1 files changed, 37 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/common/gpu_shader_common_color_ramp.glsl b/source/blender/gpu/shaders/common/gpu_shader_common_color_ramp.glsl
new file mode 100644
index 00000000000..17240da4050
--- /dev/null
+++ b/source/blender/gpu/shaders/common/gpu_shader_common_color_ramp.glsl
@@ -0,0 +1,37 @@
+void valtorgb_opti_constant(
+    float fac, float edge, vec4 color1, vec4 color2, out vec4 outcol, out float outalpha)
+{
+  outcol = (fac > edge) ? color2 : color1;
+  outalpha = outcol.a;
+}
+
+void valtorgb_opti_linear(
+    float fac, vec2 mulbias, vec4 color1, vec4 color2, out vec4 outcol, out float outalpha)
+{
+  fac = clamp(fac * mulbias.x + mulbias.y, 0.0, 1.0);
+  outcol = mix(color1, color2, fac);
+  outalpha = outcol.a;
+}
+
+void valtorgb_opti_ease(
+    float fac, vec2 mulbias, vec4 color1, vec4 color2, out vec4 outcol, out float outalpha)
+{
+  fac = clamp(fac * mulbias.x + mulbias.y, 0.0, 1.0);
+  fac = fac * fac * (3.0 - 2.0 * fac);
+  outcol = mix(color1, color2, fac);
+  outalpha = outcol.a;
+}
+
+void valtorgb(float fac, sampler1DArray colormap, float layer, out vec4 outcol, out float outalpha)
+{
+  outcol = texture(colormap, vec2(fac, layer));
+  outalpha = outcol.a;
+}
+
+void valtorgb_nearest(
+    float fac, sampler1DArray colormap, float layer, out vec4 outcol, out float outalpha)
+{
+  fac = clamp(fac, 0.0, 1.0);
+  outcol = texelFetch(colormap, ivec2(fac * (textureSize(colormap, 0).x - 1), layer), 0);
+  outalpha = outcol.a;
+}