From 23916cae8ed3c18ae6b851365a25ccff6fcce7da Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 16 Jan 2013 15:01:10 -0800
Subject: [PATCH] mesa: Use an early return to unindent most of
 vbo_exec_Begin/End().

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---
 src/mesa/vbo/vbo_exec_api.c | 109 ++++++++++++++++++++++----------------------
 1 file changed, 54 insertions(+), 55 deletions(-)

diff --git a/src/mesa/vbo/vbo_exec_api.c b/src/mesa/vbo/vbo_exec_api.c
index 657c9aa..42eb953 100644
--- a/src/mesa/vbo/vbo_exec_api.c
+++ b/src/mesa/vbo/vbo_exec_api.c
@@ -789,54 +789,53 @@ vbo_exec_Rectf(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2)
 static void GLAPIENTRY vbo_exec_Begin( GLenum mode )
 {
    GET_CURRENT_CONTEXT( ctx ); 
+   struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
+   int i;
 
-   if (ctx->Driver.CurrentExecPrimitive == PRIM_OUTSIDE_BEGIN_END) {
-      struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
-      int i;
-
-      if (!_mesa_valid_prim_mode(ctx, mode, "glBegin")) {
-         return;
-      }
+   if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glBegin");
+      return;
+   }
 
-      vbo_draw_method(vbo_context(ctx), DRAW_BEGIN_END);
+   if (!_mesa_valid_prim_mode(ctx, mode, "glBegin")) {
+      return;
+   }
 
-      if (ctx->Driver.PrepareExecBegin)
-	 ctx->Driver.PrepareExecBegin(ctx);
+   vbo_draw_method(vbo_context(ctx), DRAW_BEGIN_END);
 
-      if (ctx->NewState) {
-	 _mesa_update_state( ctx );
+   if (ctx->Driver.PrepareExecBegin)
+      ctx->Driver.PrepareExecBegin(ctx);
 
-	 CALL_Begin(ctx->Exec, (mode));
-	 return;
-      }
+   if (ctx->NewState) {
+      _mesa_update_state( ctx );
 
-      if (!_mesa_valid_to_render(ctx, "glBegin")) {
-         return;
-      }
+      CALL_Begin(ctx->Exec, (mode));
+      return;
+   }
 
-      /* Heuristic: attempt to isolate attributes occuring outside
-       * begin/end pairs.
-       */
-      if (exec->vtx.vertex_size && !exec->vtx.attrsz[0]) 
-	 vbo_exec_FlushVertices_internal(exec, GL_FALSE);
-
-      i = exec->vtx.prim_count++;
-      exec->vtx.prim[i].mode = mode;
-      exec->vtx.prim[i].begin = 1;
-      exec->vtx.prim[i].end = 0;
-      exec->vtx.prim[i].indexed = 0;
-      exec->vtx.prim[i].weak = 0;
-      exec->vtx.prim[i].pad = 0;
-      exec->vtx.prim[i].start = exec->vtx.vert_count;
-      exec->vtx.prim[i].count = 0;
-      exec->vtx.prim[i].num_instances = 1;
-      exec->vtx.prim[i].base_instance = 0;
-
-      ctx->Driver.CurrentExecPrimitive = mode;
+   if (!_mesa_valid_to_render(ctx, "glBegin")) {
+      return;
    }
-   else 
-      _mesa_error( ctx, GL_INVALID_OPERATION, "glBegin" );
-      
+
+   /* Heuristic: attempt to isolate attributes occuring outside
+    * begin/end pairs.
+    */
+   if (exec->vtx.vertex_size && !exec->vtx.attrsz[0])
+      vbo_exec_FlushVertices_internal(exec, GL_FALSE);
+
+   i = exec->vtx.prim_count++;
+   exec->vtx.prim[i].mode = mode;
+   exec->vtx.prim[i].begin = 1;
+   exec->vtx.prim[i].end = 0;
+   exec->vtx.prim[i].indexed = 0;
+   exec->vtx.prim[i].weak = 0;
+   exec->vtx.prim[i].pad = 0;
+   exec->vtx.prim[i].start = exec->vtx.vert_count;
+   exec->vtx.prim[i].count = 0;
+   exec->vtx.prim[i].num_instances = 1;
+   exec->vtx.prim[i].base_instance = 0;
+
+   ctx->Driver.CurrentExecPrimitive = mode;
 }
 
 
@@ -846,26 +845,26 @@ static void GLAPIENTRY vbo_exec_Begin( GLenum mode )
 static void GLAPIENTRY vbo_exec_End( void )
 {
    GET_CURRENT_CONTEXT( ctx ); 
+   struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
 
-   if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) {
-      struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
+   if (ctx->Driver.CurrentExecPrimitive == PRIM_OUTSIDE_BEGIN_END) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glEnd");
+      return;
+   }
 
-      if (exec->vtx.prim_count > 0) {
-         /* close off current primitive */
-         int idx = exec->vtx.vert_count;
-         int i = exec->vtx.prim_count - 1;
+   if (exec->vtx.prim_count > 0) {
+      /* close off current primitive */
+      int idx = exec->vtx.vert_count;
+      int i = exec->vtx.prim_count - 1;
 
-         exec->vtx.prim[i].end = 1; 
-         exec->vtx.prim[i].count = idx - exec->vtx.prim[i].start;
-      }
+      exec->vtx.prim[i].end = 1;
+      exec->vtx.prim[i].count = idx - exec->vtx.prim[i].start;
+   }
 
-      ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
+   ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 
-      if (exec->vtx.prim_count == VBO_MAX_PRIM)
-	 vbo_exec_vtx_flush( exec, GL_FALSE );
-   }
-   else 
-      _mesa_error( ctx, GL_INVALID_OPERATION, "glEnd" );
+   if (exec->vtx.prim_count == VBO_MAX_PRIM)
+      vbo_exec_vtx_flush( exec, GL_FALSE );
 
    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
       _mesa_flush(ctx);
-- 
2.7.4