Add 'ident' to shader driver - add shader context functions

gfx/shader/shader_cg.c

@@ -1012,5 +1012,6 @@ const shader_backend_t gl_cg_backend = {
    gl_cg_get_current_shader,
 
    RARCH_SHADER_CG,
+   "cg"
 };
 

gfx/shader/shader_context.c

@@ -1,5 +1,5 @@
 /*  RetroArch - A frontend for libretro.
- *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2014 - Daniel De Matteis
  * 
  *  RetroArch 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 Found-
@@ -15,3 +15,43 @@
 
 #include "shader_context.h"
 #include "../../retroarch_logger.h"
+#include <string.h>
+
+#ifdef HAVE_CONFIG_H
+#include "../../config.h"
+#endif
+
+static const shader_backend_t *shader_ctx_drivers[] = {
+#ifdef HAVE_CG
+   &gl_cg_backend,
+#endif
+#ifdef HAVE_GLSL
+   &gl_glsl_backend,
+#endif
+#ifdef HAVE_HLSL
+   &hlsl_backend,
+#endif
+   &shader_null_backend,
+   NULL
+};
+
+const shader_backend_t *shader_ctx_find_driver(const char *ident)
+{
+   unsigned i;
+   for (i = 0; shader_ctx_drivers[i]; i++)
+   {
+      if (strcmp(shader_ctx_drivers[i]->ident, ident) == 0)
+         return shader_ctx_drivers[i];
+   }
+
+   return NULL;
+}
+
+const shader_backend_t *shader_ctx_init_first(void)
+{
+   unsigned i;
+   for (i = 0; shader_ctx_drivers[i]; i++)
+      return shader_ctx_drivers[i];
+
+   return NULL;
+}

gfx/shader/shader_context.h

@@ -51,6 +51,9 @@ typedef struct shader_backend
    struct gfx_shader *(*get_current_shader)(void);
 
    enum rarch_shader_type type;
+
+   /* Human readable string. */
+   const char *ident;
 } shader_backend_t;
 
 extern const shader_backend_t gl_glsl_backend;
@@ -71,6 +74,7 @@ extern const shader_backend_t shader_null_backend;
 #endif
 
 #if defined(HAVE_CG) || defined(HAVE_HLSL) || defined(HAVE_GLSL)
+
 #ifndef HAVE_SHADER_MANAGER
 #define HAVE_SHADER_MANAGER
 #endif
@@ -81,4 +85,8 @@ extern const shader_backend_t shader_null_backend;
 
 #endif
 
+const shader_backend_t *shader_ctx_find_driver(const char *ident);
+
+const shader_backend_t *shader_ctx_init_first(void);
+
 #endif

gfx/shader/shader_glsl.c

@@ -1261,5 +1261,6 @@ const shader_backend_t gl_glsl_backend = {
    gl_glsl_get_current_shader,
 
    RARCH_SHADER_GLSL,
+   "glsl"
 };
 

gfx/shader/shader_hlsl.c

@@ -453,4 +453,5 @@ const shader_backend_t hlsl_backend = {
    hlsl_get_current_shader,
 
    RARCH_SHADER_HLSL,
+   "hlsl"
 };

gfx/shader/shader_null.c

@@ -119,4 +119,5 @@ const shader_backend_t shader_null_backend = {
    shader_null_get_current_shader,
 
    RARCH_SHADER_NONE,
+   "nullshader"
 };