Mesa (master): mesa: simplify the _mesa_get_proxy_tex_image() function

[Brian Paul]

Module: Mesa
Branch: master
Commit: 80684649a6d01f0e0517b14f61cbcad6fa101929
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=80684649a6d01f0e0517b14f61cbcad6fa101929

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Jan 30 15:51:58 2009 -0700

mesa: simplify the _mesa_get_proxy_tex_image() function

---

 src/mesa/main/teximage.c |  115 ++++++++++++----------------------------------
 1 files changed, 30 insertions(+), 85 deletions(-)

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index a64e2c1..d119d22 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -1,8 +1,9 @@
 /*
  * mesa 3-D graphics library
- * Version:  7.1
+ * Version:  7.5
  *
  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -924,6 +925,7 @@ struct gl_texture_image *
 _mesa_get_proxy_tex_image(GLcontext *ctx, GLenum target, GLint level)
 {
    struct gl_texture_image *texImage;
+   GLuint texIndex;
 
    if (level < 0 )
       return NULL;
@@ -932,111 +934,54 @@ _mesa_get_proxy_tex_image(GLcontext *ctx, GLenum target, GLint level)
    case GL_PROXY_TEXTURE_1D:
       if (level >= ctx->Const.MaxTextureLevels)
          return NULL;
-      texImage = ctx->Texture.ProxyTex[TEXTURE_1D_INDEX]->Image[0][level];
-      if (!texImage) {
-         texImage = ctx->Driver.NewTextureImage(ctx);
-         if (!texImage) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
-            return NULL;
-         }
-         ctx->Texture.ProxyTex[TEXTURE_1D_INDEX]->Image[0][level] = texImage;
-         /* Set the 'back' pointer */
-         texImage->TexObject = ctx->Texture.ProxyTex[TEXTURE_1D_INDEX];
-      }
-      return texImage;
+      texIndex = TEXTURE_1D_INDEX;
+      break;
    case GL_PROXY_TEXTURE_2D:
       if (level >= ctx->Const.MaxTextureLevels)
          return NULL;
-      texImage = ctx->Texture.ProxyTex[TEXTURE_2D_INDEX]->Image[0][level];
-      if (!texImage) {
-         texImage = ctx->Driver.NewTextureImage(ctx);
-         if (!texImage) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
-            return NULL;
-         }
-         ctx->Texture.ProxyTex[TEXTURE_2D_INDEX]->Image[0][level] = texImage;
-         /* Set the 'back' pointer */
-         texImage->TexObject = ctx->Texture.ProxyTex[TEXTURE_2D_INDEX];
-      }
-      return texImage;
+      texIndex = TEXTURE_2D_INDEX;
+      break;
    case GL_PROXY_TEXTURE_3D:
       if (level >= ctx->Const.Max3DTextureLevels)
          return NULL;
-      texImage = ctx->Texture.ProxyTex[TEXTURE_3D_INDEX]->Image[0][level];
-      if (!texImage) {
-         texImage = ctx->Driver.NewTextureImage(ctx);
-         if (!texImage) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
-            return NULL;
-         }
-         ctx->Texture.ProxyTex[TEXTURE_3D_INDEX]->Image[0][level] = texImage;
-         /* Set the 'back' pointer */
-         texImage->TexObject = ctx->Texture.ProxyTex[TEXTURE_3D_INDEX];
-      }
-      return texImage;
+      texIndex = TEXTURE_3D_INDEX;
+      break;
    case GL_PROXY_TEXTURE_CUBE_MAP:
       if (level >= ctx->Const.MaxCubeTextureLevels)
          return NULL;
-      texImage = ctx->Texture.ProxyTex[TEXTURE_CUBE_INDEX]->Image[0][level];
-      if (!texImage) {
-         texImage = ctx->Driver.NewTextureImage(ctx);
-         if (!texImage) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
-            return NULL;
-         }
-         ctx->Texture.ProxyTex[TEXTURE_CUBE_INDEX]->Image[0][level] = texImage;
-         /* Set the 'back' pointer */
-         texImage->TexObject = ctx->Texture.ProxyTex[TEXTURE_CUBE_INDEX];
-      }
-      return texImage;
+      texIndex = TEXTURE_CUBE_INDEX;
+      break;
    case GL_PROXY_TEXTURE_RECTANGLE_NV:
       if (level > 0)
          return NULL;
-      texImage = ctx->Texture.ProxyTex[TEXTURE_RECT_INDEX]->Image[0][level];
-      if (!texImage) {
-         texImage = ctx->Driver.NewTextureImage(ctx);
-         if (!texImage) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
-            return NULL;
-         }
-         ctx->Texture.ProxyTex[TEXTURE_RECT_INDEX]->Image[0][level] = texImage;
-         /* Set the 'back' pointer */
-         texImage->TexObject = ctx->Texture.ProxyTex[TEXTURE_RECT_INDEX];
-      }
-      return texImage;
+      texIndex = TEXTURE_RECT_INDEX;
+      break;
    case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
       if (level >= ctx->Const.MaxTextureLevels)
          return NULL;
-      texImage = ctx->Texture.ProxyTex[TEXTURE_1D_ARRAY_INDEX]->Image[0][level];
-      if (!texImage) {
-         texImage = ctx->Driver.NewTextureImage(ctx);
-         if (!texImage) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
-            return NULL;
-         }
-         ctx->Texture.ProxyTex[TEXTURE_1D_ARRAY_INDEX]->Image[0][level] = texImage;
-         /* Set the 'back' pointer */
-         texImage->TexObject = ctx->Texture.ProxyTex[TEXTURE_1D_ARRAY_INDEX];
-      }
-      return texImage;
+      texIndex = TEXTURE_1D_ARRAY_INDEX;
+      break;
    case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
       if (level >= ctx->Const.MaxTextureLevels)
          return NULL;
-      texImage = ctx->Texture.ProxyTex[TEXTURE_2D_ARRAY_INDEX]->Image[0][level];
-      if (!texImage) {
-         texImage = ctx->Driver.NewTextureImage(ctx);
-         if (!texImage) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
-            return NULL;
-         }
-         ctx->Texture.ProxyTex[TEXTURE_2D_ARRAY_INDEX]->Image[0][level] = texImage;
-         /* Set the 'back' pointer */
-         texImage->TexObject = ctx->Texture.ProxyTex[TEXTURE_2D_ARRAY_INDEX];
-      }
-      return texImage;
+      texIndex = TEXTURE_2D_ARRAY_INDEX;
+      break;
    default:
       return NULL;
    }
+
+   texImage = ctx->Texture.ProxyTex[texIndex]->Image[0][level];
+   if (!texImage) {
+      texImage = ctx->Driver.NewTextureImage(ctx);
+      if (!texImage) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
+         return NULL;
+      }
+      ctx->Texture.ProxyTex[texIndex]->Image[0][level] = texImage;
+      /* Set the 'back' pointer */
+      texImage->TexObject = ctx->Texture.ProxyTex[texIndex];
+   }
+   return texImage;
 }