diff options
Diffstat (limited to 'intern/cycles/scene/constant_fold.cpp')
-rw-r--r-- | intern/cycles/scene/constant_fold.cpp | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/intern/cycles/scene/constant_fold.cpp b/intern/cycles/scene/constant_fold.cpp index 4bce5661f9b..1aa4515a087 100644 --- a/intern/cycles/scene/constant_fold.cpp +++ b/intern/cycles/scene/constant_fold.cpp @@ -291,6 +291,101 @@ void ConstantFolder::fold_mix(NodeMix type, bool clamp) const } } +void ConstantFolder::fold_mix_color(NodeMix type, bool clamp_factor, bool clamp) const +{ + ShaderInput *fac_in = node->input("Factor"); + ShaderInput *color1_in = node->input("A"); + ShaderInput *color2_in = node->input("B"); + + float fac = clamp_factor ? saturatef(node->get_float(fac_in->socket_type)) : + node->get_float(fac_in->socket_type); + bool fac_is_zero = !fac_in->link && fac == 0.0f; + bool fac_is_one = !fac_in->link && fac == 1.0f; + + /* remove no-op node when factor is 0.0 */ + if (fac_is_zero) { + /* note that some of the modes will clamp out of bounds values even without use_clamp */ + if (!(type == NODE_MIX_LIGHT || type == NODE_MIX_DODGE || type == NODE_MIX_BURN)) { + if (try_bypass_or_make_constant(color1_in, clamp)) { + return; + } + } + } + + switch (type) { + case NODE_MIX_BLEND: + /* remove useless mix colors nodes */ + if (color1_in->link && color2_in->link) { + if (color1_in->link == color2_in->link) { + try_bypass_or_make_constant(color1_in, clamp); + break; + } + } + else if (!color1_in->link && !color2_in->link) { + float3 color1 = node->get_float3(color1_in->socket_type); + float3 color2 = node->get_float3(color2_in->socket_type); + if (color1 == color2) { + try_bypass_or_make_constant(color1_in, clamp); + break; + } + } + /* remove no-op mix color node when factor is 1.0 */ + if (fac_is_one) { + try_bypass_or_make_constant(color2_in, clamp); + break; + } + break; + case NODE_MIX_ADD: + /* 0 + X (fac 1) == X */ + if (is_zero(color1_in) && fac_is_one) { + try_bypass_or_make_constant(color2_in, clamp); + } + /* X + 0 (fac ?) == X */ + else if (is_zero(color2_in)) { + try_bypass_or_make_constant(color1_in, clamp); + } + break; + case NODE_MIX_SUB: + /* X - 0 (fac ?) == X */ + if (is_zero(color2_in)) { + try_bypass_or_make_constant(color1_in, clamp); + } + /* X - X (fac 1) == 0 */ + else if (color1_in->link && color1_in->link == color2_in->link && fac_is_one) { + make_zero(); + } + break; + case NODE_MIX_MUL: + /* X * 1 (fac ?) == X, 1 * X (fac 1) == X */ + if (is_one(color1_in) && fac_is_one) { + try_bypass_or_make_constant(color2_in, clamp); + } + else if (is_one(color2_in)) { + try_bypass_or_make_constant(color1_in, clamp); + } + /* 0 * ? (fac ?) == 0, ? * 0 (fac 1) == 0 */ + else if (is_zero(color1_in)) { + make_zero(); + } + else if (is_zero(color2_in) && fac_is_one) { + make_zero(); + } + break; + case NODE_MIX_DIV: + /* X / 1 (fac ?) == X */ + if (is_one(color2_in)) { + try_bypass_or_make_constant(color1_in, clamp); + } + /* 0 / ? (fac ?) == 0 */ + else if (is_zero(color1_in)) { + make_zero(); + } + break; + default: + break; + } +} + void ConstantFolder::fold_math(NodeMathType type) const { ShaderInput *value1_in = node->input("Value1"); |