imageio.cpp File Reference

#include "stdafx.h"
#include "imageio.h"
#include "pbrt.h"
#include "spectrum.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

Go to the source code of this file.

Classes
struct	tga_header_t
struct	tga_colormapspec_t
struct	tga_imagespec_t
Defines
#define	SHORT(x) (x)
#define	TO_BYTE(v) (uint8_t(Clamp(255.f * powf((v), 1.f/2.3f), 0.f, 255.f)))
#define	BUFFER_SIZE 80
Typedefs
typedef uint8_t	byte
typedef unsigned char	uchar
Functions
static RGBSpectrum *	ReadImageEXR (const string &name, int width, int height)
static void	WriteImageEXR (const string &name, float pixels, float alpha, int xRes, int yRes, int totalXRes, int totalYRes, int xOffset, int yOffset)
static void	WriteImageTGA (const string &name, float pixels, float alpha, int xRes, int yRes, int totalXRes, int totalYRes, int xOffset, int yOffset)
static RGBSpectrum *	ReadImageTGA (const string &name, int w, int h)
static bool	WriteImagePFM (const string &filename, const float *rgb, int xres, int yres)
static RGBSpectrum *	ReadImagePFM (const string &filename, int xres, int yres)
RGBSpectrum *	ReadImage (const string &name, int width, int height)
void	WriteImage (const string &name, float pixels, float alpha, int xRes, int yRes, int totalXRes, int totalYRes, int xOffset, int yOffset)
static bool	writeByte (FILE *f, uchar b)
static bool	writeShort (FILE *f, int16_t s)
static uchar	readByte (FILE *f)
static int16_t	readShort (FILE *f)
static void	writeHeader (uchar idLength, uchar colorMapType, uchar imageType, FILE *file)
static void	readHeader (tga_header_t dst, FILE file)
static void	writeColorMapSpec (int16_t index, int16_t length, uchar entrySize, FILE *file)
static void	readColorMapSpec (tga_colormapspec_t dst, FILE file)
static void	writeImageSpec (int16_t xOrigin, int16_t yOrigin, int16_t width, int16_t height, uchar pixDepth, FILE *file)
static void	readImageSpec (tga_imagespec_t dst, FILE file)
static int	isWhitespace (char c)
static int	readWord (FILE fp, char buffer, int bufferLength)
Variables
static bool	hostLittleEndian

Detailed Description

License

License: GPL Online License Link: http://www.gnu.org/licenses/gpl.html

Author:: Copyright (c) 2003-2009 Jaakko Keranen <jaakko.keranen@iki.fi>; Copyright (c) 2009 Daniel Swanson <danij@dengine.net>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Definition in file imageio.cpp.

Define Documentation

#define BUFFER_SIZE 80

Definition at line 561 of file imageio.cpp.

Referenced by ReadImagePFM().

#define SHORT ( x ) (x)

Definition at line 224 of file imageio.cpp.

Referenced by writeShort().

#define TO_BYTE ( v ) (uint8_t(Clamp(255.f * powf((v), 1.f/2.3f), 0.f, 255.f)))

Referenced by WriteImageTGA().

Typedef Documentation

typedef uint8_t byte

gl_tga.c: TGA file format (TARGA) reader/writer.

Definition at line 213 of file imageio.cpp.

typedef unsigned char uchar

Definition at line 216 of file imageio.cpp.

Function Documentation

static int isWhitespace ( char c ) [inline, static]

Definition at line 563 of file imageio.cpp.

Referenced by readWord().

static uchar readByte ( FILE * f ) [static]

Definition at line 277 of file imageio.cpp.

Referenced by readColorMapSpec(), readHeader(), and readImageSpec().

static void readColorMapSpec	(	tga_colormapspec_t *	dst,
		FILE *	file
	)			`[static]`

Definition at line 346 of file imageio.cpp.

References tga_colormapspec_t::entrySize, tga_colormapspec_t::index, tga_colormapspec_t::length, readByte(), and readShort().

Referenced by ReadImageTGA().

static void readHeader	(	tga_header_t *	dst,
		FILE *	file
	)			`[static]`

Definition at line 321 of file imageio.cpp.

References tga_header_t::colorMapType, tga_header_t::idLength, tga_header_t::imageType, and readByte().

Referenced by ReadImageTGA().

RGBSpectrum* ReadImage	(	const string &	name,
		int *	width,
		int *	height
	)

Definition at line 45 of file imageio.cpp.

References Error(), ReadImageEXR(), ReadImagePFM(), and ReadImageTGA().

Referenced by ImageTexture< Tmemory, Treturn >::GetTexture(), GonioPhotometricLight::GonioPhotometricLight(), InfiniteAreaLight::InfiniteAreaLight(), and ProjectionLight::ProjectionLight().

static RGBSpectrum* ReadImageEXR	(	const string &	name,
		int *	width,
		int *	height
	)			`[static]`

Referenced by ReadImage().

static RGBSpectrum * ReadImagePFM	(	const string &	filename,
		int *	xres,
		int *	yres
	)			`[static]`

Definition at line 601 of file imageio.cpp.

References BUFFER_SIZE, Error(), RGBSpectrum::FromRGB(), and readWord().

Referenced by ReadImage().

static void readImageSpec	(	tga_imagespec_t *	dst,
		FILE *	file
	)			`[static]`

Definition at line 384 of file imageio.cpp.

References tga_imagespec_t::attributeBits, tga_imagespec_t::height, tga_imagespec_t::pixelDepth, readByte(), readShort(), tga_imagespec_t::width, tga_imagespec_t::xOrigin, and tga_imagespec_t::yOrigin.

Referenced by ReadImageTGA().

static RGBSpectrum * ReadImageTGA	(	const string &	name,
		int *	width,
		int *	height
	)			`[static]`

Loads a TGA image (not the RLE types though)

Definition at line 447 of file imageio.cpp.

References Assert, tga_imagespec_t::attributeBits, Error(), RGBSpectrum::FromRGB(), tga_imagespec_t::height, tga_header_t::imageType, Info(), tga_imagespec_t::pixelDepth, readColorMapSpec(), readHeader(), readImageSpec(), and tga_imagespec_t::width.

Referenced by ReadImage().

static int16_t readShort ( FILE * f ) [static]

Definition at line 286 of file imageio.cpp.

Referenced by readColorMapSpec(), and readImageSpec().

static int readWord	(	FILE *	fp,
		char *	buffer,
		int	bufferLength
	)			`[static]`

Definition at line 576 of file imageio.cpp.

References isWhitespace().

Referenced by ReadImagePFM().

static bool writeByte	(	FILE *	f,
		uchar	b
	)			`[static]`

Definition at line 262 of file imageio.cpp.

Referenced by writeColorMapSpec(), writeHeader(), and writeImageSpec().

static void writeColorMapSpec	(	int16_t	index,
		int16_t	length,
		uchar	entrySize,
		FILE *	file
	)			`[static]`

Parameters:

	index	Index of first color map entry.
	length	Total number of color map entries.
	entrySize	Number of bits in a color map entry; 15/16/24/32.
	file	Handle to the file to be written to.

Definition at line 336 of file imageio.cpp.

References writeByte(), and writeShort().

Referenced by WriteImageTGA().

static void writeHeader	(	uchar	idLength,
		uchar	colorMapType,
		uchar	imageType,
		FILE *	file
	)			`[static]`

Parameters:

	idLength	Identification field size in bytes (max 255). `0` indicates no identification field.
	colorMapType	Type of the color map, `0` or `1`: `0` = color map data is not present. `1` = color map data IS present.
	imageType	Image data type code, one of: `0` = no image data is present. `1` = uncompressed, color mapped image. `2` = uncompressed, true-color image. `3` = uncompressed, grayscale image. `9` = run-length encoded, color mapped image. `10` = run-length encoded, true-color image. `11` = run-length encoded, grayscale image.
	file	Handle to the file to be written to.

Definition at line 311 of file imageio.cpp.

References writeByte().

Referenced by WriteImageTGA().

void WriteImage	(	const string &	name,
		float *	pixels,
		float *	alpha,
		int	xRes,
		int	yRes,
		int	totalXRes,
		int	totalYRes,
		int	xOffset,
		int	yOffset
	)

Definition at line 69 of file imageio.cpp.

References Error(), WriteImageEXR(), WriteImagePFM(), and WriteImageTGA().

Referenced by SHWriteImage().

static void WriteImageEXR	(	const string &	name,
		float *	pixels,
		float *	alpha,
		int	xRes,
		int	yRes,
		int	totalXRes,
		int	totalYRes,
		int	xOffset,
		int	yOffset
	)			`[static]`

Referenced by WriteImage().

static bool WriteImagePFM	(	const string &	filename,
		const float *	rgb,
		int	xres,
		int	yres
	)			`[static]`

Definition at line 690 of file imageio.cpp.

References Error().

Referenced by WriteImage().

static void writeImageSpec	(	int16_t	xOrigin,
		int16_t	yOrigin,
		int16_t	width,
		int16_t	height,
		uchar	pixDepth,
		FILE *	file
	)			`[static]`

Parameters:

	xOrigin	X coordinate of lower left corner.
	yOrigin	Y coordinate of lower left corner.
	width	Width of the image in pixels.
	height	Height of the image in pixels.
	pixDepth	Number of bits per pixel, one of; 16/24/32.
	file	Handle to the file to be written to.

attributeBits:4; // Attribute bits associated with each pixel. reserved:1; // A reserved bit; must be 0. screenOrigin:1; // Location of screen origin; must be 0. dataInterleave:2; // TGA_INTERLEAVE_*

Definition at line 363 of file imageio.cpp.

References writeByte(), and writeShort().

Referenced by WriteImageTGA().

void WriteImageTGA	(	const string &	name,
		float *	pixels,
		float *	alpha,
		int	xRes,
		int	yRes,
		int	totalXRes,
		int	totalYRes,
		int	xOffset,
		int	yOffset
	)			`[static]`

Save the rgb8888 buffer as Targa 24.

Parameters:

	filename	Path to the file to be written to (need not exist).
	w	Width of the image in pixels.
	h	Height of the image in pixels.
	buf	Ptr to the image data to be written.