GPU: Split gpu_shader_material into multiple files.

This patch continue the efforts to split the `gpu_shader_material` file
started in D5569.

Dependency resolution is now recursive. Each shading node gets its own
file. Additionally, some utility files are added to be shared between
files, like `math_util`, `color_util`, and `hash`. Some files are always
included because they may be used in the execution function, like
`world_normals`.

Some glsl functions appeared to be unused, so they were removed, like
`output_node`, `bits_to_01`, and `exp_blender`. Other functions have
been renamed to be more general and get used as utils, like `texco_norm`
which became `vector_normalize`.

A lot of the opengl tests fails, but those same tests also fail in
master, so this is probably unrelated to this patch.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D5616

1 files changed, 61 insertions, 0 deletions

diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_tex_magic.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_tex_magic.glsl
new file mode 100644
index 00000000000..942c507cc38
--- /dev/null
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_tex_magic.glsl
@@ -0,0 +1,61 @@
+void node_tex_magic(
+    vec3 co, float scale, float distortion, float depth, out vec4 color, out float fac)
+{
+  vec3 p = co * scale;
+  float x = sin((p.x + p.y + p.z) * 5.0);
+  float y = cos((-p.x + p.y - p.z) * 5.0);
+  float z = -cos((-p.x - p.y + p.z) * 5.0);
+
+  if (depth > 0) {
+    x *= distortion;
+    y *= distortion;
+    z *= distortion;
+    y = -cos(x - y + z);
+    y *= distortion;
+    if (depth > 1) {
+      x = cos(x - y - z);
+      x *= distortion;
+      if (depth > 2) {
+        z = sin(-x - y - z);
+        z *= distortion;
+        if (depth > 3) {
+          x = -cos(-x + y - z);
+          x *= distortion;
+          if (depth > 4) {
+            y = -sin(-x + y + z);
+            y *= distortion;
+            if (depth > 5) {
+              y = -cos(-x + y + z);
+              y *= distortion;
+              if (depth > 6) {
+                x = cos(x + y + z);
+                x *= distortion;
+                if (depth > 7) {
+                  z = sin(x + y - z);
+                  z *= distortion;
+                  if (depth > 8) {
+                    x = -cos(-x - y + z);
+                    x *= distortion;
+                    if (depth > 9) {
+                      y = -sin(x - y + z);
+                      y *= distortion;
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+  if (distortion != 0.0) {
+    distortion *= 2.0;
+    x /= distortion;
+    y /= distortion;
+    z /= distortion;
+  }
+
+  color = vec4(0.5 - x, 0.5 - y, 0.5 - z, 1.0);
+  fac = (color.x + color.y + color.z) / 3.0;
+}