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290 lines
8.9 KiB
C++
290 lines
8.9 KiB
C++
// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#include "CompressorRGB.h"
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#include "CompressionOptions.h"
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#include "OutputOptions.h"
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#include <nvimage/Image.h>
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#include <nvimage/FloatImage.h>
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#include <nvimage/PixelFormat.h>
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#include <nvmath/Color.h>
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#include <nvmath/Half.h>
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#include <nvcore/Debug.h>
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using namespace nv;
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using namespace nvtt;
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namespace
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{
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inline uint computePitch(uint w, uint bitsize, uint alignment)
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{
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return ((w * bitsize + 8 * alignment - 1) / (8 * alignment)) * alignment;
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}
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inline void convert_to_a8r8g8b8(const void * src, void * dst, uint w)
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{
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memcpy(dst, src, 4 * w);
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}
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inline void convert_to_x8r8g8b8(const void * src, void * dst, uint w)
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{
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memcpy(dst, src, 4 * w);
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}
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static uint16 to_half(float f)
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{
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union { float f; uint32 u; } c;
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c.f = f;
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return half_from_float(c.u);
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}
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struct BitStream
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{
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BitStream(uint8 * ptr) : ptr(ptr), buffer(0), bits(0) {
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}
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void putBits(uint p, int bitCount)
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{
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nvDebugCheck(bits < 8);
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nvDebugCheck(bitCount <= 32);
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uint64 buffer = (this->buffer << bitCount) | p;
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uint bits = this->bits + bitCount;
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while (bits >= 8)
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{
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*ptr++ = (buffer & 0xFF);
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buffer >>= 8;
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bits -= 8;
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}
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this->buffer = (uint8)buffer;
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this->bits = bits;
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}
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void putFloat(float f)
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{
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nvDebugCheck(bits == 0);
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*((float *)ptr) = f;
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ptr += 4;
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}
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void putHalf(float f)
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{
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nvDebugCheck(bits == 0);
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*((uint16 *)ptr) = to_half(f);
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ptr += 2;
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}
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void flush()
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{
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nvDebugCheck(bits < 8);
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if (bits) {
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*ptr++ = buffer;
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buffer = 0;
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bits = 0;
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}
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}
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void align(int alignment)
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{
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nvDebugCheck(alignment >= 1);
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flush();
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putBits(0, ((size_t)ptr % alignment) * 8);
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}
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uint8 * ptr;
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uint8 buffer;
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uint8 bits;
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};
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} // namespace
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void PixelFormatConverter::compress(nvtt::InputFormat inputFormat, nvtt::AlphaMode alphaMode, uint w, uint h, const void * data, const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions)
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{
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uint bitCount;
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uint rmask, rshift, rsize;
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uint gmask, gshift, gsize;
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uint bmask, bshift, bsize;
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uint amask, ashift, asize;
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if (compressionOptions.pixelType == nvtt::PixelType_Float)
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{
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rsize = compressionOptions.rsize;
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gsize = compressionOptions.gsize;
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bsize = compressionOptions.bsize;
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asize = compressionOptions.asize;
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nvCheck(rsize == 0 || rsize == 16 || rsize == 32);
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nvCheck(gsize == 0 || gsize == 16 || gsize == 32);
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nvCheck(bsize == 0 || bsize == 16 || bsize == 32);
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nvCheck(asize == 0 || asize == 16 || asize == 32);
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bitCount = rsize + gsize + bsize + asize;
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}
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else
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{
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if (compressionOptions.bitcount != 0)
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{
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bitCount = compressionOptions.bitcount;
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nvCheck(bitCount <= 32);
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rmask = compressionOptions.rmask;
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gmask = compressionOptions.gmask;
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bmask = compressionOptions.bmask;
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amask = compressionOptions.amask;
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PixelFormat::maskShiftAndSize(rmask, &rshift, &rsize);
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PixelFormat::maskShiftAndSize(gmask, &gshift, &gsize);
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PixelFormat::maskShiftAndSize(bmask, &bshift, &bsize);
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PixelFormat::maskShiftAndSize(amask, &ashift, &asize);
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}
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else
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{
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rsize = compressionOptions.rsize;
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gsize = compressionOptions.gsize;
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bsize = compressionOptions.bsize;
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asize = compressionOptions.asize;
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bitCount = rsize + gsize + bsize + asize;
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nvCheck(bitCount <= 32);
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ashift = 0;
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bshift = ashift + asize;
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gshift = bshift + bsize;
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rshift = gshift + gsize;
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rmask = ((1 << rsize) - 1) << rshift;
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gmask = ((1 << gsize) - 1) << gshift;
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bmask = ((1 << bsize) - 1) << bshift;
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amask = ((1 << asize) - 1) << ashift;
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}
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}
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const uint pitch = computePitch(w, bitCount, compressionOptions.pitchAlignment);
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const uint wh = w * h;
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// Allocate output scanline.
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uint8 * const dst = (uint8 *)mem::malloc(pitch);
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for (uint y = 0; y < h; y++)
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{
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const uint * src = (const uint *)data + y * w;
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const float * fsrc = (const float *)data + y * w;
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if (inputFormat == nvtt::InputFormat_BGRA_8UB && compressionOptions.pixelType == nvtt::PixelType_UnsignedNorm && bitCount == 32 && rmask == 0xFF0000 && gmask == 0xFF00 && bmask == 0xFF && amask == 0xFF000000)
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{
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convert_to_a8r8g8b8(src, dst, w);
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}
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else
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{
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BitStream stream(dst);
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for (uint x = 0; x < w; x++)
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{
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float r, g, b, a;
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if (inputFormat == nvtt::InputFormat_BGRA_8UB) {
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Color32 c = Color32(src[x]);
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r = float(c.r) / 255.0f;
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g = float(c.g) / 255.0f;
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b = float(c.b) / 255.0f;
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a = float(c.a) / 255.0f;
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}
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else {
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nvDebugCheck (inputFormat == nvtt::InputFormat_RGBA_32F);
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//r = ((float *)src)[4 * x + 0]; // Color components not interleaved.
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//g = ((float *)src)[4 * x + 1];
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//b = ((float *)src)[4 * x + 2];
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//a = ((float *)src)[4 * x + 3];
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r = fsrc[x + 0 * wh];
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g = fsrc[x + 1 * wh];
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b = fsrc[x + 2 * wh];
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a = fsrc[x + 3 * wh];
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}
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if (compressionOptions.pixelType == nvtt::PixelType_Float)
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{
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if (rsize == 32) stream.putFloat(r);
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else if (rsize == 16) stream.putHalf(r);
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if (gsize == 32) stream.putFloat(g);
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else if (gsize == 16) stream.putHalf(g);
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if (bsize == 32) stream.putFloat(b);
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else if (bsize == 16) stream.putHalf(b);
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if (asize == 32) stream.putFloat(a);
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else if (asize == 16) stream.putHalf(a);
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}
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else
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{
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Color32 c;
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if (compressionOptions.pixelType == nvtt::PixelType_UnsignedNorm) {
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c.r = uint8(clamp(r * 255, 0.0f, 255.0f));
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c.g = uint8(clamp(g * 255, 0.0f, 255.0f));
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c.b = uint8(clamp(b * 255, 0.0f, 255.0f));
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c.a = uint8(clamp(a * 255, 0.0f, 255.0f));
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}
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// @@ Add support for nvtt::PixelType_SignedInt, nvtt::PixelType_SignedNorm, nvtt::PixelType_UnsignedInt
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uint p = 0;
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p |= PixelFormat::convert(c.r, 8, rsize) << rshift;
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p |= PixelFormat::convert(c.g, 8, gsize) << gshift;
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p |= PixelFormat::convert(c.b, 8, bsize) << bshift;
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p |= PixelFormat::convert(c.a, 8, asize) << ashift;
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stream.putBits(p, bitCount);
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// Output one byte at a time.
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/*for (uint i = 0; i < byteCount; i++)
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{
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*(dst + x * byteCount + i) = (p >> (i * 8)) & 0xFF;
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}*/
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}
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}
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// Zero padding.
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stream.align(compressionOptions.pitchAlignment);
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nvDebugCheck(stream.ptr == dst + pitch);
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/*for (uint x = w * byteCount; x < pitch; x++)
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{
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*(dst + x) = 0;
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}*/
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}
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outputOptions.writeData(dst, pitch);
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}
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mem::free(dst);
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}
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