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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2008-2018 NVIDIA Corporation. All rights reserved.
#include <RendererTexture.h>
#include <RendererTextureDesc.h>
#include "foundation/PxMath.h"
using namespace SampleRenderer;
static PxU32 computeCompressedDimension(PxU32 dimension)
{
if(dimension < 4)
{
dimension = 4;
}
else
{
PxU32 mod = dimension % 4;
if(mod) dimension += 4 - mod;
}
return dimension;
}
PxU32 RendererTexture::computeImageByteSize(PxU32 width, PxU32 height, PxU32 depth, RendererTexture::Format format)
{
PxU32 size = 0;
PxU32 numPixels = width * height * depth;
switch(format)
{
case RendererTexture::FORMAT_B8G8R8A8:
case RendererTexture::FORMAT_R8G8B8A8:
size = numPixels * sizeof(PxU8) * 4;
break;
case RendererTexture::FORMAT_A8:
size = numPixels * sizeof(PxU8) * 1;
break;
case RendererTexture::FORMAT_R32F:
size = numPixels * sizeof(float);
break;
case RendererTexture::FORMAT_DXT1:
width = computeCompressedDimension(width);
height = computeCompressedDimension(height);
size = computeImageByteSize(width, height, depth, RendererTexture::FORMAT_B8G8R8A8) / 8;
break;
case RendererTexture::FORMAT_DXT3:
case RendererTexture::FORMAT_DXT5:
width = computeCompressedDimension(width);
height = computeCompressedDimension(height);
size = computeImageByteSize(width, height, depth, RendererTexture::FORMAT_B8G8R8A8) / 4;
break;
case RendererTexture::FORMAT_PVR_2BPP:
{
PxU32 bytesPerBlock = 8 * 4 * 2; //8 by 4 pixels times bytes per pixel
width = PxMax(PxI32(width / 8), 2);
height = PxMax(PxI32(height / 4), 2);
size = width*height*bytesPerBlock / 8;
}
break;
case RendererTexture::FORMAT_PVR_4BPP:
{
PxU32 bytesPerBlock = 4 * 4 * 4; //4 by 4 pixels times bytes per pixel
width = PxMax(PxI32(width / 4), 2);
height = PxMax(PxI32(height / 4), 2);
size = width*height*bytesPerBlock / 8;
}
break;
default: break;
}
RENDERER_ASSERT(size, "Unable to compute Image Size.");
return size;
}
PxU32 RendererTexture::getLevelDimension(PxU32 dimension, PxU32 level)
{
dimension >>=level;
if(!dimension) dimension=1;
return dimension;
}
bool RendererTexture::isCompressedFormat(Format format)
{
return (format >= FORMAT_DXT1 && format <= FORMAT_DXT5) || (format == FORMAT_PVR_2BPP) || (format == FORMAT_PVR_4BPP);
}
bool RendererTexture::isDepthStencilFormat(Format format)
{
return (format >= FORMAT_D16 && format <= FORMAT_D24S8);
}
PxU32 RendererTexture::getFormatNumBlocks(PxU32 dimension, Format format)
{
PxU32 blockDimension = 0;
if(isCompressedFormat(format))
{
blockDimension = dimension / 4;
if(dimension % 4) blockDimension++;
}
else
{
blockDimension = dimension;
}
return blockDimension;
}
PxU32 RendererTexture::getFormatBlockSize(Format format)
{
return computeImageByteSize(1, 1, 1, format);
}
RendererTexture::RendererTexture(const RendererTextureDesc &desc)
{
m_format = desc.format;
m_filter = desc.filter;
m_addressingU = desc.addressingU;
m_addressingV = desc.addressingV;
m_width = desc.width;
m_height = desc.height;
m_depth = desc.depth;
m_numLevels = desc.numLevels;
}
RendererTexture::~RendererTexture(void)
{
}
PxU32 RendererTexture::getWidthInBlocks(void) const
{
return getFormatNumBlocks(getWidth(), getFormat());
}
PxU32 RendererTexture::getHeightInBlocks(void) const
{
return getFormatNumBlocks(getHeight(), getFormat());
}
PxU32 RendererTexture::getBlockSize(void) const
{
return getFormatBlockSize(getFormat());
}
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