From a854130c17f1490cf5fb25650994c12d8c9ad0a7 Mon Sep 17 00:00:00 2001
From: divverent <divverent@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Mon, 20 Jul 2009 15:30:38 +0000
Subject: [PATCH] experimental makefile option make DP_LINK_TO_JPEG=1 - use
 libjpeg.h instead of dynamic loading of libjpeg at startup.

Can anyone test this against libjpeg7?


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9064 d7cf8633-e32d-0410-b094-e92efae38249
---
 BSDmakefile |  8 ++++++++
 jpeg.c      | 45 ++++++++++++++++++++++++++++++++++++---------
 makefile    |  8 ++++++++
 3 files changed, 52 insertions(+), 9 deletions(-)

diff --git a/BSDmakefile b/BSDmakefile
index 23563cd3..24012acb 100644
--- a/BSDmakefile
+++ b/BSDmakefile
@@ -87,6 +87,14 @@ LDFLAGS_SDL+=$(LDFLAGS_UNIXSDL_PRELOAD)
 CFLAGS_PRELOAD=$(CFLAGS_UNIX_PRELOAD)
 .endif
 
+.ifdef DP_LINK_TO_LIBJPEG
+LDFLAGS_LIBJPEG?=-ljpeg
+LDFLAGS_CL+=$(LDFLAGS_LIBJPEG)
+LDFLAGS_SV+=$(LDFLAGS_LIBJPEG)
+LDFLAGS_SDL+=$(LDFLAGS_LIBJPEG)
+CFLAGS_PRELOAD+=$(CFLAGS_LIBJPEG) -DLINK_TO_LIBJPEG
+.endif
+
 
 ##### BSD Make specific definitions #####
 
diff --git a/jpeg.c b/jpeg.c
index 936bc551..5d09b498 100644
--- a/jpeg.c
+++ b/jpeg.c
@@ -28,6 +28,32 @@
 
 cvar_t sv_writepicture_quality = {CVAR_SAVE, "sv_writepicture_quality", "10", "WritePicture quality offset (higher means better quality, but slower)"};
 
+// 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 jpeg_dll true
+#else
 /*
 =================================================================
 
@@ -39,18 +65,12 @@ cvar_t sv_writepicture_quality = {CVAR_SAVE, "sv_writepicture_quality", "10", "W
 =================================================================
 */
 
-// jboolean is unsigned char instead of int on Win32
-#ifdef WIN32
-typedef unsigned char 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,
@@ -430,6 +450,7 @@ static dllfunction_t jpegfuncs[] =
 // 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;
@@ -464,6 +485,9 @@ Try to load the JPEG DLL
 */
 qboolean JPEG_OpenLibrary (void)
 {
+#ifdef LINK_TO_LIBJPEG
+	return true;
+#else
 	const char* dllnames [] =
 	{
 #if defined(WIN64)
@@ -490,6 +514,7 @@ qboolean JPEG_OpenLibrary (void)
 
 	// Load the DLL
 	return Sys_LoadLibrary (dllnames, &jpeg_dll, jpegfuncs);
+#endif
 }
 
 
@@ -502,8 +527,10 @@ Unload the JPEG DLL
 */
 void JPEG_CloseLibrary (void)
 {
+#ifndef LINK_TO_LIBJPEG
 	Sys_UnloadLibrary (&jpeg_dll);
 	jpeg_tried_loading = false; // allow retry
+#endif
 }
 
 
diff --git a/makefile b/makefile
index 1bf6a24b..4112001b 100644
--- a/makefile
+++ b/makefile
@@ -251,6 +251,14 @@ ifdef DP_PRELOAD_DEPENDENCIES
 endif
 endif
 
+ifdef DP_LINK_TO_LIBJPEG
+	LDFLAGS_LIBJPEG?=-ljpeg
+	LDFLAGS_CL+=$(LDFLAGS_LIBJPEG)
+	LDFLAGS_SV+=$(LDFLAGS_LIBJPEG)
+	LDFLAGS_SDL+=$(LDFLAGS_LIBJPEG)
+	CFLAGS_PRELOAD+=$(CFLAGS_LIBJPEG) -DLINK_TO_LIBJPEG
+endif
+
 ##### GNU Make specific definitions #####
 
 DO_LD=$(CC) -o $@ $^ $(LDFLAGS)
-- 
2.39.2