do not list empty shader dir

include/ishaders.h

@@ -111,6 +111,9 @@ typedef void ( WINAPI * PFN_RELOADSHADERS )();
 // load all shaders in a given directory
 // this will scan the list of in-memory shaders, and load the related qtexture_t if needed
 typedef int ( WINAPI * PFN_LOADSHADERSFROMDIR )( const char* path );
+// count all shaders in a given directory
+// this will scan the list of in-memory shaders
+typedef bool ( WINAPI * PFN_ISDIRCONTAININGSHADER )( const char* path );
 // load a shader file (ie a set of shaders)
 // after LoadShaderFile shaders will be in memory, next step is to load the qtexture_t Radiant uses to represent them
 // if a shader with the same name exists, new one will not be loaded - don't use this to refresh the shaders!
@@ -178,6 +181,7 @@ struct _QERShadersTable
 	PFN_FREESHADERS m_pfnFreeShaders;
 	PFN_RELOADSHADERS m_pfnReloadShaders;
 	PFN_LOADSHADERSFROMDIR m_pfnLoadShadersFromDir;
+	PFN_ISDIRCONTAININGSHADER m_pfnIsDirContainingShaders;
 	PFN_LOADSHADERFILE m_pfnLoadShaderFile;
 	PFN_RELOADSHADERFILE m_pfnReloadShaderFile;
 	PFN_HASSHADER m_pfnHasShader;
@@ -219,7 +223,7 @@ struct _QERShadersTable
 #define QERApp_ColorShader_ForName __SHADERSTABLENAME.m_pfnColorShader_ForName
 #define QERApp_Shader_ForName_NoLoad __SHADERSTABLENAME.m_pfnShader_ForName_NoLoad
 #define QERApp_LoadShadersFromDir __SHADERSTABLENAME.m_pfnLoadShadersFromDir
-#define QERApp_LoadShadersFromDir __SHADERSTABLENAME.m_pfnLoadShadersFromDir
+#define QERApp_IsDirContainingShaders __SHADERSTABLENAME.m_pfnIsDirContainingShaders
 #define QERApp_CreateShader_ForTextureName __SHADERSTABLENAME.m_pfnCreateShader_ForTextureName
 #define QERApp_GetActiveShaderCount __SHADERSTABLENAME.m_pfnGetActiveShaderCount
 #define QERApp_ActiveShaders_SetDisplayed __SHADERSTABLENAME.m_pfnActiveShaders_SetDisplayed

plugins/shaders/shaders.cpp

@@ -410,6 +410,16 @@ int WINAPI QERApp_LoadShadersFromDir( const char *path ){
 	for ( int i = 0; i < nSize; i++ )
 	{
 		CShader *pShader = reinterpret_cast < CShader * >( g_Shaders[i] );
+
+		// does not uselessly load shader with path not starting with "textures/"
+		// they will not be displayed by texture browser, because they can't be
+		// applied to a surface
+		if ( !g_str_has_prefix( pShader->getName(), "textures/" ) ) {
+			continue;
+		}
+
+		// this is basically doing:
+		// if path in ["scripts/eerie.shader", "textures/eerie/blackness"]
 		if ( strstr( pShader->getShaderFileName(), path ) || strstr( pShader->getName(), path ) ) {
 			count++;
 			// request the shader, this will load the texture if needed and set "inuse"
@@ -430,6 +440,25 @@ int WINAPI QERApp_LoadShadersFromDir( const char *path ){
 	return count;
 }
 
+bool WINAPI QERApp_IsDirContainingShaders( const char *path ){
+	int nSize = g_Shaders.GetSize();
+	// exclude shaders that are not starting with "textures/"
+	// they will not be displayed and are not applicable to surfaces
+	// exclude shaders from other paths,
+	// they are not the ones we are looking for
+	gchar* prefix = g_strconcat("textures/", path, NULL);
+	for ( int i = 0; i < nSize; i++ )
+	{
+		CShader *pShader = reinterpret_cast < CShader * >( g_Shaders[i] );
+		if ( g_str_has_prefix( pShader->getName(), prefix ) ) {
+			g_free(prefix);
+			return true;
+		}
+	}
+	g_free(prefix);
+	return false;
+}
+
 bool CShader::Parse(){
 	char *token = g_ScripLibTable.m_pfnToken();
 
@@ -924,6 +953,7 @@ bool CSynapseClientShaders::RequestAPI( APIDescriptor_t *pAPI ){
 		pTable->m_pfnFreeShaders = QERApp_FreeShaders;
 		pTable->m_pfnReloadShaders = QERApp_ReloadShaders;
 		pTable->m_pfnLoadShadersFromDir = QERApp_LoadShadersFromDir;
+		pTable->m_pfnIsDirContainingShaders = QERApp_IsDirContainingShaders;
 		pTable->m_pfnReloadShaderFile = QERApp_ReloadShaderFile;
 		pTable->m_pfnLoadShaderFile = QERApp_LoadShaderFile;
 		pTable->m_pfnHasShader = QERApp_HasShader;

radiant/texwindow.cpp

@@ -591,8 +591,11 @@ void FillTextureList( GSList** pArray )
 			}
 
 		if ( !found ) {
+			if( QERApp_IsDirContainingShaders( shaderfile ) )
+			{
 				texdirs = g_slist_prepend( texdirs, g_strdup( shaderfile ) );
 			}
+		}
 
 		free( l_shaderfiles->data );
 		l_shaderfiles = g_slist_remove( l_shaderfiles, l_shaderfiles->data );
@@ -784,6 +787,7 @@ void Texture_ShowDirectory_by_path( const char* pPath )
    ( the GL textures are not flushed though)
    ==============
  */
+
 void Texture_ShowDirectory(){
 	char name[1024];
 	char dirstring[1024];