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104 lines
4.0 KiB
C++
104 lines
4.0 KiB
C++
/*
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Copyright (c) 2013, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <cstdint>
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struct rgba_surface
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{
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uint8_t* ptr;
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int32_t width;
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int32_t height;
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int32_t stride;
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};
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struct bc7_enc_settings
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{
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bool mode_selection[4];
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int refineIterations[8];
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bool skip_mode2;
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int fastSkipTreshold_mode1;
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int fastSkipTreshold_mode3;
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int fastSkipTreshold_mode7;
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int mode45_channel0;
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int refineIterations_channel;
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int channels;
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};
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struct bc6h_enc_settings
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{
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bool slow_mode;
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bool fast_mode;
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int refineIterations_1p;
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int refineIterations_2p;
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int fastSkipTreshold;
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};
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// profiles for RGB data (alpha channel will be ignored)
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extern "C" void GetProfile_ultrafast(bc7_enc_settings* settings);
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extern "C" void GetProfile_veryfast(bc7_enc_settings* settings);
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extern "C" void GetProfile_fast(bc7_enc_settings* settings);
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extern "C" void GetProfile_basic(bc7_enc_settings* settings);
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extern "C" void GetProfile_slow(bc7_enc_settings* settings);
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// profiles for RGBA inputs
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extern "C" void GetProfile_alpha_ultrafast(bc7_enc_settings* settings);
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extern "C" void GetProfile_alpha_veryfast(bc7_enc_settings* settings);
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extern "C" void GetProfile_alpha_fast(bc7_enc_settings* settings);
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extern "C" void GetProfile_alpha_basic(bc7_enc_settings* settings);
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extern "C" void GetProfile_alpha_slow(bc7_enc_settings* settings);
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// profiles for BC6H (RGB HDR)
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extern "C" void GetProfile_bc6h_veryfast(bc6h_enc_settings* settings);
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extern "C" void GetProfile_bc6h_fast(bc6h_enc_settings* settings);
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extern "C" void GetProfile_bc6h_basic(bc6h_enc_settings* settings);
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extern "C" void GetProfile_bc6h_slow(bc6h_enc_settings* settings);
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extern "C" void GetProfile_bc6h_veryslow(bc6h_enc_settings* settings);
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/*
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Notes:
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- input width and height need to be a multiple of 4
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- dst buffer must be allocated with enough space for the compressed texture:
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(width/4)*(height/4) blocks, 4 bytes/block for BC1, 8 bytes/block for BC7/BC6H
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the blocks are stored in raster scan order (natural CPU texture layout)
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- you can use GetProfile_* functions to select various speed/quality tradeoffs.
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- the RGB profiles are slightly faster as they ignore the alpha channel
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*/
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extern "C" void CompressBlocksBC1(const rgba_surface* src, uint8_t* dst);
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extern "C" void CompressBlocksBC3(const rgba_surface* src, uint8_t* dst);
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extern "C" void CompressBlocksBC6H(const rgba_surface* src, uint8_t* dst, bc6h_enc_settings* settings);
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extern "C" void CompressBlocksBC7(const rgba_surface* src, uint8_t* dst, bc7_enc_settings* settings);
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