.0  , -0.886,
+    1.0,  1.0  ,  1.0  ,  1.0
+  );
+  
+  color = yuv * yuv_to_rgb;
+}