From 02ec7830d9b65d227b5fd49c602c9029d149fe1a Mon Sep 17 00:00:00 2001
From: twinaphex <libretro@gmail.com>
Date: Sun, 14 Feb 2016 19:30:48 +0100
Subject: [PATCH] Create SHADER_CTL_INFO

---
 gfx/drivers/gl.c          | 18 +++++++++++++-----
 gfx/video_shader_driver.c | 18 +++++++++++-------
 gfx/video_shader_driver.h | 10 +++++++---
 3 files changed, 31 insertions(+), 15 deletions(-)

diff --git a/gfx/drivers/gl.c b/gfx/drivers/gl.c
index f6b34d11b5..6493bfef81 100644
--- a/gfx/drivers/gl.c
+++ b/gfx/drivers/gl.c
@@ -657,9 +657,13 @@ static void gl_init_fbo(gl_t *gl, unsigned fbo_width, unsigned fbo_height)
    int i;
    unsigned width, height;
    video_shader_ctx_scale_t scaler;
+   video_shader_ctx_info_t shader_info;
    struct gfx_fbo_scale scale, scale_last;
 
-   if (!gl || video_shader_driver_num_shaders() == 0)
+   if (!video_shader_driver_ctl(SHADER_CTL_INFO, &shader_info))
+      return;
+
+   if (!gl || shader_info.num == 0)
       return;
 
    video_driver_get_size(&width, &height);
@@ -669,13 +673,13 @@ static void gl_init_fbo(gl_t *gl, unsigned fbo_width, unsigned fbo_height)
 
    video_shader_driver_ctl(SHADER_CTL_SCALE, &scaler);
 
-   scaler.idx   = video_shader_driver_num_shaders();
+   scaler.idx   = shader_info.num;
    scaler.scale = &scale_last;
 
    video_shader_driver_ctl(SHADER_CTL_SCALE, &scaler);
 
    /* we always want FBO to be at least initialized on startup for consoles */
-   if (video_shader_driver_num_shaders() == 1 && !scale.valid)
+   if (shader_info.num == 1 && !scale.valid)
       return;
 
    if (!gl_check_fbo_proc(gl))
@@ -684,7 +688,7 @@ static void gl_init_fbo(gl_t *gl, unsigned fbo_width, unsigned fbo_height)
       return;
    }
 
-   gl->fbo_pass = video_shader_driver_num_shaders() - 1;
+   gl->fbo_pass = shader_info.num - 1;
    if (scale_last.valid)
       gl->fbo_pass++;
 
@@ -2598,6 +2602,7 @@ static void *gl_init(const video_info_t *video, const input_driver_t **input, vo
    gfx_ctx_mode_t mode;
    gfx_ctx_input_t inp;
    unsigned interval, mip_level;
+   video_shader_ctx_info_t shader_info;
    unsigned win_width, win_height, temp_width = 0, temp_height = 0;
    bool force_smooth                  = false;
    const char *vendor                 = NULL;
@@ -2750,9 +2755,12 @@ static void *gl_init(const video_info_t *video, const input_driver_t **input, vo
       gl->textures     = max(minimum + 1, gl->textures);
    }
 
+   if (!video_shader_driver_ctl(SHADER_CTL_INFO, &shader_info))
+      goto error;
+
    RARCH_LOG("[GL]: Using %u textures.\n", gl->textures);
    RARCH_LOG("[GL]: Loaded %u program(s).\n",
-         video_shader_driver_num_shaders());
+         shader_info.num);
 
    gl->tex_w = gl->tex_h = (RARCH_SCALE_BASE * video->input_scale);
    gl->keep_aspect     = video->force_aspect;
diff --git a/gfx/video_shader_driver.c b/gfx/video_shader_driver.c
index 292c6940a4..01c9a030dc 100644
--- a/gfx/video_shader_driver.c
+++ b/gfx/video_shader_driver.c
@@ -83,13 +83,6 @@ const char *video_shader_driver_get_ident(void)
    return current_shader->ident;
 }
 
-unsigned video_shader_driver_num_shaders(void)
-{
-   if (!current_shader)
-      return 0;
-   return current_shader->num_shaders(shader_data);
-}
-
 unsigned video_shader_driver_get_prev_textures(void)
 {
    if (!current_shader)
@@ -225,6 +218,17 @@ bool video_shader_driver_ctl(enum video_shader_driver_ctl_state state, void *dat
             current_shader->shader_scale(shader_data, scaler->idx, scaler->scale);
          }
          break;
+      case SHADER_CTL_INFO:
+         {
+            video_shader_ctx_info_t *shader_info = (video_shader_ctx_info_t*)data;
+            if (!shader_info || !current_shader)
+               return false;
+
+            shader_info->num = 0;
+            if (current_shader->num_shaders)
+               shader_info->num = current_shader->num_shaders(shader_data);
+         }
+         break;
       case SHADER_CTL_NONE:
       default:
          break;
diff --git a/gfx/video_shader_driver.h b/gfx/video_shader_driver.h
index 3b1f02524e..ecd76a59c9 100644
--- a/gfx/video_shader_driver.h
+++ b/gfx/video_shader_driver.h
@@ -64,7 +64,8 @@ enum video_shader_driver_ctl_state
    SHADER_CTL_GET_FEEDBACK_PASS,
    SHADER_CTL_MIPMAP_INPUT,
    SHADER_CTL_SET_COORDS,
-   SHADER_CTL_SCALE
+   SHADER_CTL_SCALE,
+   SHADER_CTL_INFO
 };
 
 typedef struct shader_backend
@@ -139,6 +140,11 @@ typedef struct video_shader_ctx_scale
    struct gfx_fbo_scale *scale;
 } video_shader_ctx_scale_t;
 
+typedef struct video_shader_ctx_info
+{
+   unsigned num;
+} video_shader_ctx_info_t;
+
 extern const shader_backend_t gl_glsl_backend;
 extern const shader_backend_t hlsl_backend;
 extern const shader_backend_t gl_cg_backend;
@@ -160,8 +166,6 @@ void video_shader_driver_use(void *data, unsigned index);
 
 const char *video_shader_driver_get_ident(void);
 
-unsigned video_shader_driver_num_shaders(void);
-
 bool video_shader_driver_set_mvp(void *data, const math_matrix_4x4 *mat);
 
 unsigned video_shader_driver_get_prev_textures(void);