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Move some things into renderercommon

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This commit is contained in:
Tim Angus 2013-02-16 12:14:48 +00:00
parent 372b07a97a
commit 93e6183ce3
13 changed files with 13 additions and 3776 deletions
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code/renderercommon/tr_image_jpg.c Normal file
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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "../renderergl1/tr_local.h"
/*
* Include file for users of JPEG library.
* You will need to have included system headers that define at least
* the typedefs FILE and size_t before you can include jpeglib.h.
* (stdio.h is sufficient on ANSI-conforming systems.)
* You may also wish to include "jerror.h".
*/
#ifdef USE_INTERNAL_JPEG
# define JPEG_INTERNALS
#endif
#include <jpeglib.h>
#ifndef USE_INTERNAL_JPEG
# if JPEG_LIB_VERSION < 80
# error Need system libjpeg >= 80
# endif
#endif
static void R_JPGErrorExit(j_common_ptr cinfo)
{
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message) (cinfo, buffer);
/* Let the memory manager delete any temp files before we die */
jpeg_destroy(cinfo);
ri.Error(ERR_FATAL, "%s", buffer);
}
static void R_JPGOutputMessage(j_common_ptr cinfo)
{
char buffer[JMSG_LENGTH_MAX];
/* Create the message */
(*cinfo->err->format_message) (cinfo, buffer);
/* Send it to stderr, adding a newline */
ri.Printf(PRINT_ALL, "%s\n", buffer);
}
void R_LoadJPG(const char *filename, unsigned char **pic, int *width, int *height)
{
/* This struct contains the JPEG decompression parameters and pointers to
* working space (which is allocated as needed by the JPEG library).
*/
struct jpeg_decompress_struct cinfo = {NULL};
/* We use our private extension JPEG error handler.
* Note that this struct must live as long as the main JPEG parameter
* struct, to avoid dangling-pointer problems.
*/
/* This struct represents a JPEG error handler. It is declared separately
* because applications often want to supply a specialized error handler
* (see the second half of this file for an example). But here we just
* take the easy way out and use the standard error handler, which will
* print a message on stderr and call exit() if compression fails.
* Note that this struct must live as long as the main JPEG parameter
* struct, to avoid dangling-pointer problems.
*/
struct jpeg_error_mgr jerr;
/* More stuff */
JSAMPARRAY buffer; /* Output row buffer */
unsigned int row_stride; /* physical row width in output buffer */
unsigned int pixelcount, memcount;
unsigned int sindex, dindex;
byte *out;
int len;
union {
byte *b;
void *v;
} fbuffer;
byte *buf;
/* In this example we want to open the input file before doing anything else,
* so that the setjmp() error recovery below can assume the file is open.
* VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
* requires it in order to read binary files.
*/
len = ri.FS_ReadFile ( ( char * ) filename, &fbuffer.v);
if (!fbuffer.b || len < 0) {
return;
}
/* Step 1: allocate and initialize JPEG decompression object */
/* We have to set up the error handler first, in case the initialization
* step fails. (Unlikely, but it could happen if you are out of memory.)
* This routine fills in the contents of struct jerr, and returns jerr's
* address which we place into the link field in cinfo.
*/
cinfo.err = jpeg_std_error(&jerr);
cinfo.err->error_exit = R_JPGErrorExit;
cinfo.err->output_message = R_JPGOutputMessage;
/* Now we can initialize the JPEG decompression object. */
jpeg_create_decompress(&cinfo);
/* Step 2: specify data source (eg, a file) */
jpeg_mem_src(&cinfo, fbuffer.b, len);
/* Step 3: read file parameters with jpeg_read_header() */
(void) jpeg_read_header(&cinfo, TRUE);
/* We can ignore the return value from jpeg_read_header since
* (a) suspension is not possible with the stdio data source, and
* (b) we passed TRUE to reject a tables-only JPEG file as an error.
* See libjpeg.doc for more info.
*/
/* Step 4: set parameters for decompression */
/*
* Make sure it always converts images to RGB color space. This will
* automatically convert 8-bit greyscale images to RGB as well.
*/
cinfo.out_color_space = JCS_RGB;
/* Step 5: Start decompressor */
(void) jpeg_start_decompress(&cinfo);
/* We can ignore the return value since suspension is not possible
* with the stdio data source.
*/
/* We may need to do some setup of our own at this point before reading
* the data. After jpeg_start_decompress() we have the correct scaled
* output image dimensions available, as well as the output colormap
* if we asked for color quantization.
* In this example, we need to make an output work buffer of the right size.
*/
/* JSAMPLEs per row in output buffer */
pixelcount = cinfo.output_width * cinfo.output_height;
if(!cinfo.output_width || !cinfo.output_height
|| ((pixelcount * 4) / cinfo.output_width) / 4 != cinfo.output_height
|| pixelcount > 0x1FFFFFFF || cinfo.output_components != 3
)
{
// Free the memory to make sure we don't leak memory
ri.FS_FreeFile (fbuffer.v);
jpeg_destroy_decompress(&cinfo);
ri.Error(ERR_DROP, "LoadJPG: %s has an invalid image format: %dx%d*4=%d, components: %d", filename,
cinfo.output_width, cinfo.output_height, pixelcount * 4, cinfo.output_components);
}
memcount = pixelcount * 4;
row_stride = cinfo.output_width * cinfo.output_components;
out = ri.Malloc(memcount);
*width = cinfo.output_width;
*height = cinfo.output_height;
/* Step 6: while (scan lines remain to be read) */
/* jpeg_read_scanlines(...); */
/* Here we use the library's state variable cinfo.output_scanline as the
* loop counter, so that we don't have to keep track ourselves.
*/
while (cinfo.output_scanline < cinfo.output_height) {
/* jpeg_read_scanlines expects an array of pointers to scanlines.
* Here the array is only one element long, but you could ask for
* more than one scanline at a time if that's more convenient.
*/
buf = ((out+(row_stride*cinfo.output_scanline)));
buffer = &buf;
(void) jpeg_read_scanlines(&cinfo, buffer, 1);
}
buf = out;
// Expand from RGB to RGBA
sindex = pixelcount * cinfo.output_components;
dindex = memcount;
do
{
buf[--dindex] = 255;
buf[--dindex] = buf[--sindex];
buf[--dindex] = buf[--sindex];
buf[--dindex] = buf[--sindex];
} while(sindex);
*pic = out;
/* Step 7: Finish decompression */
jpeg_finish_decompress(&cinfo);
/* We can ignore the return value since suspension is not possible
* with the stdio data source.
*/
/* Step 8: Release JPEG decompression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_decompress(&cinfo);
/* After finish_decompress, we can close the input file.
* Here we postpone it until after no more JPEG errors are possible,
* so as to simplify the setjmp error logic above. (Actually, I don't
* think that jpeg_destroy can do an error exit, but why assume anything...)
*/
ri.FS_FreeFile (fbuffer.v);
/* At this point you may want to check to see whether any corrupt-data
* warnings occurred (test whether jerr.pub.num_warnings is nonzero).
*/
/* And we're done! */
}
/* Expanded data destination object for stdio output */
typedef struct {
struct jpeg_destination_mgr pub; /* public fields */
byte* outfile; /* target stream */
int size;
} my_destination_mgr;
typedef my_destination_mgr * my_dest_ptr;
/*
* Initialize destination --- called by jpeg_start_compress
* before any data is actually written.
*/
static void
init_destination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
dest->pub.next_output_byte = dest->outfile;
dest->pub.free_in_buffer = dest->size;
}
/*
* Empty the output buffer --- called whenever buffer fills up.
*
* In typical applications, this should write the entire output buffer
* (ignoring the current state of next_output_byte & free_in_buffer),
* reset the pointer & count to the start of the buffer, and return TRUE
* indicating that the buffer has been dumped.
*
* In applications that need to be able to suspend compression due to output
* overrun, a FALSE return indicates that the buffer cannot be emptied now.
* In this situation, the compressor will return to its caller (possibly with
* an indication that it has not accepted all the supplied scanlines). The
* application should resume compression after it has made more room in the
* output buffer. Note that there are substantial restrictions on the use of
* suspension --- see the documentation.
*
* When suspending, the compressor will back up to a convenient restart point
* (typically the start of the current MCU). next_output_byte & free_in_buffer
* indicate where the restart point will be if the current call returns FALSE.
* Data beyond this point will be regenerated after resumption, so do not
* write it out when emptying the buffer externally.
*/
static boolean
empty_output_buffer (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
jpeg_destroy_compress(cinfo);
// Make crash fatal or we would probably leak memory.
ri.Error(ERR_FATAL, "Output buffer for encoded JPEG image has insufficient size of %d bytes",
dest->size);
return FALSE;
}
/*
* Terminate destination --- called by jpeg_finish_compress
* after all data has been written. Usually needs to flush buffer.
*
* NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
* application must deal with any cleanup that should happen even
* for error exit.
*/
static void term_destination(j_compress_ptr cinfo)
{
}
/*
* Prepare for output to a stdio stream.
* The caller must have already opened the stream, and is responsible
* for closing it after finishing compression.
*/
static void
jpegDest (j_compress_ptr cinfo, byte* outfile, int size)
{
my_dest_ptr dest;
/* The destination object is made permanent so that multiple JPEG images
* can be written to the same file without re-executing jpeg_stdio_dest.
* This makes it dangerous to use this manager and a different destination
* manager serially with the same JPEG object, because their private object
* sizes may be different. Caveat programmer.
*/
if (cinfo->dest == NULL) { /* first time for this JPEG object? */
cinfo->dest = (struct jpeg_destination_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
sizeof(my_destination_mgr));
}
dest = (my_dest_ptr) cinfo->dest;
dest->pub.init_destination = init_destination;
dest->pub.empty_output_buffer = empty_output_buffer;
dest->pub.term_destination = term_destination;
dest->outfile = outfile;
dest->size = size;
}
/*
=================
SaveJPGToBuffer
Encodes JPEG from image in image_buffer and writes to buffer.
Expects RGB input data
=================
*/
size_t RE_SaveJPGToBuffer(byte *buffer, size_t bufSize, int quality,
int image_width, int image_height, byte *image_buffer, int padding)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
my_dest_ptr dest;
int row_stride; /* physical row width in image buffer */
size_t outcount;
/* Step 1: allocate and initialize JPEG compression object */
cinfo.err = jpeg_std_error(&jerr);
cinfo.err->error_exit = R_JPGErrorExit;
cinfo.err->output_message = R_JPGOutputMessage;
/* Now we can initialize the JPEG compression object. */
jpeg_create_compress(&cinfo);
/* Step 2: specify data destination (eg, a file) */
/* Note: steps 2 and 3 can be done in either order. */
jpegDest(&cinfo, buffer, bufSize);
/* Step 3: set parameters for compression */
cinfo.image_width = image_width; /* image width and height, in pixels */
cinfo.image_height = image_height;
cinfo.input_components = 3; /* # of color components per pixel */
cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
/* If quality is set high, disable chroma subsampling */
if (quality >= 85) {
cinfo.comp_info[0].h_samp_factor = 1;
cinfo.comp_info[0].v_samp_factor = 1;
}
/* Step 4: Start compressor */
jpeg_start_compress(&cinfo, TRUE);
/* Step 5: while (scan lines remain to be written) */
/* jpeg_write_scanlines(...); */
row_stride = image_width * cinfo.input_components + padding; /* JSAMPLEs per row in image_buffer */
while (cinfo.next_scanline < cinfo.image_height) {
/* jpeg_write_scanlines expects an array of pointers to scanlines.
* Here the array is only one element long, but you could pass
* more than one scanline at a time if that's more convenient.
*/
row_pointer[0] = &image_buffer[((cinfo.image_height-1)*row_stride)-cinfo.next_scanline * row_stride];
(void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
/* Step 6: Finish compression */
jpeg_finish_compress(&cinfo);
dest = (my_dest_ptr) cinfo.dest;
outcount = dest->size - dest->pub.free_in_buffer;
/* Step 7: release JPEG compression object */
jpeg_destroy_compress(&cinfo);
/* And we're done! */
return outcount;
}
void RE_SaveJPG(char * filename, int quality, int image_width, int image_height, byte *image_buffer, int padding)
{
byte *out;
size_t bufSize;
bufSize = image_width * image_height * 3;
out = ri.Hunk_AllocateTempMemory(bufSize);
bufSize = RE_SaveJPGToBuffer(out, bufSize, quality, image_width, image_height, image_buffer, padding);
ri.FS_WriteFile(filename, out, bufSize);
ri.Hunk_FreeTempMemory(out);
}