X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=blobdiff_plain;f=jpeg.c;h=44e53e4216074c20d62bd08952205923fc0a8343;hp=26c8318ee9bad5177550d4326ec765770c819916;hb=35a210359bf175b1798c62e196116a19b7181006;hpb=cba0d8d38b4a7c740e5cc47231b17b3beb648d22 diff --git a/jpeg.c b/jpeg.c index 26c8318e..44e53e42 100644 --- a/jpeg.c +++ b/jpeg.c @@ -23,9 +23,40 @@ #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 +#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 /* ================================================================= @@ -37,18 +68,12 @@ ================================================================= */ -// jboolean is qbyte instead of int on Win32 -#ifdef WIN32 -typedef qbyte jboolean; -#else -typedef int jboolean; -#endif - -#define JPEG_LIB_VERSION 62 // Version 6b - 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, @@ -80,16 +105,16 @@ typedef unsigned int JDIMENSION; struct jpeg_memory_mgr { void* (*alloc_small) (j_common_ptr cinfo, int pool_id, size_t sizeofobject); - void (*alloc_large) (); - void (*alloc_sarray) (); - void (*alloc_barray) (); - void (*request_virt_sarray) (); - void (*request_virt_barray) (); - void (*realize_virt_arrays) (); - void (*access_virt_sarray) (); - void (*access_virt_barray) (); - void (*free_pool) (); - void (*self_destruct) (); + 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; @@ -118,7 +143,7 @@ struct jpeg_error_mgr struct jpeg_source_mgr { - const qbyte *next_input_byte; + const unsigned char *next_input_byte; size_t bytes_in_buffer; void (*init_source) (j_decompress_ptr cinfo); @@ -128,6 +153,71 @@ struct jpeg_source_mgr 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 @@ -182,21 +272,21 @@ struct jpeg_decompress_struct void *dc_huff_tbl_ptrs[NUM_HUFF_TBLS]; void *ac_huff_tbl_ptrs[NUM_HUFF_TBLS]; int data_precision; - void *comp_info; + jpeg_component_info *comp_info; jboolean progressive_mode; jboolean arith_code; - qbyte arith_dc_L[NUM_ARITH_TBLS]; - qbyte arith_dc_U[NUM_ARITH_TBLS]; - qbyte arith_ac_K[NUM_ARITH_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]; unsigned int restart_interval; jboolean saw_JFIF_marker; - qbyte JFIF_major_version; - qbyte JFIF_minor_version; - qbyte density_unit; + 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; - qbyte Adobe_transform; + unsigned char Adobe_transform; jboolean CCIR601_sampling; void *marker_list; int max_h_samp_factor; @@ -205,7 +295,7 @@ struct jpeg_decompress_struct JDIMENSION total_iMCU_rows; void *sample_range_limit; int comps_in_scan; - void *cur_comp_info[MAX_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; @@ -245,13 +335,13 @@ struct jpeg_compress_struct int num_components; J_COLOR_SPACE jpeg_color_space; - void *comp_info; + 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]; - qbyte arith_dc_L[NUM_ARITH_TBLS]; - qbyte arith_dc_U[NUM_ARITH_TBLS]; - qbyte arith_ac_K[NUM_ARITH_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; @@ -266,9 +356,9 @@ struct jpeg_compress_struct int restart_in_rows; jboolean write_JFIF_header; - qbyte JFIF_major_version; - qbyte JFIF_minor_version; - qbyte density_unit; + 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; @@ -279,7 +369,7 @@ struct jpeg_compress_struct int max_v_samp_factor; JDIMENSION total_iMCU_rows; int comps_in_scan; - void *cur_comp_info[MAX_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; @@ -301,7 +391,7 @@ struct jpeg_compress_struct struct jpeg_destination_mgr { - qbyte* next_output_byte; + unsigned char* next_output_byte; size_t free_in_buffer; void (*init_destination) (j_compress_ptr cinfo); @@ -332,13 +422,14 @@ 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, qbyte** scanlines, JDIMENSION max_lines); +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, qbyte** scanlines, JDIMENSION num_lines); +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[] = { @@ -357,14 +448,18 @@ static dllfunction_t jpegfuncs[] = {"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 qbyte jpeg_eoi_marker [2] = {0xFF, JPEG_EOI}; -static qboolean error_in_jpeg; +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 @@ -372,7 +467,8 @@ typedef struct struct jpeg_destination_mgr pub; qfile_t* outfile; - qbyte* buffer; + unsigned char* buffer; + size_t bufsize; // used if outfile is NULL } my_destination_mgr; typedef my_destination_mgr* my_dest_ptr; @@ -394,41 +490,40 @@ Try to load the JPEG DLL */ qboolean JPEG_OpenLibrary (void) { - const char* dllname; - const dllfunction_t *func; +#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; -#ifdef WIN32 - dllname = "libjpeg.dll"; -#else - dllname = "libjpeg.so.62"; -#endif - - // Initializations - for (func = jpegfuncs; func && func->name != NULL; func++) - *func->funcvariable = NULL; - - // Load the DLL - if (! (jpeg_dll = Sys_LoadLibrary (dllname))) - { - Con_Printf ("Can't find %s. JPEG support disabled\n", dllname); + if (jpeg_tried_loading) // only try once return false; - } - // Get the function adresses - for (func = jpegfuncs; func && func->name != NULL; func++) - if (!(*func->funcvariable = (void *) Sys_GetProcAddress (jpeg_dll, func->name))) - { - Con_Printf ("missing function \"%s\" - broken JPEG library!\n", func->name); - JPEG_CloseLibrary (); - return false; - } + jpeg_tried_loading = true; - Con_Printf ("%s loaded. JPEG support enabled\n", dllname); - return 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 } @@ -441,11 +536,10 @@ Unload the JPEG DLL */ void JPEG_CloseLibrary (void) { - if (!jpeg_dll) - return; - - Sys_UnloadLibrary (jpeg_dll); - jpeg_dll = NULL; +#ifndef LINK_TO_LIBJPEG + Sys_UnloadLibrary (&jpeg_dll); + jpeg_tried_loading = false; // allow retry +#endif } @@ -480,12 +574,12 @@ static void JPEG_SkipInputData (j_decompress_ptr cinfo, long num_bytes) cinfo->src->bytes_in_buffer -= num_bytes; } -static void JPEG_MemSrc (j_decompress_ptr cinfo, qbyte *buffer) +static void JPEG_MemSrc (j_decompress_ptr cinfo, const unsigned char *buffer, size_t filesize) { - cinfo->src = cinfo->mem->alloc_small ((j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)); + 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 = fs_filesize; + cinfo->src->bytes_in_buffer = filesize; cinfo->src->init_source = JPEG_Noop; cinfo->src->fill_input_buffer = JPEG_FillInputBuffer; @@ -497,7 +591,7 @@ static void JPEG_MemSrc (j_decompress_ptr cinfo, qbyte *buffer) static void JPEG_ErrorExit (j_common_ptr cinfo) { ((struct jpeg_decompress_struct*)cinfo)->err->output_message (cinfo); - error_in_jpeg = true; + longjmp(error_in_jpeg, 1); } @@ -505,47 +599,53 @@ static void JPEG_ErrorExit (j_common_ptr cinfo) ==================== JPEG_LoadImage -Load a JPEG image into a RGBA buffer +Load a JPEG image into a BGRA buffer ==================== */ -qbyte* JPEG_LoadImage (qbyte *f, int matchwidth, int matchheight) +unsigned char* JPEG_LoadImage_BGRA (const unsigned char *f, int filesize, int *miplevel) { struct jpeg_decompress_struct cinfo; struct jpeg_error_mgr jerr; - qbyte *image_rgba, *scanline; + 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); - JPEG_MemSrc (&cinfo, f); + 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.image_width; - image_height = cinfo.image_height; + image_width = cinfo.output_width; + image_height = cinfo.output_height; - if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight)) - { - qjpeg_finish_decompress (&cinfo); - qjpeg_destroy_decompress (&cinfo); - return NULL; - } - if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0) + 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_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4); - scanline = Mem_Alloc(tempmempool, image_width * cinfo.output_components); - if (!image_rgba || !scanline) + 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_rgba) - Mem_Free (image_rgba); + 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); @@ -557,22 +657,22 @@ qbyte* JPEG_LoadImage (qbyte *f, int matchwidth, int matchheight) line = 0; while (cinfo.output_scanline < cinfo.output_height) { - qbyte *buffer_ptr; + unsigned char *buffer_ptr; int ind; qjpeg_read_scanlines (&cinfo, &scanline, 1); - // Convert the image to RGBA + // Convert the image to BGRA switch (cinfo.output_components) { // RGB images case 3: - buffer_ptr = &image_rgba[image_width * line * 4]; + buffer_ptr = &image_buffer[image_width * line * 4]; for (ind = 0; ind < image_width * 3; ind += 3, buffer_ptr += 4) { - buffer_ptr[0] = scanline[ind]; + buffer_ptr[2] = scanline[ind]; buffer_ptr[1] = scanline[ind + 1]; - buffer_ptr[2] = scanline[ind + 2]; + buffer_ptr[0] = scanline[ind + 2]; buffer_ptr[3] = 255; } break; @@ -580,7 +680,7 @@ qbyte* JPEG_LoadImage (qbyte *f, int matchwidth, int matchheight) // Greyscale images (default to it, just in case) case 1: default: - buffer_ptr = &image_rgba[image_width * line * 4]; + buffer_ptr = &image_buffer[image_width * line * 4]; for (ind = 0; ind < image_width; ind++, buffer_ptr += 4) { buffer_ptr[0] = scanline[ind]; @@ -592,12 +692,23 @@ qbyte* JPEG_LoadImage (qbyte *f, int matchwidth, int matchheight) line++; } - Mem_Free (scanline); + Mem_Free (scanline); scanline = NULL; qjpeg_finish_decompress (&cinfo); qjpeg_destroy_decompress (&cinfo); - return image_rgba; + 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; } @@ -613,7 +724,7 @@ qbyte* JPEG_LoadImage (qbyte *f, int matchwidth, int matchheight) static void JPEG_InitDestination (j_compress_ptr cinfo) { my_dest_ptr dest = (my_dest_ptr)cinfo->dest; - dest->buffer = (qbyte*)cinfo->mem->alloc_small ((j_common_ptr) cinfo, JPOOL_IMAGE, JPEG_OUTPUT_BUF_SIZE * sizeof(qbyte)); + 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; } @@ -623,10 +734,7 @@ 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) - { - error_in_jpeg = true; - return false; - } + longjmp(error_in_jpeg, 1); dest->pub.next_output_byte = dest->buffer; dest->pub.free_in_buffer = JPEG_OUTPUT_BUF_SIZE; @@ -640,11 +748,11 @@ static void JPEG_TermDestination (j_compress_ptr cinfo) // Write any data remaining in the buffer if (datacount > 0) - if (FS_Write (dest->outfile, dest->buffer, datacount) != datacount) - error_in_jpeg = true; + if (FS_Write (dest->outfile, dest->buffer, datacount) != (fs_offset_t)datacount) + longjmp(error_in_jpeg, 1); } -static void JPEG_MemDest (j_compress_ptr cinfo, qfile_t* outfile) +static void JPEG_FileDest (j_compress_ptr cinfo, qfile_t* outfile) { my_dest_ptr dest; @@ -659,6 +767,45 @@ static void JPEG_MemDest (j_compress_ptr cinfo, qfile_t* outfile) 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; +} + /* ==================== @@ -667,32 +814,33 @@ JPEG_SaveImage_preflipped Save a preflipped JPEG image to a file ==================== */ -qboolean JPEG_SaveImage_preflipped (const char *filename, int width, int height, qbyte *data) +qboolean JPEG_SaveImage_preflipped (const char *filename, int width, int height, unsigned char *data) { struct jpeg_compress_struct cinfo; struct jpeg_error_mgr jerr; - qbyte *scanline; + unsigned char *scanline; unsigned int offset, linesize; qfile_t* file; // No DLL = no JPEGs if (!jpeg_dll) { - Con_Printf ("You need the libjpeg library to save JPEG images\n"); + Con_Print("You need the libjpeg library to save JPEG images\n"); return false; } // Open the file - file = FS_Open (filename, "wb", true); + 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; - error_in_jpeg = false; qjpeg_create_compress (&cinfo); - JPEG_MemDest (&cinfo, file); + JPEG_FileDest (&cinfo, file); // Set the parameters for compression cinfo.image_width = width; @@ -700,7 +848,18 @@ qboolean JPEG_SaveImage_preflipped (const char *filename, int width, int height, cinfo.in_color_space = JCS_RGB; cinfo.input_components = 3; qjpeg_set_defaults (&cinfo); - qjpeg_set_quality (&cinfo, 90, TRUE); // 90% quality; FIXME: use a cvar + 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 @@ -711,8 +870,6 @@ qboolean JPEG_SaveImage_preflipped (const char *filename, int width, int height, scanline = &data[offset - cinfo.next_scanline * linesize]; qjpeg_write_scanlines (&cinfo, &scanline, 1); - if (error_in_jpeg) - break; } qjpeg_finish_compress (&cinfo); @@ -720,4 +877,238 @@ qboolean JPEG_SaveImage_preflipped (const char *filename, int width, int height, 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 = (int)((100 * jpegsize - 41000) / (width*height) + 2); // fits random data + quality_guess = (int)((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); }