1 files changed, 32 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/gpu_program_smoke_color_frag.glsl b/source/blender/gpu/shaders/gpu_program_smoke_color_frag.glsl
new file mode 100644
index 00000000000..a94c823f408
--- /dev/null
+++ b/source/blender/gpu/shaders/gpu_program_smoke_color_frag.glsl
@@ -0,0 +1,32 @@
+!!ARBfp1.0
+PARAM dx = program.local[0];
+PARAM darkness = program.local[1];
+PARAM render = program.local[2];
+PARAM f = {1.442695041, 1.442695041, 1.442695041, 1.442695041};
+TEMP temp, shadow, flame, spec, value;
+TEX temp, fragment.texcoord[0], texture[0], 3D;
+TEX shadow, fragment.texcoord[0], texture[1], 3D;
+TEX flame, fragment.texcoord[0], texture[2], 3D;
+TEX spec, flame.r, texture[3], 1D;
+# unpremultiply volume texture
+RCP value.r, temp.a;
+MUL temp.r, temp.r, value.r;
+MUL temp.g, temp.g, value.r;
+MUL temp.b, temp.b, value.r;
+# calculate shading factor from density
+MUL value.r, temp.a, darkness.a;
+MUL value.r, value.r, dx.r;
+MUL value.r, value.r, f.r;
+EX2 value.r, -value.r;
+# alpha
+SUB temp.a, 1.0, value.r;
+# shade colors
+MUL temp.r, temp.r, shadow.r;
+MUL temp.g, temp.g, shadow.r;
+MUL temp.b, temp.b, shadow.r;
+MUL temp.r, temp.r, value.r;
+MUL temp.g, temp.g, value.r;
+MUL temp.b, temp.b, value.r;
+# for now this just replace smoke shading if rendering fire
+CMP result.color, render.r, temp, spec;
+END