105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#pragma once
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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/half.h"
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#include "util/vector.h"
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CCL_NAMESPACE_BEGIN
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using OIIO::AutoStride;
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using OIIO::ImageInput;
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using OIIO::ImageOutput;
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using OIIO::ImageSpec;
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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 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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/* 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(const 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(const 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(const 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_image(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(const float value);
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template<> inline float util_image_cast_from_float(const 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(const 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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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); // NOLINT
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}
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template<> inline uint16_t util_image_cast_from_float(const 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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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); // NOLINT
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}
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template<> inline half util_image_cast_from_float(const float value)
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{
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return float_to_half_image(value);
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}
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/* Multiply image pixels in native data format. */
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template<typename T> inline T util_image_multiply_native(T a, T b);
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template<> inline float util_image_multiply_native(const float a, const float b)
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{
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return a * b;
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}
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template<> inline uchar util_image_multiply_native(const uchar a, const uchar b)
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{
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return ((uint32_t)a * (uint32_t)b) / 255;
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}
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template<> inline uint16_t util_image_multiply_native(const uint16_t a, const uint16_t b)
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{
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return ((uint32_t)a * (uint32_t)b) / 65535;
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}
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template<> inline half util_image_multiply_native(half a, half b)
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{
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return float_to_half_image(half_to_float_image(a) * half_to_float_image(b));
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}
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CCL_NAMESPACE_END
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#include "util/image_impl.h" // IWYU pragma: export
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