forked from bartvdbraak/blender
Brecht Van Lommel
dd8016f708
This breaks backwards compatibility some in that 3 sides will be mapped differently now, but difficult to avoid and can be considered a bugfix.
334 lines
14 KiB
C
334 lines
14 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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CCL_NAMESPACE_BEGIN
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ccl_device float4 svm_image_texture(KernelGlobals *kg, int id, float x, float y, uint srgb, uint use_alpha)
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{
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#ifdef __KERNEL_CPU__
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float4 r = kernel_tex_image_interp(id, x, y);
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#elif defined(__KERNEL_OPENCL__)
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float4 r = kernel_tex_image_interp(kg, id, x, y);
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#else
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float4 r;
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# if __CUDA_ARCH__ < 300
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/* not particularly proud of this massive switch, what are the
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* alternatives?
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* - use a single big 1D texture, and do our own lookup/filtering
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* - group by size and use a 3d texture, performance impact
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* - group into larger texture with some padding for correct lerp
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*
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* also note that cuda has a textures limit (128 for Fermi, 256 for Kepler),
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* and we cannot use all since we still need some for other storage */
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switch(id) {
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case 0: r = kernel_tex_image_interp(__tex_image_float4_000, x, y); break;
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case 8: r = kernel_tex_image_interp(__tex_image_float4_008, x, y); break;
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case 16: r = kernel_tex_image_interp(__tex_image_float4_016, x, y); break;
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case 24: r = kernel_tex_image_interp(__tex_image_float4_024, x, y); break;
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case 32: r = kernel_tex_image_interp(__tex_image_float4_032, x, y); break;
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case 1: r = kernel_tex_image_interp(__tex_image_byte4_001, x, y); break;
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case 9: r = kernel_tex_image_interp(__tex_image_byte4_009, x, y); break;
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case 17: r = kernel_tex_image_interp(__tex_image_byte4_017, x, y); break;
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case 25: r = kernel_tex_image_interp(__tex_image_byte4_025, x, y); break;
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case 33: r = kernel_tex_image_interp(__tex_image_byte4_033, x, y); break;
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case 41: r = kernel_tex_image_interp(__tex_image_byte4_041, x, y); break;
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case 49: r = kernel_tex_image_interp(__tex_image_byte4_049, x, y); break;
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case 57: r = kernel_tex_image_interp(__tex_image_byte4_057, x, y); break;
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case 65: r = kernel_tex_image_interp(__tex_image_byte4_065, x, y); break;
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case 73: r = kernel_tex_image_interp(__tex_image_byte4_073, x, y); break;
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case 81: r = kernel_tex_image_interp(__tex_image_byte4_081, x, y); break;
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case 89: r = kernel_tex_image_interp(__tex_image_byte4_089, x, y); break;
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case 97: r = kernel_tex_image_interp(__tex_image_byte4_097, x, y); break;
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case 105: r = kernel_tex_image_interp(__tex_image_byte4_105, x, y); break;
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case 113: r = kernel_tex_image_interp(__tex_image_byte4_113, x, y); break;
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case 121: r = kernel_tex_image_interp(__tex_image_byte4_121, x, y); break;
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case 129: r = kernel_tex_image_interp(__tex_image_byte4_129, x, y); break;
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case 137: r = kernel_tex_image_interp(__tex_image_byte4_137, x, y); break;
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case 145: r = kernel_tex_image_interp(__tex_image_byte4_145, x, y); break;
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case 153: r = kernel_tex_image_interp(__tex_image_byte4_153, x, y); break;
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case 161: r = kernel_tex_image_interp(__tex_image_byte4_161, x, y); break;
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case 169: r = kernel_tex_image_interp(__tex_image_byte4_169, x, y); break;
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case 177: r = kernel_tex_image_interp(__tex_image_byte4_177, x, y); break;
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case 185: r = kernel_tex_image_interp(__tex_image_byte4_185, x, y); break;
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case 193: r = kernel_tex_image_interp(__tex_image_byte4_193, x, y); break;
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case 201: r = kernel_tex_image_interp(__tex_image_byte4_201, x, y); break;
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case 209: r = kernel_tex_image_interp(__tex_image_byte4_209, x, y); break;
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case 217: r = kernel_tex_image_interp(__tex_image_byte4_217, x, y); break;
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case 225: r = kernel_tex_image_interp(__tex_image_byte4_225, x, y); break;
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case 233: r = kernel_tex_image_interp(__tex_image_byte4_233, x, y); break;
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case 241: r = kernel_tex_image_interp(__tex_image_byte4_241, x, y); break;
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case 249: r = kernel_tex_image_interp(__tex_image_byte4_249, x, y); break;
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case 257: r = kernel_tex_image_interp(__tex_image_byte4_257, x, y); break;
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case 265: r = kernel_tex_image_interp(__tex_image_byte4_265, x, y); break;
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case 273: r = kernel_tex_image_interp(__tex_image_byte4_273, x, y); break;
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case 281: r = kernel_tex_image_interp(__tex_image_byte4_281, x, y); break;
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case 289: r = kernel_tex_image_interp(__tex_image_byte4_289, x, y); break;
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case 297: r = kernel_tex_image_interp(__tex_image_byte4_297, x, y); break;
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case 305: r = kernel_tex_image_interp(__tex_image_byte4_305, x, y); break;
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case 313: r = kernel_tex_image_interp(__tex_image_byte4_313, x, y); break;
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case 321: r = kernel_tex_image_interp(__tex_image_byte4_321, x, y); break;
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case 329: r = kernel_tex_image_interp(__tex_image_byte4_329, x, y); break;
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case 337: r = kernel_tex_image_interp(__tex_image_byte4_337, x, y); break;
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case 345: r = kernel_tex_image_interp(__tex_image_byte4_345, x, y); break;
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case 353: r = kernel_tex_image_interp(__tex_image_byte4_353, x, y); break;
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case 361: r = kernel_tex_image_interp(__tex_image_byte4_361, x, y); break;
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case 369: r = kernel_tex_image_interp(__tex_image_byte4_369, x, y); break;
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case 377: r = kernel_tex_image_interp(__tex_image_byte4_377, x, y); break;
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case 385: r = kernel_tex_image_interp(__tex_image_byte4_385, x, y); break;
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case 393: r = kernel_tex_image_interp(__tex_image_byte4_393, x, y); break;
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case 401: r = kernel_tex_image_interp(__tex_image_byte4_401, x, y); break;
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case 409: r = kernel_tex_image_interp(__tex_image_byte4_409, x, y); break;
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case 417: r = kernel_tex_image_interp(__tex_image_byte4_417, x, y); break;
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case 425: r = kernel_tex_image_interp(__tex_image_byte4_425, x, y); break;
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case 433: r = kernel_tex_image_interp(__tex_image_byte4_433, x, y); break;
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case 441: r = kernel_tex_image_interp(__tex_image_byte4_441, x, y); break;
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case 449: r = kernel_tex_image_interp(__tex_image_byte4_449, x, y); break;
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case 457: r = kernel_tex_image_interp(__tex_image_byte4_457, x, y); break;
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case 465: r = kernel_tex_image_interp(__tex_image_byte4_465, x, y); break;
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case 473: r = kernel_tex_image_interp(__tex_image_byte4_473, x, y); break;
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case 481: r = kernel_tex_image_interp(__tex_image_byte4_481, x, y); break;
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case 489: r = kernel_tex_image_interp(__tex_image_byte4_489, x, y); break;
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case 497: r = kernel_tex_image_interp(__tex_image_byte4_497, x, y); break;
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case 505: r = kernel_tex_image_interp(__tex_image_byte4_505, x, y); break;
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case 513: r = kernel_tex_image_interp(__tex_image_byte4_513, x, y); break;
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case 521: r = kernel_tex_image_interp(__tex_image_byte4_521, x, y); break;
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case 529: r = kernel_tex_image_interp(__tex_image_byte4_529, x, y); break;
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case 537: r = kernel_tex_image_interp(__tex_image_byte4_537, x, y); break;
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case 545: r = kernel_tex_image_interp(__tex_image_byte4_545, x, y); break;
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case 553: r = kernel_tex_image_interp(__tex_image_byte4_553, x, y); break;
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case 561: r = kernel_tex_image_interp(__tex_image_byte4_561, x, y); break;
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case 569: r = kernel_tex_image_interp(__tex_image_byte4_569, x, y); break;
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case 577: r = kernel_tex_image_interp(__tex_image_byte4_577, x, y); break;
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case 585: r = kernel_tex_image_interp(__tex_image_byte4_585, x, y); break;
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case 593: r = kernel_tex_image_interp(__tex_image_byte4_593, x, y); break;
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case 601: r = kernel_tex_image_interp(__tex_image_byte4_601, x, y); break;
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case 609: r = kernel_tex_image_interp(__tex_image_byte4_609, x, y); break;
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case 617: r = kernel_tex_image_interp(__tex_image_byte4_617, x, y); break;
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case 625: r = kernel_tex_image_interp(__tex_image_byte4_625, x, y); break;
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case 633: r = kernel_tex_image_interp(__tex_image_byte4_633, x, y); break;
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case 641: r = kernel_tex_image_interp(__tex_image_byte4_641, x, y); break;
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case 649: r = kernel_tex_image_interp(__tex_image_byte4_649, x, y); break;
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case 657: r = kernel_tex_image_interp(__tex_image_byte4_657, x, y); break;
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case 665: r = kernel_tex_image_interp(__tex_image_byte4_665, x, y); break;
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default:
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kernel_assert(0);
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return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
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}
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# else
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CUtexObject tex = kernel_tex_fetch(__bindless_mapping, id);
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/* float4, byte4 and half4 */
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const int texture_type = kernel_tex_type(id);
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if(texture_type == IMAGE_DATA_TYPE_FLOAT4 ||
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texture_type == IMAGE_DATA_TYPE_BYTE4 ||
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texture_type == IMAGE_DATA_TYPE_HALF4)
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{
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r = kernel_tex_image_interp_float4(tex, x, y);
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}
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/* float, byte and half */
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else {
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float f = kernel_tex_image_interp_float(tex, x, y);
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r = make_float4(f, f, f, 1.0f);
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}
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# endif
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#endif
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const float alpha = r.w;
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if(use_alpha && alpha != 1.0f && alpha != 0.0f) {
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r /= alpha;
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const int texture_type = kernel_tex_type(id);
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if(texture_type == IMAGE_DATA_TYPE_BYTE4 ||
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texture_type == IMAGE_DATA_TYPE_BYTE)
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{
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r = min(r, make_float4(1.0f, 1.0f, 1.0f, 1.0f));
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}
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r.w = alpha;
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}
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if(srgb) {
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r = color_srgb_to_scene_linear_v4(r);
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}
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return r;
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}
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/* Remap coordnate from 0..1 box to -1..-1 */
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ccl_device_inline float3 texco_remap_square(float3 co)
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{
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return (co - make_float3(0.5f, 0.5f, 0.5f)) * 2.0f;
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}
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ccl_device void svm_node_tex_image(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
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{
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uint id = node.y;
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uint co_offset, out_offset, alpha_offset, srgb;
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decode_node_uchar4(node.z, &co_offset, &out_offset, &alpha_offset, &srgb);
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float3 co = stack_load_float3(stack, co_offset);
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float2 tex_co;
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uint use_alpha = stack_valid(alpha_offset);
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if(node.w == NODE_IMAGE_PROJ_SPHERE) {
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co = texco_remap_square(co);
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tex_co = map_to_sphere(co);
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}
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else if(node.w == NODE_IMAGE_PROJ_TUBE) {
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co = texco_remap_square(co);
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tex_co = map_to_tube(co);
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}
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else {
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tex_co = make_float2(co.x, co.y);
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}
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float4 f = svm_image_texture(kg, id, tex_co.x, tex_co.y, srgb, use_alpha);
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if(stack_valid(out_offset))
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stack_store_float3(stack, out_offset, make_float3(f.x, f.y, f.z));
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if(stack_valid(alpha_offset))
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stack_store_float(stack, alpha_offset, f.w);
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}
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ccl_device void svm_node_tex_image_box(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
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{
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/* get object space normal */
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float3 N = sd->N;
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N = sd->N;
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object_inverse_normal_transform(kg, sd, &N);
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/* project from direction vector to barycentric coordinates in triangles */
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float3 signed_N = N;
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N.x = fabsf(N.x);
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N.y = fabsf(N.y);
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N.z = fabsf(N.z);
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N /= (N.x + N.y + N.z);
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/* basic idea is to think of this as a triangle, each corner representing
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* one of the 3 faces of the cube. in the corners we have single textures,
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* in between we blend between two textures, and in the middle we a blend
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* between three textures.
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*
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* the Nxyz values are the barycentric coordinates in an equilateral
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* triangle, which in case of blending, in the middle has a smaller
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* equilateral triangle where 3 textures blend. this divides things into
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* 7 zones, with an if() test for each zone */
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float3 weight = make_float3(0.0f, 0.0f, 0.0f);
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float blend = __int_as_float(node.w);
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float limit = 0.5f*(1.0f + blend);
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/* first test for corners with single texture */
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if(N.x > limit*(N.x + N.y) && N.x > limit*(N.x + N.z)) {
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weight.x = 1.0f;
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}
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else if(N.y > limit*(N.x + N.y) && N.y > limit*(N.y + N.z)) {
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weight.y = 1.0f;
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}
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else if(N.z > limit*(N.x + N.z) && N.z > limit*(N.y + N.z)) {
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weight.z = 1.0f;
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}
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else if(blend > 0.0f) {
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/* in case of blending, test for mixes between two textures */
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if(N.z < (1.0f - limit)*(N.y + N.x)) {
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weight.x = N.x/(N.x + N.y);
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weight.x = saturate((weight.x - 0.5f*(1.0f - blend))/blend);
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weight.y = 1.0f - weight.x;
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}
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else if(N.x < (1.0f - limit)*(N.y + N.z)) {
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weight.y = N.y/(N.y + N.z);
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weight.y = saturate((weight.y - 0.5f*(1.0f - blend))/blend);
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weight.z = 1.0f - weight.y;
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}
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else if(N.y < (1.0f - limit)*(N.x + N.z)) {
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weight.x = N.x/(N.x + N.z);
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weight.x = saturate((weight.x - 0.5f*(1.0f - blend))/blend);
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weight.z = 1.0f - weight.x;
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}
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else {
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/* last case, we have a mix between three */
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weight.x = ((2.0f - limit)*N.x + (limit - 1.0f))/(2.0f*limit - 1.0f);
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weight.y = ((2.0f - limit)*N.y + (limit - 1.0f))/(2.0f*limit - 1.0f);
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weight.z = ((2.0f - limit)*N.z + (limit - 1.0f))/(2.0f*limit - 1.0f);
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}
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}
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else {
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/* Desperate mode, no valid choice anyway, fallback to one side.*/
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weight.x = 1.0f;
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}
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/* now fetch textures */
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uint co_offset, out_offset, alpha_offset, srgb;
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decode_node_uchar4(node.z, &co_offset, &out_offset, &alpha_offset, &srgb);
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float3 co = stack_load_float3(stack, co_offset);
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uint id = node.y;
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float4 f = make_float4(0.0f, 0.0f, 0.0f, 0.0f);
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uint use_alpha = stack_valid(alpha_offset);
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/* Map so that no textures are flipped, rotation is somewhat arbitrary. */
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if(weight.x > 0.0f) {
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float2 uv = make_float2((signed_N.x < 0.0f)? 1.0f - co.y: co.y, co.z);
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f += weight.x*svm_image_texture(kg, id, uv.x, uv.y, srgb, use_alpha);
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}
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if(weight.y > 0.0f) {
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float2 uv = make_float2((signed_N.y > 0.0f)? 1.0f - co.x: co.x, co.z);
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f += weight.y*svm_image_texture(kg, id, uv.x, uv.y, srgb, use_alpha);
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}
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if(weight.z > 0.0f) {
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float2 uv = make_float2((signed_N.z > 0.0f)? 1.0f - co.y: co.y, co.x);
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f += weight.z*svm_image_texture(kg, id, uv.x, uv.y, srgb, use_alpha);
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}
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if(stack_valid(out_offset))
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stack_store_float3(stack, out_offset, make_float3(f.x, f.y, f.z));
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if(stack_valid(alpha_offset))
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stack_store_float(stack, alpha_offset, f.w);
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}
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ccl_device void svm_node_tex_environment(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
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{
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uint id = node.y;
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uint co_offset, out_offset, alpha_offset, srgb;
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uint projection = node.w;
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decode_node_uchar4(node.z, &co_offset, &out_offset, &alpha_offset, &srgb);
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float3 co = stack_load_float3(stack, co_offset);
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float2 uv;
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co = safe_normalize(co);
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if(projection == 0)
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uv = direction_to_equirectangular(co);
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else
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uv = direction_to_mirrorball(co);
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uint use_alpha = stack_valid(alpha_offset);
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float4 f = svm_image_texture(kg, id, uv.x, uv.y, srgb, use_alpha);
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if(stack_valid(out_offset))
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stack_store_float3(stack, out_offset, make_float3(f.x, f.y, f.z));
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if(stack_valid(alpha_offset))
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stack_store_float(stack, alpha_offset, f.w);
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}
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CCL_NAMESPACE_END
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