OpenGL: new built-in shaders for drawing points

Both of these draw round points with jaggy edges, but treat color & size differently.

1 files changed, 21 insertions, 0 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_point_varying_color_frag.glsl b/source/blender/gpu/shaders/gpu_shader_point_varying_color_frag.glsl
new file mode 100644
index 00000000000..91092a9f727
--- /dev/null
+++ b/source/blender/gpu/shaders/gpu_shader_point_varying_color_frag.glsl
@@ -0,0 +1,21 @@
+
+#if __VERSION__ == 120
+  varying vec4 finalColor;
+  #define fragColor gl_FragColor
+#else
+  in vec4 finalColor;
+  out vec4 fragColor;
+#endif
+
+void main()
+{
+	vec2 centered = gl_PointCoord - vec2(0.5);
+	float dist_squared = dot(centered, centered);
+	const float rad_squared = 0.25;
+
+	// round point with jaggy edges
+	if (dist_squared > rad_squared)
+		discard;
+
+	fragColor = finalColor;
+}