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/*
Copyright (C) 2002 Mathieu Olivier
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#include "quakedef.h"
#include "image.h"
#include "jpeg.h"
#include "image_png.h"
cvar_t sv_writepicture_quality = {CVAR_SAVE, "sv_writepicture_quality", "10", "WritePicture quality offset (higher means better quality, but slower)"};
cvar_t r_texture_jpeg_fastpicmip = {CVAR_SAVE, "r_texture_jpeg_fastpicmip", "1", "perform gl_picmip during decompression for JPEG files (faster)"};
// jboolean is unsigned char instead of int on Win32
#ifdef WIN32
typedef unsigned char jboolean;
#else
typedef int jboolean;
#endif
#ifdef LINK_TO_LIBJPEG
#include <jpeglib.h>
#define qjpeg_create_compress jpeg_create_compress
#define qjpeg_create_decompress jpeg_create_decompress
#define qjpeg_destroy_compress jpeg_destroy_compress
#define qjpeg_destroy_decompress jpeg_destroy_decompress
#define qjpeg_finish_compress jpeg_finish_compress
#define qjpeg_finish_decompress jpeg_finish_decompress
#define qjpeg_resync_to_restart jpeg_resync_to_restart
#define qjpeg_read_header jpeg_read_header
#define qjpeg_read_scanlines jpeg_read_scanlines
#define qjpeg_set_defaults jpeg_set_defaults
#define qjpeg_set_quality jpeg_set_quality
#define qjpeg_start_compress jpeg_start_compress
#define qjpeg_start_decompress jpeg_start_decompress
#define qjpeg_std_error jpeg_std_error
#define qjpeg_write_scanlines jpeg_write_scanlines
#define qjpeg_simple_progression jpeg_simple_progression
#define jpeg_dll true
#else
/*
=================================================================
Minimal set of definitions from the JPEG lib
WARNING: for a matter of simplicity, several pointer types are
casted to "void*", and most enumerated values are not included
=================================================================
*/
typedef void *j_common_ptr;
typedef struct jpeg_compress_struct *j_compress_ptr;
typedef struct jpeg_decompress_struct *j_decompress_ptr;
#define JPEG_LIB_VERSION 62 // Version 6b
typedef enum
{
JCS_UNKNOWN,
JCS_GRAYSCALE,
JCS_RGB,
JCS_YCbCr,
JCS_CMYK,
JCS_YCCK
} J_COLOR_SPACE;
typedef enum {JPEG_DUMMY1} J_DCT_METHOD;
typedef enum {JPEG_DUMMY2} J_DITHER_MODE;
typedef unsigned int JDIMENSION;
#define JPOOL_PERMANENT 0 // lasts until master record is destroyed
#define JPOOL_IMAGE 1 // lasts until done with image/datastream
#define JPEG_EOI 0xD9 // EOI marker code
#define JMSG_STR_PARM_MAX 80
#define DCTSIZE2 64
#define NUM_QUANT_TBLS 4
#define NUM_HUFF_TBLS 4
#define NUM_ARITH_TBLS 16
#define MAX_COMPS_IN_SCAN 4
#define C_MAX_BLOCKS_IN_MCU 10
#define D_MAX_BLOCKS_IN_MCU 10
struct jpeg_memory_mgr
{
void* (*alloc_small) (j_common_ptr cinfo, int pool_id, size_t sizeofobject);
void (*_reserve_space_for_alloc_large) (void *dummy, ...);
void (*_reserve_space_for_alloc_sarray) (void *dummy, ...);
void (*_reserve_space_for_alloc_barray) (void *dummy, ...);
void (*_reserve_space_for_request_virt_sarray) (void *dummy, ...);
void (*_reserve_space_for_request_virt_barray) (void *dummy, ...);
void (*_reserve_space_for_realize_virt_arrays) (void *dummy, ...);
void (*_reserve_space_for_access_virt_sarray) (void *dummy, ...);
void (*_reserve_space_for_access_virt_barray) (void *dummy, ...);
void (*_reserve_space_for_free_pool) (void *dummy, ...);
void (*_reserve_space_for_self_destruct) (void *dummy, ...);
long max_memory_to_use;
long max_alloc_chunk;
};
struct jpeg_error_mgr
{
void (*error_exit) (j_common_ptr cinfo);
void (*emit_message) (j_common_ptr cinfo, int msg_level);
void (*output_message) (j_common_ptr cinfo);
void (*format_message) (j_common_ptr cinfo, char * buffer);
void (*reset_error_mgr) (j_common_ptr cinfo);
int msg_code;
union {
int i[8];
char s[JMSG_STR_PARM_MAX];
} msg_parm;
int trace_level;
long num_warnings;
const char * const * jpeg_message_table;
int last_jpeg_message;
const char * const * addon_message_table;
int first_addon_message;
int last_addon_message;
};
struct jpeg_source_mgr
{
const unsigned char *next_input_byte;
size_t bytes_in_buffer;
void (*init_source) (j_decompress_ptr cinfo);
jboolean (*fill_input_buffer) (j_decompress_ptr cinfo);
void (*skip_input_data) (j_decompress_ptr cinfo, long num_bytes);
jboolean (*resync_to_restart) (j_decompress_ptr cinfo, int desired);
void (*term_source) (j_decompress_ptr cinfo);
};
typedef struct {
/* These values are fixed over the whole image. */
/* For compression, they must be supplied by parameter setup; */
/* for decompression, they are read from the SOF marker. */
int component_id; /* identifier for this component (0..255) */
int component_index; /* its index in SOF or cinfo->comp_info[] */
int h_samp_factor; /* horizontal sampling factor (1..4) */
int v_samp_factor; /* vertical sampling factor (1..4) */
int quant_tbl_no; /* quantization table selector (0..3) */
/* These values may vary between scans. */
/* For compression, they must be supplied by parameter setup; */
/* for decompression, they are read from the SOS marker. */
/* The decompressor output side may not use these variables. */
int dc_tbl_no; /* DC entropy table selector (0..3) */
int ac_tbl_no; /* AC entropy table selector (0..3) */
/* Remaining fields should be treated as private by applications. */
/* These values are computed during compression or decompression startup: */
/* Component's size in DCT blocks.
* Any dummy blocks added to complete an MCU are not counted; therefore
* these values do not depend on whether a scan is interleaved or not.
*/
JDIMENSION width_in_blocks;
JDIMENSION height_in_blocks;
/* Size of a DCT block in samples. Always DCTSIZE for compression.
* For decompression this is the size of the output from one DCT block,
* reflecting any scaling we choose to apply during the IDCT step.
* Values of 1,2,4,8 are likely to be supported. Note that different
* components may receive different IDCT scalings.
*/
int DCT_scaled_size;
/* The downsampled dimensions are the component's actual, unpadded number
* of samples at the main buffer (preprocessing/compression interface), thus
* downsampled_width = ceil(image_width * Hi/Hmax)
* and similarly for height. For decompression, IDCT scaling is included, so
* downsampled_width = ceil(image_width * Hi/Hmax * DCT_scaled_size/DCTSIZE)
*/
JDIMENSION downsampled_width; /* actual width in samples */
JDIMENSION downsampled_height; /* actual height in samples */
/* This flag is used only for decompression. In cases where some of the
* components will be ignored (eg grayscale output from YCbCr image),
* we can skip most computations for the unused components.
*/
jboolean component_needed; /* do we need the value of this component? */
/* These values are computed before starting a scan of the component. */
/* The decompressor output side may not use these variables. */
int MCU_width; /* number of blocks per MCU, horizontally */
int MCU_height; /* number of blocks per MCU, vertically */
int MCU_blocks; /* MCU_width * MCU_height */
int MCU_sample_width; /* MCU width in samples, MCU_width*DCT_scaled_size */
int last_col_width; /* # of non-dummy blocks across in last MCU */
int last_row_height; /* # of non-dummy blocks down in last MCU */
/* Saved quantization table for component; NULL if none yet saved.
* See jdinput.c comments about the need for this information.
* This field is currently used only for decompression.
*/
void *quant_table;
/* Private per-component storage for DCT or IDCT subsystem. */
void * dct_table;
} jpeg_component_info;
struct jpeg_decompress_struct
{
struct jpeg_error_mgr *err; // USED
struct jpeg_memory_mgr *mem; // USED
void *progress;
void *client_data;
jboolean is_decompressor;
int global_state;
struct jpeg_source_mgr *src; // USED
JDIMENSION image_width; // USED
JDIMENSION image_height; // USED
int num_components;
J_COLOR_SPACE jpeg_color_space;
J_COLOR_SPACE out_color_space;
unsigned int scale_num, scale_denom;
double output_gamma;
jboolean buffered_image;
jboolean raw_data_out;
J_DCT_METHOD dct_method;
jboolean do_fancy_upsampling;
jboolean do_block_smoothing;
jboolean quantize_colors;
J_DITHER_MODE dither_mode;
jboolean two_pass_quantize;
int desired_number_of_colors;
jboolean enable_1pass_quant;
jboolean enable_external_quant;
jboolean enable_2pass_quant;
JDIMENSION output_width;
JDIMENSION output_height; // USED
int out_color_components;
int output_components; // USED
int rec_outbuf_height;
int actual_number_of_colors;
void *colormap;
JDIMENSION output_scanline; // USED
int input_scan_number;
JDIMENSION input_iMCU_row;
int output_scan_number;
JDIMENSION output_iMCU_row;
int (*coef_bits)[DCTSIZE2];
void *quant_tbl_ptrs[NUM_QUANT_TBLS];
void *dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
void *ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
int data_precision;
jpeg_component_info *comp_info;
jboolean progressive_mode;
jboolean arith_code;
unsigned char arith_dc_L[NUM_ARITH_TBLS];
unsigned char arith_dc_U[NUM_ARITH_TBLS];
unsigned char arith_ac_K[NUM_ARITH_TBLS];
unsigned int restart_interval;
jboolean saw_JFIF_marker;
unsigned char JFIF_major_version;
unsigned char JFIF_minor_version;
unsigned char density_unit;
unsigned short X_density;
unsigned short Y_density;
jboolean saw_Adobe_marker;
unsigned char Adobe_transform;
jboolean CCIR601_sampling;
void *marker_list;
int max_h_samp_factor;
int max_v_samp_factor;
int min_DCT_scaled_size;
JDIMENSION total_iMCU_rows;
void *sample_range_limit;
int comps_in_scan;
jpeg_component_info *cur_comp_info[MAX_COMPS_IN_SCAN];
JDIMENSION MCUs_per_row;
JDIMENSION MCU_rows_in_scan;
int blocks_in_MCU;
int MCU_membership[D_MAX_BLOCKS_IN_MCU];
int Ss, Se, Ah, Al;
int unread_marker;
void *master;
void *main;
void *coef;
void *post;
void *inputctl;
void *marker;
void *entropy;
void *idct;
void *upsample;
void *cconvert;
void *cquantize;
};
struct jpeg_compress_struct
{
struct jpeg_error_mgr *err;
struct jpeg_memory_mgr *mem;
void *progress;
void *client_data;
jboolean is_decompressor;
int global_state;
void *dest;
JDIMENSION image_width;
JDIMENSION image_height;
int input_components;
J_COLOR_SPACE in_color_space;
double input_gamma;
int data_precision;
int num_components;
J_COLOR_SPACE jpeg_color_space;
jpeg_component_info *comp_info;
void *quant_tbl_ptrs[NUM_QUANT_TBLS];
void *dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
void *ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
unsigned char arith_dc_L[NUM_ARITH_TBLS];
unsigned char arith_dc_U[NUM_ARITH_TBLS];
unsigned char arith_ac_K[NUM_ARITH_TBLS];
int num_scans;
const void *scan_info;
jboolean raw_data_in;
jboolean arith_code;
jboolean optimize_coding;
jboolean CCIR601_sampling;
int smoothing_factor;
J_DCT_METHOD dct_method;
unsigned int restart_interval;
int restart_in_rows;
jboolean write_JFIF_header;
unsigned char JFIF_major_version;
unsigned char JFIF_minor_version;
unsigned char density_unit;
unsigned short X_density;
unsigned short Y_density;
jboolean write_Adobe_marker;
JDIMENSION next_scanline;
jboolean progressive_mode;
int max_h_samp_factor;
int max_v_samp_factor;
JDIMENSION total_iMCU_rows;
int comps_in_scan;
jpeg_component_info *cur_comp_info[MAX_COMPS_IN_SCAN];
JDIMENSION MCUs_per_row;
JDIMENSION MCU_rows_in_scan;
int blocks_in_MCU;
int MCU_membership[C_MAX_BLOCKS_IN_MCU];
int Ss, Se, Ah, Al;
void *master;
void *main;
void *prep;
void *coef;
void *marker;
void *cconvert;
void *downsample;
void *fdct;
void *entropy;
void *script_space;
int script_space_size;
};
struct jpeg_destination_mgr
{
unsigned char* next_output_byte;
size_t free_in_buffer;
void (*init_destination) (j_compress_ptr cinfo);
jboolean (*empty_output_buffer) (j_compress_ptr cinfo);
void (*term_destination) (j_compress_ptr cinfo);
};
/*
=================================================================
DarkPlaces definitions
=================================================================
*/
// Functions exported from libjpeg
#define qjpeg_create_compress(cinfo) \
qjpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, (size_t) sizeof(struct jpeg_compress_struct))
#define qjpeg_create_decompress(cinfo) \
qjpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, (size_t) sizeof(struct jpeg_decompress_struct))
static void (*qjpeg_CreateCompress) (j_compress_ptr cinfo, int version, size_t structsize);
static void (*qjpeg_CreateDecompress) (j_decompress_ptr cinfo, int version, size_t structsize);
static void (*qjpeg_destroy_compress) (j_compress_ptr cinfo);
static void (*qjpeg_destroy_decompress) (j_decompress_ptr cinfo);
static void (*qjpeg_finish_compress) (j_compress_ptr cinfo);
static jboolean (*qjpeg_finish_decompress) (j_decompress_ptr cinfo);
static jboolean (*qjpeg_resync_to_restart) (j_decompress_ptr cinfo, int desired);
static int (*qjpeg_read_header) (j_decompress_ptr cinfo, jboolean require_image);
static JDIMENSION (*qjpeg_read_scanlines) (j_decompress_ptr cinfo, unsigned char** scanlines, JDIMENSION max_lines);
static void (*qjpeg_set_defaults) (j_compress_ptr cinfo);
static void (*qjpeg_set_quality) (j_compress_ptr cinfo, int quality, jboolean force_baseline);
static jboolean (*qjpeg_start_compress) (j_compress_ptr cinfo, jboolean write_all_tables);
static jboolean (*qjpeg_start_decompress) (j_decompress_ptr cinfo);
static struct jpeg_error_mgr* (*qjpeg_std_error) (struct jpeg_error_mgr *err);
static JDIMENSION (*qjpeg_write_scanlines) (j_compress_ptr cinfo, unsigned char** scanlines, JDIMENSION num_lines);
static void (*qjpeg_simple_progression) (j_compress_ptr cinfo);
static dllfunction_t jpegfuncs[] =
{
{"jpeg_CreateCompress", (void **) &qjpeg_CreateCompress},
{"jpeg_CreateDecompress", (void **) &qjpeg_CreateDecompress},
{"jpeg_destroy_compress", (void **) &qjpeg_destroy_compress},
{"jpeg_destroy_decompress", (void **) &qjpeg_destroy_decompress},
{"jpeg_finish_compress", (void **) &qjpeg_finish_compress},
{"jpeg_finish_decompress", (void **) &qjpeg_finish_decompress},
{"jpeg_resync_to_restart", (void **) &qjpeg_resync_to_restart},
{"jpeg_read_header", (void **) &qjpeg_read_header},
{"jpeg_read_scanlines", (void **) &qjpeg_read_scanlines},
{"jpeg_set_defaults", (void **) &qjpeg_set_defaults},
{"jpeg_set_quality", (void **) &qjpeg_set_quality},
{"jpeg_start_compress", (void **) &qjpeg_start_compress},
{"jpeg_start_decompress", (void **) &qjpeg_start_decompress},
{"jpeg_std_error", (void **) &qjpeg_std_error},
{"jpeg_write_scanlines", (void **) &qjpeg_write_scanlines},
{"jpeg_simple_progression", (void **) &qjpeg_simple_progression},
{NULL, NULL}
};
// Handle for JPEG DLL
dllhandle_t jpeg_dll = NULL;
qboolean jpeg_tried_loading = 0;
#endif
static unsigned char jpeg_eoi_marker [2] = {0xFF, JPEG_EOI};
static jmp_buf error_in_jpeg;
static qboolean jpeg_toolarge;
// Our own output manager for JPEG compression
typedef struct
{
struct jpeg_destination_mgr pub;
qfile_t* outfile;
unsigned char* buffer;
size_t bufsize; // used if outfile is NULL
} my_destination_mgr;
typedef my_destination_mgr* my_dest_ptr;
/*
=================================================================
DLL load & unload
=================================================================
*/
/*
====================
JPEG_OpenLibrary
Try to load the JPEG DLL
====================
*/
qboolean JPEG_OpenLibrary (void)
{
#ifdef LINK_TO_LIBJPEG
return true;
#else
const char* dllnames [] =
{
#if defined(WIN32)
"libjpeg.dll",
#elif defined(MACOSX)
"libjpeg.62.dylib",
#else
"libjpeg.so.62",
"libjpeg.so",
#endif
NULL
};
// Already loaded?
if (jpeg_dll)
return true;
if (jpeg_tried_loading) // only try once
return false;
jpeg_tried_loading = true;
#ifdef __ANDROID__
// loading the native Android libjpeg.so causes crashes
Con_Printf("Not opening libjpeg.so dynamically on Android - use LINK_TO_LIBJPEG instead if it is needed.\n");
return false;
#endif
// Load the DLL
return Sys_LoadLibrary (dllnames, &jpeg_dll, jpegfuncs);
#endif
}
/*
====================
JPEG_CloseLibrary
Unload the JPEG DLL
====================
*/
void JPEG_CloseLibrary (void)
{
#ifndef LINK_TO_LIBJPEG
Sys_UnloadLibrary (&jpeg_dll);
jpeg_tried_loading = false; // allow retry
#endif
}
/*
=================================================================
JPEG decompression
=================================================================
*/
static void JPEG_Noop (j_decompress_ptr cinfo) {}
static jboolean JPEG_FillInputBuffer (j_decompress_ptr cinfo)
{
// Insert a fake EOI marker
cinfo->src->next_input_byte = jpeg_eoi_marker;
cinfo->src->bytes_in_buffer = 2;
return TRUE;
}
static void JPEG_SkipInputData (j_decompress_ptr cinfo, long num_bytes)
{
if (cinfo->src->bytes_in_buffer <= (unsigned long)num_bytes)
{
cinfo->src->bytes_in_buffer = 0;
return;
}
cinfo->src->next_input_byte += num_bytes;
cinfo->src->bytes_in_buffer -= num_bytes;
}
static void JPEG_MemSrc (j_decompress_ptr cinfo, const unsigned char *buffer, size_t filesize)
{
cinfo->src = (struct jpeg_source_mgr *)cinfo->mem->alloc_small ((j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr));
cinfo->src->next_input_byte = buffer;
cinfo->src->bytes_in_buffer = filesize;
cinfo->src->init_source = JPEG_Noop;
cinfo->src->fill_input_buffer = JPEG_FillInputBuffer;
cinfo->src->skip_input_data = JPEG_SkipInputData;
cinfo->src->resync_to_restart = qjpeg_resync_to_restart; // use the default method
cinfo->src->term_source = JPEG_Noop;
}
static void JPEG_ErrorExit (j_common_ptr cinfo)
{
((struct jpeg_decompress_struct*)cinfo)->err->output_message (cinfo);
longjmp(error_in_jpeg, 1);
}
/*
====================
JPEG_LoadImage
Load a JPEG image into a BGRA buffer
====================
*/
unsigned char* JPEG_LoadImage_BGRA (const unsigned char *f, int filesize, int *miplevel)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
unsigned char *image_buffer = NULL, *scanline = NULL;
unsigned int line;
int submip = 0;
// No DLL = no JPEGs
if (!jpeg_dll)
return NULL;
if(miplevel && r_texture_jpeg_fastpicmip.integer)
submip = bound(0, *miplevel, 3);
cinfo.err = qjpeg_std_error (&jerr);
qjpeg_create_decompress (&cinfo);
if(setjmp(error_in_jpeg))
goto error_caught;
cinfo.err = qjpeg_std_error (&jerr);
cinfo.err->error_exit = JPEG_ErrorExit;
JPEG_MemSrc (&cinfo, f, filesize);
qjpeg_read_header (&cinfo, TRUE);
cinfo.scale_num = 1;
cinfo.scale_denom = (1 << submip);
qjpeg_start_decompress (&cinfo);
image_width = cinfo.output_width;
image_height = cinfo.output_height;
if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
{
Con_Printf("JPEG_LoadImage: invalid image size %ix%i\n", image_width, image_height);
return NULL;
}
image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
scanline = (unsigned char *)Mem_Alloc(tempmempool, image_width * cinfo.output_components);
if (!image_buffer || !scanline)
{
if (image_buffer)
Mem_Free (image_buffer);
if (scanline)
Mem_Free (scanline);
Con_Printf("JPEG_LoadImage: not enough memory for %i by %i image\n", image_width, image_height);
qjpeg_finish_decompress (&cinfo);
qjpeg_destroy_decompress (&cinfo);
return NULL;
}
// Decompress the image, line by line
line = 0;
while (cinfo.output_scanline < cinfo.output_height)
{
unsigned char *buffer_ptr;
int ind;
qjpeg_read_scanlines (&cinfo, &scanline, 1);
// Convert the image to BGRA
switch (cinfo.output_components)
{
// RGB images
case 3:
buffer_ptr = &image_buffer[image_width * line * 4];
for (ind = 0; ind < image_width * 3; ind += 3, buffer_ptr += 4)
{
buffer_ptr[2] = scanline[ind];
buffer_ptr[1] = scanline[ind + 1];
buffer_ptr[0] = scanline[ind + 2];
buffer_ptr[3] = 255;
}
break;
// Greyscale images (default to it, just in case)
case 1:
default:
buffer_ptr = &image_buffer[image_width * line * 4];
for (ind = 0; ind < image_width; ind++, buffer_ptr += 4)
{
buffer_ptr[0] = scanline[ind];
buffer_ptr[1] = scanline[ind];
buffer_ptr[2] = scanline[ind];
buffer_ptr[3] = 255;
}
}
line++;
}
Mem_Free (scanline); scanline = NULL;
qjpeg_finish_decompress (&cinfo);
qjpeg_destroy_decompress (&cinfo);
if(miplevel)
*miplevel -= submip;
return image_buffer;
error_caught:
if(scanline)
Mem_Free (scanline);
if(image_buffer)
Mem_Free (image_buffer);
qjpeg_destroy_decompress (&cinfo);
return NULL;
}
/*
=================================================================
JPEG compression
=================================================================
*/
#define JPEG_OUTPUT_BUF_SIZE 4096
static void JPEG_InitDestination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
dest->buffer = (unsigned char*)cinfo->mem->alloc_small ((j_common_ptr) cinfo, JPOOL_IMAGE, JPEG_OUTPUT_BUF_SIZE * sizeof(unsigned char));
dest->pub.next_output_byte = dest->buffer;
dest->pub.free_in_buffer = JPEG_OUTPUT_BUF_SIZE;
}
static jboolean JPEG_EmptyOutputBuffer (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
if (FS_Write (dest->outfile, dest->buffer, JPEG_OUTPUT_BUF_SIZE) != (size_t) JPEG_OUTPUT_BUF_SIZE)
longjmp(error_in_jpeg, 1);
dest->pub.next_output_byte = dest->buffer;
dest->pub.free_in_buffer = JPEG_OUTPUT_BUF_SIZE;
return true;
}
static void JPEG_TermDestination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
size_t datacount = JPEG_OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
// Write any data remaining in the buffer
if (datacount > 0)
if (FS_Write (dest->outfile, dest->buffer, datacount) != (fs_offset_t)datacount)
longjmp(error_in_jpeg, 1);
}
static void JPEG_FileDest (j_compress_ptr cinfo, qfile_t* outfile)
{
my_dest_ptr dest;
// First time for this JPEG object?
if (cinfo->dest == NULL)
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 = JPEG_InitDestination;
dest->pub.empty_output_buffer = JPEG_EmptyOutputBuffer;
dest->pub.term_destination = JPEG_TermDestination;
dest->outfile = outfile;
}
static void JPEG_Mem_InitDestination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
dest->pub.next_output_byte = dest->buffer;
dest->pub.free_in_buffer = dest->bufsize;
}
static jboolean JPEG_Mem_EmptyOutputBuffer (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
jpeg_toolarge = true;
dest->pub.next_output_byte = dest->buffer;
dest->pub.free_in_buffer = dest->bufsize;
return true;
}
static void JPEG_Mem_TermDestination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
dest->bufsize = dest->pub.next_output_byte - dest->buffer;
}
static void JPEG_MemDest (j_compress_ptr cinfo, void* buf, size_t bufsize)
{
my_dest_ptr dest;
// First time for this JPEG object?
if (cinfo->dest == NULL)
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 = JPEG_Mem_InitDestination;
dest->pub.empty_output_buffer = JPEG_Mem_EmptyOutputBuffer;
dest->pub.term_destination = JPEG_Mem_TermDestination;
dest->outfile = NULL;
dest->buffer = (unsigned char *) buf;
dest->bufsize = bufsize;
}
/*
====================
JPEG_SaveImage_preflipped
Save a preflipped JPEG image to a file
====================
*/
qboolean JPEG_SaveImage_preflipped (const char *filename, int width, int height, unsigned char *data)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
unsigned char *scanline;
unsigned int offset, linesize;
qfile_t* file;
// No DLL = no JPEGs
if (!jpeg_dll)
{
Con_Print("You need the libjpeg library to save JPEG images\n");
return false;
}
// Open the file
file = FS_OpenRealFile(filename, "wb", true);
if (!file)
return false;
if(setjmp(error_in_jpeg))
goto error_caught;
cinfo.err = qjpeg_std_error (&jerr);
cinfo.err->error_exit = JPEG_ErrorExit;
qjpeg_create_compress (&cinfo);
JPEG_FileDest (&cinfo, file);
// Set the parameters for compression
cinfo.image_width = width;
cinfo.image_height = height;
cinfo.in_color_space = JCS_RGB;
cinfo.input_components = 3;
qjpeg_set_defaults (&cinfo);
qjpeg_set_quality (&cinfo, (int)(scr_screenshot_jpeg_quality.value * 100), TRUE);
qjpeg_simple_progression (&cinfo);
// turn off subsampling (to make text look better)
cinfo.optimize_coding = 1;
cinfo.comp_info[0].h_samp_factor = 1;
cinfo.comp_info[0].v_samp_factor = 1;
cinfo.comp_info[1].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[2].h_samp_factor = 1;
cinfo.comp_info[2].v_samp_factor = 1;
qjpeg_start_compress (&cinfo, true);
// Compress each scanline
linesize = cinfo.image_width * 3;
offset = linesize * (cinfo.image_height - 1);
while (cinfo.next_scanline < cinfo.image_height)
{
scanline = &data[offset - cinfo.next_scanline * linesize];
qjpeg_write_scanlines (&cinfo, &scanline, 1);
}
qjpeg_finish_compress (&cinfo);
qjpeg_destroy_compress (&cinfo);
FS_Close (file);
return true;
error_caught:
qjpeg_destroy_compress (&cinfo);
FS_Close (file);
return false;
}
static size_t JPEG_try_SaveImage_to_Buffer (struct jpeg_compress_struct *cinfo, char *jpegbuf, size_t jpegsize, int quality, int width, int height, unsigned char *data)
{
unsigned char *scanline;
unsigned int linesize;
jpeg_toolarge = false;
JPEG_MemDest (cinfo, jpegbuf, jpegsize);
// Set the parameters for compression
cinfo->image_width = width;
cinfo->image_height = height;
cinfo->in_color_space = JCS_RGB;
cinfo->input_components = 3;
qjpeg_set_defaults (cinfo);
qjpeg_set_quality (cinfo, quality, FALSE);
cinfo->comp_info[0].h_samp_factor = 2;
cinfo->comp_info[0].v_samp_factor = 2;
cinfo->comp_info[1].h_samp_factor = 1;
cinfo->comp_info[1].v_samp_factor = 1;
cinfo->comp_info[2].h_samp_factor = 1;
cinfo->comp_info[2].v_samp_factor = 1;
cinfo->optimize_coding = 1;
qjpeg_start_compress (cinfo, true);
// Compress each scanline
linesize = width * 3;
while (cinfo->next_scanline < cinfo->image_height)
{
scanline = &data[cinfo->next_scanline * linesize];
qjpeg_write_scanlines (cinfo, &scanline, 1);
}
qjpeg_finish_compress (cinfo);
if(jpeg_toolarge)
return 0;
return ((my_dest_ptr) cinfo->dest)->bufsize;
}
size_t JPEG_SaveImage_to_Buffer (char *jpegbuf, size_t jpegsize, int width, int height, unsigned char *data)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
int quality;
int quality_guess;
size_t result;
// No DLL = no JPEGs
if (!jpeg_dll)
{
Con_Print("You need the libjpeg library to save JPEG images\n");
return false;
}
if(setjmp(error_in_jpeg))
goto error_caught;
cinfo.err = qjpeg_std_error (&jerr);
cinfo.err->error_exit = JPEG_ErrorExit;
qjpeg_create_compress (&cinfo);
#if 0
// used to get the formula below
{
char buf[1048576];
unsigned char *img;
int i;
img = Mem_Alloc(tempmempool, width * height * 3);
for(i = 0; i < width * height * 3; ++i)
img[i] = rand() & 0xFF;
for(i = 0; i <= 100; ++i)
{
Con_Printf("! %d %d %d %d\n", width, height, i, (int) JPEG_try_SaveImage_to_Buffer(&cinfo, buf, sizeof(buf), i, width, height, img));
}
Mem_Free(img);
}
#endif
//quality_guess = (100 * jpegsize - 41000) / (width*height) + 2; // fits random data
quality_guess = (256 * jpegsize - 81920) / (width*height) - 8; // fits Nexuiz's/Xonotic's map pictures
quality_guess = bound(0, quality_guess, 100);
quality = bound(0, quality_guess + sv_writepicture_quality.integer, 100); // assume it can do 10 failed attempts
while(!(result = JPEG_try_SaveImage_to_Buffer(&cinfo, jpegbuf, jpegsize, quality, width, height, data)))
{
--quality;
if(quality < 0)
{
Con_Printf("couldn't write image at all, probably too big\n");
return 0;
}
}
qjpeg_destroy_compress (&cinfo);
Con_DPrintf("JPEG_SaveImage_to_Buffer: guessed quality/size %d/%d, actually got %d/%d\n", quality_guess, (int)jpegsize, quality, (int)result);
return result;
error_caught:
qjpeg_destroy_compress (&cinfo);
return 0;
}
typedef struct CompressedImageCacheItem
{
char imagename[MAX_QPATH];
size_t maxsize;
void *compressed;
size_t compressed_size;
struct CompressedImageCacheItem *next;
}
CompressedImageCacheItem;
#define COMPRESSEDIMAGECACHE_SIZE 4096
static CompressedImageCacheItem *CompressedImageCache[COMPRESSEDIMAGECACHE_SIZE];
static void CompressedImageCache_Add(const char *imagename, size_t maxsize, void *compressed, size_t compressed_size)
{
char vabuf[1024];
const char *hashkey = va(vabuf, sizeof(vabuf), "%s:%d", imagename, (int) maxsize);
int hashindex = CRC_Block((unsigned char *) hashkey, strlen(hashkey)) % COMPRESSEDIMAGECACHE_SIZE;
CompressedImageCacheItem *i;
if(strlen(imagename) >= MAX_QPATH)
return; // can't add this
i = (CompressedImageCacheItem*) Z_Malloc(sizeof(CompressedImageCacheItem));
strlcpy(i->imagename, imagename, sizeof(i->imagename));
i->maxsize = maxsize;
i->compressed = compressed;
i->compressed_size = compressed_size;
i->next = CompressedImageCache[hashindex];
CompressedImageCache[hashindex] = i;
}
static CompressedImageCacheItem *CompressedImageCache_Find(const char *imagename, size_t maxsize)
{
char vabuf[1024];
const char *hashkey = va(vabuf, sizeof(vabuf), "%s:%d", imagename, (int) maxsize);
int hashindex = CRC_Block((unsigned char *) hashkey, strlen(hashkey)) % COMPRESSEDIMAGECACHE_SIZE;
CompressedImageCacheItem *i = CompressedImageCache[hashindex];
while(i)
{
if(i->maxsize == maxsize)
if(!strcmp(i->imagename, imagename))
return i;
i = i->next;
}
return NULL;
}
qboolean Image_Compress(const char *imagename, size_t maxsize, void **buf, size_t *size)
{
unsigned char *imagedata, *newimagedata;
int maxPixelCount;
int components[3] = {2, 1, 0};
CompressedImageCacheItem *i;
JPEG_OpenLibrary (); // for now; LH had the idea of replacing this by a better format
PNG_OpenLibrary (); // for loading
// No DLL = no JPEGs
if (!jpeg_dll)
{
Con_Print("You need the libjpeg library to save JPEG images\n");
return false;
}
i = CompressedImageCache_Find(imagename, maxsize);
if(i)
{
*size = i->compressed_size;
*buf = i->compressed;
}
// load the image
imagedata = loadimagepixelsbgra(imagename, true, false, false, NULL);
if(!imagedata)
return false;
// find an appropriate size for somewhat okay compression
if(maxsize <= 768)
maxPixelCount = 32 * 32;
else if(maxsize <= 1024)
maxPixelCount = 64 * 64;
else if(maxsize <= 4096)
maxPixelCount = 128 * 128;
else
maxPixelCount = 256 * 256;
while(image_width * image_height > maxPixelCount)
{
int one = 1;
Image_MipReduce32(imagedata, imagedata, &image_width, &image_height, &one, image_width/2, image_height/2, 1);
}
newimagedata = (unsigned char *) Mem_Alloc(tempmempool, image_width * image_height * 3);
// convert the image from BGRA to RGB
Image_CopyMux(newimagedata, imagedata, image_width, image_height, false, false, false, 3, 4, components);
Mem_Free(imagedata);
// try to compress it to JPEG
*buf = Z_Malloc(maxsize);
*size = JPEG_SaveImage_to_Buffer((char *) *buf, maxsize, image_width, image_height, newimagedata);
Mem_Free(newimagedata);
if(!*size)
{
Z_Free(*buf);
*buf = NULL;
Con_Printf("could not compress image %s to %d bytes\n", imagename, (int)maxsize);
// return false;
// also cache failures!
}
// store it in the cache
CompressedImageCache_Add(imagename, maxsize, *buf, *size);
return (*buf != NULL);
}
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