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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
class ETC_Decoder
{
public:
enum InputType
{
ETC_R_SIGNED,
ETC_R_UNSIGNED,
ETC_RG_SIGNED,
ETC_RG_UNSIGNED,
ETC_RGB,
ETC_RGB_PUNCHTHROUGH_ALPHA,
ETC_RGBA
};
/// ETC_Decoder::Decode - Decodes 1 to 4 channel images to 8 bit output
/// @param src Pointer to ETC2 encoded image
/// @param dst Pointer to BGRA, 8 bit output
/// @param w src image width
/// @param h src image height
/// @param dstW dst image width
/// @param dstH dst image height
/// @param dstPitch dst image pitch (bytes per row)
/// @param dstBpp dst image bytes per pixel
/// @param inputType src's format
/// @return true if the decoding was performed
static bool Decode(const unsigned char *src, unsigned char *dst, int w, int h, int dstW, int dstH, int dstPitch, int dstBpp, InputType inputType);
};