OpenGL immediate mode: interface_draw.c (cont)

ui_draw_but_COLORBAND
Introduced a new checker shader to be used mostly on transparent areas.

OpenGL immediate mode: interface_draw.c (cont)

ui_draw_but_UNITVEC
Introduced a new shader to be used for simple lighting.

3 files changed, 54 insertions, 0 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_3D_vert.glsl b/source/blender/gpu/shaders/gpu_shader_3D_vert.glsl
index 32da3a99c63..58150c004e5 100644
--- a/source/blender/gpu/shaders/gpu_shader_3D_vert.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_3D_vert.glsl
@@ -1,13 +1,27 @@
 
 uniform mat4 ModelViewProjectionMatrix;
+#ifdef USE_NORMALS
+uniform mat3 NormalMatrix;
+#endif
 
 #if __VERSION__ == 120
   attribute vec3 pos;
+#ifdef USE_NORMALS
+  attribute vec3 nor;
+  varying vec3 normal;
+#endif
 #else
   in vec3 pos;
+#ifdef USE_NORMALS
+  in vec3 nor;
+  out vec3 normal;
+#endif
 #endif
 
 void main()
 {
+#ifdef USE_NORMALS
+	normal = normalize(NormalMatrix * nor);
+#endif
 	gl_Position = ModelViewProjectionMatrix * vec4(pos, 1.0);
 }
diff --git a/source/blender/gpu/shaders/gpu_shader_checker_frag.glsl b/source/blender/gpu/shaders/gpu_shader_checker_frag.glsl
new file mode 100644
index 00000000000..3b24af916a0
--- /dev/null
+++ b/source/blender/gpu/shaders/gpu_shader_checker_frag.glsl
@@ -0,0 +1,24 @@
+
+uniform vec4 color1;
+uniform vec4 color2;
+uniform int size;
+
+#if __VERSION__ == 120
+  #define fragColor gl_FragColor
+#else
+  out vec4 fragColor;
+#endif
+
+void main()
+{
+	vec2 phase = mod(gl_FragCoord.xy, (size*2));
+
+	if ((phase.x > size && phase.y < size) ||
+		(phase.x < size && phase.y > size))
+	{
+		fragColor = color1;
+	}
+	else {
+		fragColor = color2;
+	}
+}
diff --git a/source/blender/gpu/shaders/gpu_shader_simple_lighting_frag.glsl b/source/blender/gpu/shaders/gpu_shader_simple_lighting_frag.glsl
new file mode 100644
index 00000000000..9828787fb04
--- /dev/null
+++ b/source/blender/gpu/shaders/gpu_shader_simple_lighting_frag.glsl
@@ -0,0 +1,16 @@
+
+uniform vec4 color;
+uniform vec3 light;
+
+#if __VERSION__ == 120
+  varying vec3 normal;
+  #define fragColor gl_FragColor
+#else
+  in vec3 normal;
+  out vec4 fragColor;
+#endif
+
+void main()
+{
+	fragColor = color * max(0.0, dot(normalize(normal), light));
+}