diff options
Diffstat (limited to 'intern/cycles/util/util_image.h')
-rw-r--r-- | intern/cycles/util/util_image.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/intern/cycles/util/util_image.h b/intern/cycles/util/util_image.h index 18876841b5b..85bdb0d8050 100644 --- a/intern/cycles/util/util_image.h +++ b/intern/cycles/util/util_image.h @@ -38,6 +38,68 @@ void util_image_resize_pixels(const vector<T>& input_pixels, size_t *output_height, size_t *output_depth); +/* Cast input pixel from unknown storage to float. */ +template<typename T> +inline float util_image_cast_to_float(T value); + +template<> +inline float util_image_cast_to_float(float value) +{ + return value; +} +template<> +inline float util_image_cast_to_float(uchar value) +{ + return (float)value / 255.0f; +} +template<> +inline float util_image_cast_to_float(uint16_t value) +{ + return (float)value / 65535.0f; +} +template<> +inline float util_image_cast_to_float(half value) +{ + return half_to_float(value); +} + +/* Cast float value to output pixel type. */ +template<typename T> +inline T util_image_cast_from_float(float value); + +template<> +inline float util_image_cast_from_float(float value) +{ + return value; +} +template<> +inline uchar util_image_cast_from_float(float value) +{ + if(value < 0.0f) { + return 0; + } + else if(value > (1.0f - 0.5f / 255.0f)) { + return 255; + } + return (uchar)((255.0f * value) + 0.5f); +} +template<> +inline uint16_t util_image_cast_from_float(float value) +{ + if(value < 0.0f) { + return 0; + } + else if(value > (1.0f - 0.5f / 65535.0f)) { + return 65535; + } + return (uint16_t)((65535.0f * value) + 0.5f); +} +template<> +inline half util_image_cast_from_float(float value) +{ + return float_to_half(value); +} + CCL_NAMESPACE_END #endif /* __UTIL_IMAGE_H__ */ |