1117 lines
33 KiB
C++
1117 lines
33 KiB
C++
//-------------------------------------------------------------------------------------
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// DirectXTexHDR.cpp
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//
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// DirectX Texture Library - Radiance HDR (RGBE) file format reader/writer
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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//
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// http://go.microsoft.com/fwlink/?LinkId=248926
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//-------------------------------------------------------------------------------------
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#include "DirectXTexp.h"
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//
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// In theory HDR (RGBE) Radiance files can have any of the following data orientations
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//
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// +X width +Y height
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// +X width -Y height
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// -X width +Y height
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// -X width -Y height
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// +Y height +X width
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// -Y height +X width
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// +Y height -X width
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// -Y height -X width
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//
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// All HDR files we've encountered are always written as "-Y height +X width", so
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// we support only that one as that's what other Radiance parsing code does as well.
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//
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//Uncomment to disable the use of adapative RLE encoding when writing an HDR. Used for testing only.
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//#define DISABLE_COMPRESS
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//Uncomment to use "old colors" standard RLE encoding when writing an HDR. Used for testing only.
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//#define WRITE_OLD_COLORS
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using namespace DirectX;
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namespace
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{
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const char g_Signature[] = "#?RADIANCE";
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// This is the official header signature for the .HDR (RGBE) file format.
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const char g_AltSignature[] = "#?RGBE";
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// This is a common variant header signature that is otherwise exactly the same format.
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const char g_Format[] = "FORMAT=";
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const char g_Exposure[] = "EXPOSURE=";
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const char g_sRGBE[] = "32-bit_rle_rgbe";
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const char g_sXYZE[] = "32-bit_rle_xyze";
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const char g_Header[] =
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"#?RADIANCE\n"\
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"FORMAT=32-bit_rle_rgbe\n"\
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"\n"\
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"-Y %u +X %u\n";
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inline size_t FindEOL(const char* str, size_t maxlen)
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{
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size_t pos = 0;
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while (pos < maxlen)
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{
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if (str[pos] == '\n')
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return pos;
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else if (str[pos] == '\0')
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return size_t(-1);
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++pos;
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}
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return 0;
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}
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//-------------------------------------------------------------------------------------
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// Decodes HDR header
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//-------------------------------------------------------------------------------------
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HRESULT DecodeHDRHeader(
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_In_reads_bytes_(size) const void* pSource,
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size_t size,
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_Out_ TexMetadata& metadata,
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size_t& offset,
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float& exposure)
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{
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if (!pSource)
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return E_INVALIDARG;
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memset(&metadata, 0, sizeof(TexMetadata));
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exposure = 1.f;
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if (size < sizeof(g_Signature))
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{
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return HRESULT_FROM_WIN32(ERROR_INVALID_DATA);
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}
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// Verify magic signature
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if (memcmp(pSource, g_Signature, sizeof(g_Signature) - 1) != 0
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&& memcmp(pSource, g_AltSignature, sizeof(g_AltSignature) - 1) != 0)
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{
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return E_FAIL;
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}
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// Process first part of header
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bool formatFound = false;
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auto info = static_cast<const char*>(pSource);
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while (size > 0)
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{
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if (*info == '\n')
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{
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++info;
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--size;
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break;
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}
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const size_t formatLen = sizeof(g_Format) - 1;
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const size_t exposureLen = sizeof(g_Exposure) - 1;
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if ((size > formatLen) && memcmp(info, g_Format, formatLen) == 0)
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{
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info += formatLen;
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size -= formatLen;
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// Trim whitespace
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while (*info == ' ' || *info == '\t')
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{
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if (--size == 0)
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return E_FAIL;
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++info;
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}
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static_assert(sizeof(g_sRGBE) == sizeof(g_sXYZE), "Format strings length mismatch");
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const size_t encodingLen = sizeof(g_sRGBE) - 1;
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if (size < encodingLen)
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{
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return E_FAIL;
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}
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if (memcmp(info, g_sRGBE, encodingLen) != 0 && memcmp(info, g_sXYZE, encodingLen) != 0)
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{
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return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
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}
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formatFound = true;
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size_t len = FindEOL(info, size);
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if (len == size_t(-1))
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{
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return E_FAIL;
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}
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info += len + 1;
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size -= len + 1;
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}
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else if ((size > exposureLen) && memcmp(info, g_Exposure, exposureLen) == 0)
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{
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info += exposureLen;
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size -= exposureLen;
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// Trim whitespace
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while (*info == ' ' || *info == '\t')
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{
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if (--size == 0)
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return E_FAIL;
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++info;
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}
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size_t len = FindEOL(info, size);
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if (len == size_t(-1)
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|| len < 1)
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{
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return E_FAIL;
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}
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char buff[32] = {};
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strncpy_s(buff, info, std::min<size_t>(31, len));
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auto newExposure = static_cast<float>(atof(buff));
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if ((newExposure >= 1e-12) && (newExposure <= 1e12))
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{
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// Note that we ignore strange exposure values (like EXPOSURE=0)
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exposure *= newExposure;
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}
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info += len + 1;
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size -= len + 1;
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}
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else
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{
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size_t len = FindEOL(info, size);
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if (len == size_t(-1))
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{
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return E_FAIL;
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}
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info += len + 1;
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size -= len + 1;
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}
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}
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if (!formatFound)
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{
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return E_FAIL;
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}
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// Get orientation
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char orientation[256] = {};
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size_t len = FindEOL(info, std::min<size_t>(sizeof(orientation), size - 1));
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if (len == size_t(-1)
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|| len <= 2)
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{
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return E_FAIL;
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}
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strncpy_s(orientation, info, len);
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if (orientation[0] != '-' && orientation[1] != 'Y')
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{
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// We only support the -Y +X orientation (see top of file)
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return HRESULT_FROM_WIN32(
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((orientation[0] == '+' || orientation[0] == '-') && (orientation[1] == 'X' || orientation[1] == 'Y'))
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? ERROR_NOT_SUPPORTED : ERROR_INVALID_DATA
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);
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}
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uint32_t height = 0;
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if (sscanf_s(orientation + 2, "%u", &height) != 1)
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{
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return E_FAIL;
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}
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const char* ptr = orientation + 2;
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while (*ptr != 0 && *ptr != '-' && *ptr != '+')
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++ptr;
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if (*ptr == 0)
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{
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return E_FAIL;
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}
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else if (*ptr != '+')
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{
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// We only support the -Y +X orientation (see top of file)
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return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
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}
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++ptr;
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if (*ptr == 0 || (*ptr != 'X' && *ptr != 'Y'))
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{
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return E_FAIL;
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}
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else if (*ptr != 'X')
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{
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// We only support the -Y +X orientation (see top of file)
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return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
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}
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++ptr;
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uint32_t width;
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if (sscanf_s(ptr, "%u", &width) != 1)
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{
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return E_FAIL;
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}
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info += len + 1;
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size -= len + 1;
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if (!width || !height)
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{
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return HRESULT_FROM_WIN32(ERROR_INVALID_DATA);
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}
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if (size == 0)
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{
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return E_FAIL;
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}
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offset = info - static_cast<const char*>(pSource);
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metadata.width = width;
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metadata.height = height;
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metadata.depth = metadata.arraySize = metadata.mipLevels = 1;
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metadata.format = DXGI_FORMAT_R32G32B32A32_FLOAT;
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metadata.dimension = TEX_DIMENSION_TEXTURE2D;
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return S_OK;
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}
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//-------------------------------------------------------------------------------------
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// FloatToRGBE
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//-------------------------------------------------------------------------------------
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inline void FloatToRGBE(_Out_writes_(width*4) uint8_t* pDestination, _In_reads_(width*fpp) const float* pSource, size_t width, _In_range_(3, 4) int fpp)
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{
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auto ePtr = pSource + width * fpp;
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for (size_t j = 0; j < width; ++j)
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{
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if (pSource + 2 >= ePtr) break;
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float r = pSource[0] >= 0.f ? pSource[0] : 0.f;
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float g = pSource[1] >= 0.f ? pSource[1] : 0.f;
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float b = pSource[2] >= 0.f ? pSource[2] : 0.f;
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pSource += fpp;
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const float max_xy = (r > g) ? r : g;
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float max_xyz = (max_xy > b) ? max_xy : b;
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if (max_xyz > 1e-32)
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{
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int e;
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max_xyz = frexpf(max_xyz, &e) * 256.f / max_xyz;
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e += 128;
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uint8_t red = uint8_t(r * max_xyz);
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uint8_t green = uint8_t(g * max_xyz);
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uint8_t blue = uint8_t(b * max_xyz);
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pDestination[0] = red;
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pDestination[1] = green;
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pDestination[2] = blue;
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pDestination[3] = (red || green || blue) ? uint8_t(e & 0xff) : 0;
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}
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else
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{
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pDestination[0] = pDestination[1] = pDestination[2] = pDestination[3] = 0;
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}
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pDestination += 4;
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}
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}
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//-------------------------------------------------------------------------------------
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// Encode using Adapative RLE
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//-------------------------------------------------------------------------------------
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_Success_(return > 0)
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size_t EncodeRLE(_Out_writes_(width * 4) uint8_t* enc, _In_reads_(width * 4) const uint8_t* rgbe, size_t rowPitch, size_t width)
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{
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if (width < 8 || width > 32767)
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{
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// Don't try to compress too narrow or too wide scan-lines
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return 0;
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}
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#ifdef WRITE_OLD_COLORS
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size_t encSize = 0;
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const uint8_t* scanPtr = rgbe;
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for (size_t pixelCount = 0; pixelCount < width;)
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{
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size_t spanLen = 1;
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auto spanPtr = reinterpret_cast<const uint32_t*>(scanPtr);
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while (pixelCount + spanLen < width && spanLen < 32767)
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{
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if (spanPtr[spanLen] == *spanPtr)
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{
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++spanLen;
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}
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else
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break;
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}
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if (spanLen > 2)
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{
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if (scanPtr[0] == 1 && scanPtr[1] == 1 && scanPtr[2] == 1)
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{
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return 0;
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}
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if (encSize + 8 > rowPitch)
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return 0;
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auto rleLen = static_cast<uint8_t>(std::min<size_t>(spanLen - 1, 255));
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enc[0] = scanPtr[0];
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enc[1] = scanPtr[1];
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enc[2] = scanPtr[2];
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enc[3] = scanPtr[3];
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enc[4] = 1;
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enc[5] = 1;
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enc[6] = 1;
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enc[7] = rleLen;
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enc += 8;
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encSize += 8;
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size_t remaining = spanLen - 1 - rleLen;
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if (remaining > 0)
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{
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rleLen = static_cast<uint8_t>(remaining >> 8);
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if (rleLen > 0)
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{
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if (encSize + 4 > rowPitch)
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return 0;
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enc[0] = 1;
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enc[1] = 1;
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enc[2] = 1;
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enc[3] = rleLen;
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enc += 4;
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encSize += 4;
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remaining -= (rleLen << 8);
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}
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while (remaining > 0)
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{
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if (encSize + 4 > rowPitch)
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return 0;
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enc[0] = scanPtr[0];
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enc[1] = scanPtr[1];
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enc[2] = scanPtr[2];
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enc[3] = scanPtr[3];
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enc += 4;
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encSize += 4;
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--remaining;
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}
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}
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scanPtr += spanLen * 4;
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pixelCount += spanLen;
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}
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else if (scanPtr[0] == 1 && scanPtr[1] == 1 && scanPtr[2] == 1)
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{
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return 0;
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}
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else
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{
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if (encSize + 4 > rowPitch)
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return 0;
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enc[0] = scanPtr[0];
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enc[1] = scanPtr[1];
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enc[2] = scanPtr[2];
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enc[3] = scanPtr[3];
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enc += 4;
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encSize += 4;
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++pixelCount;
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scanPtr += 4;
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}
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}
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return encSize;
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#else
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enc[0] = 2;
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enc[1] = 2;
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enc[2] = uint8_t(width >> 8);
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enc[3] = uint8_t(width & 0xff);
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enc += 4;
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size_t encSize = 4;
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uint8_t scan[128] = {};
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for (int channel = 0; channel < 4; ++channel)
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{
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const uint8_t* spanPtr = rgbe + channel;
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for (size_t pixelCount = 0; pixelCount < width;)
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{
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uint8_t spanLen = 1;
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while (pixelCount + spanLen < width && spanLen < 127)
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{
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if (spanPtr[spanLen * 4] == *spanPtr)
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{
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++spanLen;
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}
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else
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break;
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}
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if (spanLen > 1)
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{
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if (encSize + 2 > rowPitch)
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return 0;
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enc[0] = 128 + spanLen;
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enc[1] = *spanPtr;
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enc += 2;
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encSize += 2;
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spanPtr += size_t(spanLen) * 4;
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pixelCount += spanLen;
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}
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else
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{
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uint8_t runLen = 1;
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scan[0] = *spanPtr;
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while (pixelCount + runLen < width && runLen < 127)
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{
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if (spanPtr[(runLen - 1) * 4] != spanPtr[runLen * 4])
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{
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scan[runLen] = spanPtr[runLen * 4];
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runLen++;
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}
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else
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break;
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}
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if (encSize + runLen + 1 > rowPitch)
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return 0;
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*enc++ = runLen;
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memcpy(enc, scan, runLen);
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enc += runLen;
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encSize += size_t(runLen) + 1;
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spanPtr += size_t(runLen) * 4;
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pixelCount += runLen;
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}
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}
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}
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return encSize;
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#endif
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}
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}
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//=====================================================================================
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// Entry-points
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//=====================================================================================
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//-------------------------------------------------------------------------------------
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// Obtain metadata from HDR file in memory/on disk
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//-------------------------------------------------------------------------------------
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_Use_decl_annotations_
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HRESULT DirectX::GetMetadataFromHDRMemory(const void* pSource, size_t size, TexMetadata& metadata)
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{
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if (!pSource || size == 0)
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return E_INVALIDARG;
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size_t offset;
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float exposure;
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return DecodeHDRHeader(pSource, size, metadata, offset, exposure);
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}
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_Use_decl_annotations_
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HRESULT DirectX::GetMetadataFromHDRFile(const wchar_t* szFile, TexMetadata& metadata)
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{
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if (!szFile)
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return E_INVALIDARG;
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#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
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ScopedHandle hFile(safe_handle(CreateFile2(szFile, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, nullptr)));
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#else
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ScopedHandle hFile(safe_handle(CreateFileW(szFile, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING,
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FILE_FLAG_SEQUENTIAL_SCAN, nullptr)));
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#endif
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if (!hFile)
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{
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return HRESULT_FROM_WIN32(GetLastError());
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}
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|
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// Get the file size
|
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FILE_STANDARD_INFO fileInfo;
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if (!GetFileInformationByHandleEx(hFile.get(), FileStandardInfo, &fileInfo, sizeof(fileInfo)))
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{
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return HRESULT_FROM_WIN32(GetLastError());
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}
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|
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// File is too big for 32-bit allocation, so reject read (4 GB should be plenty large enough for a valid HDR file)
|
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if (fileInfo.EndOfFile.HighPart > 0)
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{
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return HRESULT_FROM_WIN32(ERROR_FILE_TOO_LARGE);
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}
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|
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// Need at least enough data to fill the standard header to be a valid HDR
|
|
if (fileInfo.EndOfFile.LowPart < sizeof(g_Signature))
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{
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return E_FAIL;
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}
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|
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// Read the first part of the file to find the header
|
|
uint8_t header[8192] = {};
|
|
DWORD bytesRead = 0;
|
|
if (!ReadFile(hFile.get(), header, std::min<DWORD>(sizeof(header), fileInfo.EndOfFile.LowPart), &bytesRead, nullptr))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
size_t offset;
|
|
float exposure;
|
|
return DecodeHDRHeader(header, bytesRead, metadata, offset, exposure);
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Load a HDR file in memory
|
|
//-------------------------------------------------------------------------------------
|
|
_Use_decl_annotations_
|
|
HRESULT DirectX::LoadFromHDRMemory(const void* pSource, size_t size, TexMetadata* metadata, ScratchImage& image)
|
|
{
|
|
if (!pSource || size == 0)
|
|
return E_INVALIDARG;
|
|
|
|
image.Release();
|
|
|
|
size_t offset;
|
|
float exposure;
|
|
TexMetadata mdata;
|
|
HRESULT hr = DecodeHDRHeader(pSource, size, mdata, offset, exposure);
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
if (offset > size)
|
|
return E_FAIL;
|
|
|
|
size_t remaining = size - offset;
|
|
if (remaining == 0)
|
|
return E_FAIL;
|
|
|
|
hr = image.Initialize2D(mdata.format, mdata.width, mdata.height, 1, 1);
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
// Copy pixels
|
|
auto sourcePtr = static_cast<const uint8_t*>(pSource) + offset;
|
|
|
|
size_t pixelLen = remaining;
|
|
|
|
const Image* img = image.GetImage(0, 0, 0);
|
|
if (!img)
|
|
{
|
|
image.Release();
|
|
return E_POINTER;
|
|
}
|
|
|
|
auto destPtr = img->pixels;
|
|
|
|
#ifdef _DEBUG
|
|
memset(img->pixels, 0xFF, img->rowPitch * img->height);
|
|
#endif
|
|
|
|
for (size_t scan = 0; scan < mdata.height; ++scan)
|
|
{
|
|
if (pixelLen < 4)
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
|
|
uint8_t inColor[4];
|
|
memcpy(inColor, sourcePtr, 4);
|
|
sourcePtr += 4;
|
|
pixelLen -= 4;
|
|
|
|
auto scanLine = reinterpret_cast<float*>(destPtr);
|
|
|
|
if (inColor[0] == 2 && inColor[1] == 2 && inColor[2] < 128)
|
|
{
|
|
// Adaptive Run Length Encoding (RLE)
|
|
if (size_t((size_t(inColor[2]) << 8) + inColor[3]) != mdata.width)
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
|
|
for (int channel = 0; channel < 4; ++channel)
|
|
{
|
|
auto pixelLoc = scanLine + channel;
|
|
for(size_t pixelCount = 0; pixelCount < mdata.width;)
|
|
{
|
|
if (pixelLen < 2)
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
|
|
assert(sourcePtr < (reinterpret_cast<const uint8_t*>(pSource) + size));
|
|
|
|
uint8_t runLen = *sourcePtr;
|
|
if (runLen > 128)
|
|
{
|
|
runLen &= 127;
|
|
if (pixelCount + runLen > mdata.width)
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
|
|
auto val = static_cast<float>(sourcePtr[1]);
|
|
for (uint8_t j = 0; j < runLen; ++j)
|
|
{
|
|
*pixelLoc = val;
|
|
pixelLoc += 4;
|
|
}
|
|
pixelCount += runLen;
|
|
sourcePtr += 2;
|
|
pixelLen -= 2;
|
|
}
|
|
else if ((size < size_t(runLen) + 1) || ((pixelCount + size_t(runLen)) > mdata.width))
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
else
|
|
{
|
|
++sourcePtr;
|
|
for (uint8_t j = 0; j < runLen; ++j)
|
|
{
|
|
auto val = static_cast<float>(*sourcePtr++);
|
|
*pixelLoc = val;
|
|
pixelLoc += 4;
|
|
}
|
|
pixelCount += runLen;
|
|
pixelLen -= size_t(runLen) + 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
auto pixelLoc = scanLine;
|
|
|
|
float prevColor[4];
|
|
prevColor[0] = inColor[0];
|
|
prevColor[1] = inColor[1];
|
|
prevColor[2] = inColor[2];
|
|
prevColor[3] = inColor[3];
|
|
|
|
int bitShift = 0;
|
|
for (size_t pixelCount = 0; pixelCount < mdata.width;)
|
|
{
|
|
if (inColor[0] == 1 && inColor[1] == 1 && inColor[2] == 1)
|
|
{
|
|
if (bitShift > 24)
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
|
|
// "Standard" Run Length Encoding
|
|
size_t spanLen = size_t(inColor[3]) << bitShift;
|
|
if (spanLen + pixelCount > mdata.width)
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
|
|
for (size_t j = 0; j < spanLen; ++j)
|
|
{
|
|
pixelLoc[0] = prevColor[0];
|
|
pixelLoc[1] = prevColor[1];
|
|
pixelLoc[2] = prevColor[2];
|
|
pixelLoc[3] = prevColor[3];
|
|
pixelLoc += 4;
|
|
}
|
|
pixelCount += spanLen;
|
|
bitShift += 8;
|
|
}
|
|
else
|
|
{
|
|
// Uncompressed
|
|
pixelLoc[0] = prevColor[0] = inColor[0];
|
|
pixelLoc[1] = prevColor[1] = inColor[1];
|
|
pixelLoc[2] = prevColor[2] = inColor[2];
|
|
pixelLoc[3] = prevColor[3] = inColor[3];
|
|
bitShift = 0;
|
|
++pixelCount;
|
|
pixelLoc += 4;
|
|
}
|
|
|
|
if (pixelCount >= mdata.width)
|
|
break;
|
|
|
|
if (pixelLen < 4)
|
|
{
|
|
image.Release();
|
|
return E_FAIL;
|
|
}
|
|
|
|
memcpy(inColor, sourcePtr, 4);
|
|
sourcePtr += 4;
|
|
pixelLen -= 4;
|
|
}
|
|
}
|
|
|
|
destPtr += img->rowPitch;
|
|
}
|
|
|
|
// Transform values
|
|
{
|
|
auto fdata = reinterpret_cast<float*>(image.GetPixels());
|
|
|
|
for (size_t j = 0; j < image.GetPixelsSize(); j += 16)
|
|
{
|
|
auto exponent = static_cast<int>(fdata[3]);
|
|
fdata[0] = 1.0f / exposure*ldexpf((fdata[0] + 0.5f), exponent - (128 + 8));
|
|
fdata[1] = 1.0f / exposure*ldexpf((fdata[1] + 0.5f), exponent - (128 + 8));
|
|
fdata[2] = 1.0f / exposure*ldexpf((fdata[2] + 0.5f), exponent - (128 + 8));
|
|
fdata[3] = 1.f;
|
|
|
|
fdata += 4;
|
|
}
|
|
}
|
|
|
|
if (metadata)
|
|
memcpy(metadata, &mdata, sizeof(TexMetadata));
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Load a HDR file from disk
|
|
//-------------------------------------------------------------------------------------
|
|
_Use_decl_annotations_
|
|
HRESULT DirectX::LoadFromHDRFile(const wchar_t* szFile, TexMetadata* metadata, ScratchImage& image)
|
|
{
|
|
if (!szFile)
|
|
return E_INVALIDARG;
|
|
|
|
image.Release();
|
|
|
|
#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
|
|
ScopedHandle hFile(safe_handle(CreateFile2(szFile, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, nullptr)));
|
|
#else
|
|
ScopedHandle hFile(safe_handle(CreateFileW(szFile, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING,
|
|
FILE_FLAG_SEQUENTIAL_SCAN, nullptr)));
|
|
#endif
|
|
if (!hFile)
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
// Get the file size
|
|
FILE_STANDARD_INFO fileInfo;
|
|
if (!GetFileInformationByHandleEx(hFile.get(), FileStandardInfo, &fileInfo, sizeof(fileInfo)))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
// File is too big for 32-bit allocation, so reject read (4 GB should be plenty large enough for a valid HDR file)
|
|
if (fileInfo.EndOfFile.HighPart > 0)
|
|
{
|
|
return HRESULT_FROM_WIN32(ERROR_FILE_TOO_LARGE);
|
|
}
|
|
|
|
// Need at least enough data to fill the header to be a valid HDR
|
|
if (fileInfo.EndOfFile.LowPart < sizeof(g_Signature))
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
|
|
// Read file
|
|
std::unique_ptr<uint8_t[]> temp(new (std::nothrow) uint8_t[fileInfo.EndOfFile.LowPart]);
|
|
if (!temp)
|
|
{
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
DWORD bytesRead = 0;
|
|
if (!ReadFile(hFile.get(), temp.get(), fileInfo.EndOfFile.LowPart, &bytesRead, nullptr))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
if (bytesRead != fileInfo.EndOfFile.LowPart)
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
|
|
return LoadFromHDRMemory(temp.get(), fileInfo.EndOfFile.LowPart, metadata, image);
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Save a HDR file to memory
|
|
//-------------------------------------------------------------------------------------
|
|
_Use_decl_annotations_
|
|
HRESULT DirectX::SaveToHDRMemory(const Image& image, Blob& blob)
|
|
{
|
|
if (!image.pixels)
|
|
return E_POINTER;
|
|
|
|
if (image.width > 32767 || image.height > 32767)
|
|
{
|
|
// Images larger than this can't be RLE encoded. They are technically allowed as
|
|
// uncompresssed, but we just don't support them.
|
|
return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
|
|
}
|
|
|
|
int fpp;
|
|
switch (image.format)
|
|
{
|
|
case DXGI_FORMAT_R32G32B32A32_FLOAT:
|
|
fpp = 4;
|
|
break;
|
|
|
|
case DXGI_FORMAT_R32G32B32_FLOAT:
|
|
fpp = 3;
|
|
break;
|
|
|
|
default:
|
|
return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
|
|
}
|
|
|
|
blob.Release();
|
|
|
|
char header[256] = {};
|
|
sprintf_s(header, g_Header, image.height, image.width);
|
|
|
|
auto headerLen = static_cast<DWORD>(strlen(header));
|
|
|
|
size_t rowPitch = image.width * 4;
|
|
size_t slicePitch = image.height * rowPitch;
|
|
|
|
HRESULT hr = blob.Initialize(headerLen + slicePitch);
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
// Copy header
|
|
auto dPtr = static_cast<uint8_t*>(blob.GetBufferPointer());
|
|
assert(dPtr != nullptr);
|
|
memcpy_s(dPtr, blob.GetBufferSize(), header, headerLen);
|
|
dPtr += headerLen;
|
|
|
|
#ifdef DISABLE_COMPRESS
|
|
// Uncompressed write
|
|
auto sPtr = reinterpret_cast<const uint8_t*>(image.pixels);
|
|
for (size_t scan = 0; scan < image.height; ++scan)
|
|
{
|
|
FloatToRGBE(dPtr, reinterpret_cast<const float*>(sPtr), image.width, fpp);
|
|
dPtr += rowPitch;
|
|
sPtr += image.rowPitch;
|
|
}
|
|
#else
|
|
std::unique_ptr<uint8_t[]> temp(new (std::nothrow) uint8_t[rowPitch * 2]);
|
|
if (!temp)
|
|
{
|
|
blob.Release();
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
auto rgbe = temp.get();
|
|
auto enc = temp.get() + rowPitch;
|
|
|
|
const uint8_t* sPtr = image.pixels;
|
|
for (size_t scan = 0; scan < image.height; ++scan)
|
|
{
|
|
FloatToRGBE(rgbe, reinterpret_cast<const float*>(sPtr), image.width, fpp);
|
|
sPtr += image.rowPitch;
|
|
|
|
size_t encSize = EncodeRLE(enc, rgbe, rowPitch, image.width);
|
|
if (encSize > 0)
|
|
{
|
|
memcpy(dPtr, enc, encSize);
|
|
dPtr += encSize;
|
|
}
|
|
else
|
|
{
|
|
memcpy(dPtr, rgbe, rowPitch);
|
|
dPtr += rowPitch;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
hr = blob.Trim(dPtr - static_cast<uint8_t*>(blob.GetBufferPointer()));
|
|
if (FAILED(hr))
|
|
{
|
|
blob.Release();
|
|
return hr;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Save a HDR file to disk
|
|
//-------------------------------------------------------------------------------------
|
|
_Use_decl_annotations_
|
|
HRESULT DirectX::SaveToHDRFile(const Image& image, const wchar_t* szFile)
|
|
{
|
|
if (!szFile)
|
|
return E_INVALIDARG;
|
|
|
|
if (!image.pixels)
|
|
return E_POINTER;
|
|
|
|
if (image.width > 32767 || image.height > 32767)
|
|
{
|
|
// Images larger than this can't be RLE encoded. They are technically allowed as
|
|
// uncompresssed, but we just don't support them.
|
|
return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
|
|
}
|
|
|
|
int fpp;
|
|
switch (image.format)
|
|
{
|
|
case DXGI_FORMAT_R32G32B32A32_FLOAT:
|
|
fpp = 4;
|
|
break;
|
|
|
|
case DXGI_FORMAT_R32G32B32_FLOAT:
|
|
fpp = 3;
|
|
break;
|
|
|
|
default:
|
|
return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
|
|
}
|
|
|
|
// Create file and write header
|
|
#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
|
|
ScopedHandle hFile(safe_handle(CreateFile2(szFile, GENERIC_WRITE, 0, CREATE_ALWAYS, nullptr)));
|
|
#else
|
|
ScopedHandle hFile(safe_handle(CreateFileW(szFile, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, 0, nullptr)));
|
|
#endif
|
|
if (!hFile)
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
auto_delete_file delonfail(hFile.get());
|
|
|
|
size_t rowPitch = image.width * 4;
|
|
size_t slicePitch = image.height * rowPitch;
|
|
|
|
if (slicePitch < 65535)
|
|
{
|
|
// For small images, it is better to create an in-memory file and write it out
|
|
Blob blob;
|
|
|
|
HRESULT hr = SaveToHDRMemory(image, blob);
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
// Write blob
|
|
auto bytesToWrite = static_cast<const DWORD>(blob.GetBufferSize());
|
|
DWORD bytesWritten;
|
|
if (!WriteFile(hFile.get(), blob.GetBufferPointer(), bytesToWrite, &bytesWritten, nullptr))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
if (bytesWritten != bytesToWrite)
|
|
{
|
|
return E_FAIL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Otherwise, write the image one scanline at a time...
|
|
std::unique_ptr<uint8_t[]> temp(new (std::nothrow) uint8_t[rowPitch * 2]);
|
|
if (!temp)
|
|
return E_OUTOFMEMORY;
|
|
|
|
auto rgbe = temp.get();
|
|
|
|
// Write header
|
|
char header[256] = {};
|
|
sprintf_s(header, g_Header, image.height, image.width);
|
|
|
|
auto headerLen = static_cast<DWORD>(strlen(header));
|
|
|
|
DWORD bytesWritten;
|
|
if (!WriteFile(hFile.get(), header, headerLen, &bytesWritten, nullptr))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
if (bytesWritten != headerLen)
|
|
return E_FAIL;
|
|
|
|
#ifdef DISABLE_COMPRESS
|
|
// Uncompressed write
|
|
auto sPtr = reinterpret_cast<const uint8_t*>(image.pixels);
|
|
for (size_t scan = 0; scan < image.height; ++scan)
|
|
{
|
|
FloatToRGBE(rgbe, reinterpret_cast<const float*>(sPtr), image.width, fpp);
|
|
sPtr += image.rowPitch;
|
|
|
|
if (!WriteFile(hFile.get(), rgbe, static_cast<DWORD>(rowPitch), &bytesWritten, nullptr))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
if (bytesWritten != rowPitch)
|
|
return E_FAIL;
|
|
}
|
|
#else
|
|
auto enc = temp.get() + rowPitch;
|
|
|
|
const uint8_t* sPtr = image.pixels;
|
|
for (size_t scan = 0; scan < image.height; ++scan)
|
|
{
|
|
FloatToRGBE(rgbe, reinterpret_cast<const float*>(sPtr), image.width, fpp);
|
|
sPtr += image.rowPitch;
|
|
|
|
size_t encSize = EncodeRLE(enc, rgbe, rowPitch, image.width);
|
|
if (encSize > 0)
|
|
{
|
|
if (!WriteFile(hFile.get(), enc, static_cast<DWORD>(encSize), &bytesWritten, nullptr))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
if (bytesWritten != encSize)
|
|
return E_FAIL;
|
|
}
|
|
else
|
|
{
|
|
if (!WriteFile(hFile.get(), rgbe, static_cast<DWORD>(rowPitch), &bytesWritten, nullptr))
|
|
{
|
|
return HRESULT_FROM_WIN32(GetLastError());
|
|
}
|
|
|
|
if (bytesWritten != rowPitch)
|
|
return E_FAIL;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
delonfail.clear();
|
|
|
|
return S_OK;
|
|
}
|