// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
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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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class ETC_Decoder
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{
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public:
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enum InputType
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{
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ETC_R_SIGNED,
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ETC_R_UNSIGNED,
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ETC_RG_SIGNED,
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ETC_RG_UNSIGNED,
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ETC_RGB,
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ETC_RGB_PUNCHTHROUGH_ALPHA,
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ETC_RGBA
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};
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/// ETC_Decoder::Decode - Decodes 1 to 4 channel images to 8 bit output
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/// @param src Pointer to ETC2 encoded image
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/// @param dst Pointer to BGRA, 8 bit output
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/// @param w src image width
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/// @param h src image height
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/// @param dstW dst image width
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/// @param dstH dst image height
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/// @param dstPitch dst image pitch (bytes per row)
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/// @param dstBpp dst image bytes per pixel
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/// @param inputType src's format
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/// @return true if the decoding was performed
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static bool Decode(const unsigned char* src, unsigned char *dst, int w, int h, int dstW, int dstH, int dstPitch, int dstBpp, InputType inputType);
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};
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