diff options
author | Dalai Felinto <dfelinto@gmail.com> | 2011-12-17 00:35:06 +0400 |
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committer | Dalai Felinto <dfelinto@gmail.com> | 2011-12-17 00:35:06 +0400 |
commit | 2a6fdbcccdb285664d921d59f66f96d0345124de (patch) | |
tree | 3d7b8d41a05318d43821efe43548ac8df5162d78 /intern/cycles/kernel/svm/svm_gamma.h | |
parent | 3311164b24da61f2967f96d0ee27508a7e2e0267 (diff) |
Cycles Gamma Node
Node specially useful for Texture correction.
This is also a nice example of a simple node made from scratch in case someone wants to create their custom nodes.
Review by Brecht.
Diffstat (limited to 'intern/cycles/kernel/svm/svm_gamma.h')
-rw-r--r-- | intern/cycles/kernel/svm/svm_gamma.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_gamma.h b/intern/cycles/kernel/svm/svm_gamma.h new file mode 100644 index 00000000000..4a8967011c7 --- /dev/null +++ b/intern/cycles/kernel/svm/svm_gamma.h @@ -0,0 +1,37 @@ +/* + * Copyright 2011, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +CCL_NAMESPACE_BEGIN + +__device void svm_node_gamma(ShaderData *sd, float *stack, uint in_gamma, uint in_color, uint out_color) +{ + float3 color = stack_load_float3(stack, in_color); + float gamma = stack_load_float(stack, in_gamma); + + if (color.x > 0.0) + color.x = powf(color.x, gamma); + if (color.y > 0.0) + color.y = powf(color.y, gamma); + if (color.z > 0.0) + color.z = powf(color.z, gamma); + + if (stack_valid(out_color)) + stack_store_float3(stack, out_color, color); +} + +CCL_NAMESPACE_END |