forked from bartvdbraak/blender
Brecht Van Lommel
7aaa7aa9dd
This also replaces the Use Alpha setting. We now have these alpha modes: * Straight: store RGB and alpha channels separately with alpha acting as a mask, also known as unassociated alpha. * Premultiplied: transparent RGB pixels are multiplied by the alpha channel. The natural format for renders. * Channel Packed: different images are packed in the RGB and alpha channels, and they should not influence each other. Channel packing is commonly used by game engines to save memory. * None: ignore alpha channel from the file and make image fully opaque. Cycles OSL does not correctly support Channel Packed and None yet, we are missing fine control over the OpenImageIO texture cache to do that. Fixes T53672
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*
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* Copyright 2011-2016 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_TEXTURE_H__
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#define __UTIL_TEXTURE_H__
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CCL_NAMESPACE_BEGIN
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/* Texture limits on devices. */
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#define TEX_NUM_MAX (INT_MAX >> 4)
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/* Color to use when textures are not found. */
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#define TEX_IMAGE_MISSING_R 1
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#define TEX_IMAGE_MISSING_G 0
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#define TEX_IMAGE_MISSING_B 1
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#define TEX_IMAGE_MISSING_A 1
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/* Texture type. */
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#define kernel_tex_type(tex) (tex & IMAGE_DATA_TYPE_MASK)
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/* Interpolation types for textures
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* cuda also use texture space to store other objects */
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typedef enum InterpolationType {
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INTERPOLATION_NONE = -1,
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INTERPOLATION_LINEAR = 0,
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INTERPOLATION_CLOSEST = 1,
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INTERPOLATION_CUBIC = 2,
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INTERPOLATION_SMART = 3,
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INTERPOLATION_NUM_TYPES,
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} InterpolationType;
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/* Texture types
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* Since we store the type in the lower bits of a flat index,
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* the shift and bit mask constant below need to be kept in sync. */
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typedef enum ImageDataType {
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IMAGE_DATA_TYPE_FLOAT4 = 0,
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IMAGE_DATA_TYPE_BYTE4 = 1,
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IMAGE_DATA_TYPE_HALF4 = 2,
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IMAGE_DATA_TYPE_FLOAT = 3,
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IMAGE_DATA_TYPE_BYTE = 4,
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IMAGE_DATA_TYPE_HALF = 5,
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IMAGE_DATA_TYPE_USHORT4 = 6,
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IMAGE_DATA_TYPE_USHORT = 7,
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IMAGE_DATA_NUM_TYPES
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} ImageDataType;
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/* Alpha types
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* How to treat alpha in images. */
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typedef enum ImageAlphaType {
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IMAGE_ALPHA_UNASSOCIATED = 0,
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IMAGE_ALPHA_ASSOCIATED = 1,
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IMAGE_ALPHA_CHANNEL_PACKED = 2,
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IMAGE_ALPHA_IGNORE = 3,
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IMAGE_ALPHA_AUTO = 4,
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IMAGE_ALPHA_NUM_TYPES,
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} ImageAlphaType;
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#define IMAGE_DATA_TYPE_SHIFT 3
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#define IMAGE_DATA_TYPE_MASK 0x7
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/* Extension types for textures.
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*
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* Defines how the image is extrapolated past its original bounds. */
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typedef enum ExtensionType {
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/* Cause the image to repeat horizontally and vertically. */
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EXTENSION_REPEAT = 0,
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/* Extend by repeating edge pixels of the image. */
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EXTENSION_EXTEND = 1,
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/* Clip to image size and set exterior pixels as transparent. */
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EXTENSION_CLIP = 2,
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EXTENSION_NUM_TYPES,
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} ExtensionType;
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typedef struct TextureInfo {
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/* Pointer, offset or texture depending on device. */
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uint64_t data;
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/* Buffer number for OpenCL. */
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uint cl_buffer;
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/* Interpolation and extension type. */
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uint interpolation, extension;
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/* Dimensions. */
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uint width, height, depth;
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} TextureInfo;
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CCL_NAMESPACE_END
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#endif /* __UTIL_TEXTURE_H__ */
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