dba4684f82
This is the groundwork for supporting loading image textures with arbitrary color spaces through OpenColorIO. Initial patch by Lukas, completed by Brecht. Differential Revision: https://developer.blender.org/D3491
99 lines
2.7 KiB
C++
99 lines
2.7 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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#ifndef __UTIL_IMAGE_H__
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# define __UTIL_IMAGE_H__
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/* OpenImageIO is used for all image file reading and writing. */
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# include <OpenImageIO/imageio.h>
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# include "util/util_half.h"
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# include "util/util_vector.h"
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CCL_NAMESPACE_BEGIN
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OIIO_NAMESPACE_USING
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template<typename T>
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void util_image_resize_pixels(const vector<T> &input_pixels,
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const size_t input_width,
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const size_t input_height,
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const size_t input_depth,
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const size_t components,
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vector<T> *output_pixels,
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size_t *output_width,
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size_t *output_height,
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size_t *output_depth);
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/* Cast input pixel from unknown storage to float. */
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template<typename T> inline float util_image_cast_to_float(T value);
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template<> inline float util_image_cast_to_float(float value)
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{
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return value;
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}
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template<> inline float util_image_cast_to_float(uchar value)
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{
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return (float)value / 255.0f;
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}
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template<> inline float util_image_cast_to_float(uint16_t value)
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{
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return (float)value / 65535.0f;
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}
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template<> inline float util_image_cast_to_float(half value)
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{
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return half_to_float(value);
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}
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/* Cast float value to output pixel type. */
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template<typename T> inline T util_image_cast_from_float(float value);
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template<> inline float util_image_cast_from_float(float value)
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{
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return value;
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}
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template<> inline uchar util_image_cast_from_float(float value)
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{
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if (value < 0.0f) {
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return 0;
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}
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else if (value > (1.0f - 0.5f / 255.0f)) {
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return 255;
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}
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return (uchar)((255.0f * value) + 0.5f);
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}
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template<> inline uint16_t util_image_cast_from_float(float value)
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{
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if (value < 0.0f) {
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return 0;
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}
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else if (value > (1.0f - 0.5f / 65535.0f)) {
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return 65535;
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}
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return (uint16_t)((65535.0f * value) + 0.5f);
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}
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template<> inline half util_image_cast_from_float(float value)
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{
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return float_to_half(value);
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}
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CCL_NAMESPACE_END
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#endif /* __UTIL_IMAGE_H__ */
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#include "util/util_image_impl.h"
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