chdir to exe path (#345)

* using OS_Basename to get root directory from argv[0]

* remove call to old GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS since opengl guarantees at least 16

src/harness/harness.c

@@ -174,15 +174,17 @@ void Harness_Init(int* argc, char* argv[]) {
     }
 
     char* root_dir = getenv("DETHRACE_ROOT_DIR");
-    if (root_dir == NULL) {
-        LOG_INFO("DETHRACE_ROOT_DIR is not set, assuming '.'");
+    if (root_dir != NULL) {
+        LOG_INFO("DETHRACE_ROOT_DIR is set to '%s'", root_dir);
     } else {
-        printf("Data directory: %s\n", root_dir);
-        result = chdir(root_dir);
-        if (result != 0) {
-            LOG_PANIC("Failed to chdir. Error is %s", strerror(errno));
-        }
+        root_dir = OS_Dirname(argv[0]);
+    }
+    printf("Using root directory: %s\n", root_dir);
+    result = chdir(root_dir);
+    if (result != 0) {
+        LOG_PANIC("Failed to chdir. Error is %s", strerror(errno));
     }
+
     if (harness_game_info.mode == eGame_none) {
         Harness_DetectGameMode();
     }

src/harness/include/harness/os.h

@@ -30,4 +30,8 @@ FILE* OS_fopen(const char* pathname, const char* mode);
 
 size_t OS_ConsoleReadPassword(char* pBuffer, size_t pBufferLen);
 
+char* OS_Dirname(const char* path);
+
+char* OS_Basename(const char* path);
+
 #endif

src/harness/os/linux.c

@@ -25,12 +25,14 @@
 #include <unistd.h>
 
 #define ARRAY_SIZE(A) (sizeof(A) / sizeof(A[0]))
+#define MAX_STACK_FRAMES 64
+#define TRACER_PID_STRING "TracerPid:"
 
 static int stack_nbr = 0;
 static char _program_name[1024];
-#define MAX_STACK_FRAMES 64
+
 static void* stack_traces[MAX_STACK_FRAMES];
-#define TRACER_PID_STRING "TracerPid:"
+static char name_buf[4096];
 
 struct dl_iterate_callback_data {
     int initialized;
@@ -176,7 +178,7 @@ static void signal_handler(int sig, siginfo_t* siginfo, void* context) {
 void resolve_full_path(char* path, const char* argv0) {
     if (argv0[0] == '/') { // run with absolute path
         strcpy(path, argv0);
-    } else { // run with relative path
+    } else {               // run with relative path
         if (NULL == getcwd(path, PATH_MAX)) {
             perror("getcwd error");
             return;
@@ -301,3 +303,13 @@ size_t OS_ConsoleReadPassword(char* pBuffer, size_t pBufferLen) {
     tcsetattr(STDIN_FILENO, TCSANOW, &old);
     return len;
 }
+
+char* OS_Dirname(const char* path) {
+    strcpy(name_buf, path);
+    return dirname(name_buf);
+}
+
+char* OS_Basename(const char* path) {
+    strcpy(name_buf, path);
+    return basename(name_buf);
+}

src/harness/os/macos.c

@@ -27,6 +27,7 @@ static int stack_nbr = 0;
 static char _program_name[1024];
 #define MAX_STACK_FRAMES 64
 static void* stack_traces[MAX_STACK_FRAMES];
+static char name_buf[4096];
 
 // Resolve symbol name and source location given the path to the executable and an address
 int addr2line(char const* const program_name, intptr_t slide, void const* const addr) {
@@ -228,3 +229,13 @@ size_t OS_ConsoleReadPassword(char* pBuffer, size_t pBufferLen) {
     fgets(pBuffer, pBufferLen, stdin);
     return strlen(pBuffer);
 }
+
+char* OS_Dirname(const char* path) {
+    strcpy(name_buf, path);
+    return dirname(name_buf);
+}
+
+char* OS_Basename(const char* path) {
+    strcpy(name_buf, path);
+    return basename(name_buf);
+}

src/harness/os/windows.c

@@ -29,6 +29,9 @@ void dr_dprintf(char* fmt_string, ...);
 static int stack_nbr = 0;
 static char _program_name[1024];
 
+static char dirname_buf[_MAX_DIR];
+static char fname_buf[_MAX_FNAME];
+
 int addr2line(char const* const program_name, void const* const addr) {
     char addr2line_cmd[512] = { 0 };
 
@@ -169,3 +172,13 @@ size_t OS_ConsoleReadPassword(char* pBuffer, size_t pBufferLen) {
     fgets(pBuffer, pBufferLen, stdin);
     return strlen(pBuffer);
 }
+
+char* OS_Dirname(const char* path) {
+    _splitpath(path, NULL, dirname_buf, NULL, NULL);
+    return dirname_buf;
+}
+
+char* OS_Basename(const char* path) {
+    _splitpath(path, NULL, NULL, fname_buf, NULL);
+    return fname_buf;
+}

src/harness/renderers/gl/gl_renderer.c

@@ -220,12 +220,6 @@ void GLRenderer_Init(int pRender_width, int pRender_height) {
     LOG_INFO("OpenGL version string: %s", glGetString(GL_VERSION));
     LOG_INFO("OpenGL shading language version string: %s", glGetString(GL_SHADING_LANGUAGE_VERSION));
 
-    int maxTextureImageUnits;
-    glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureImageUnits);
-    if (maxTextureImageUnits < 3) {
-        LOG_PANIC("GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS is %d. Need at least 3", maxTextureImageUnits);
-    }
-
     LoadShaders();
     SetupFullScreenRectGeometry();
 

src/harness/win95/polyfill.c

@@ -1,5 +1,6 @@
 
 #include "harness/hooks.h"
+#include "harness/os.h"
 #include "harness/win95_polyfill.h"
 
 #include <assert.h>
@@ -237,12 +238,11 @@ void DirectDrawDevice_SetPaletteEntries(PALETTEENTRY_* palette, int pFirst_colou
 }
 
 void _splitpath_(char* path, char* drive, char* dir, char* fname, char* ext) {
-#ifdef _WIN32
-    _splitpath(path, NULL, NULL, fname, NULL);
-#else
-    char* base = basename(path);
-    strcpy(fname, base);
-#endif
+    assert(dir == NULL);
+    assert(fname != NULL);
+
+    char* result = OS_Basename(path);
+    strcpy(fname, result);
 }
 
 int _CrtDbgReport_(int reportType, const char* filename, int linenumber, const char* moduleName, const char* format, ...) {