+/**
+ * Wrapper around _mesa_lookup_texture that throws GL_INVALID_OPERATION if id
+ * is not in the hash table. After calling _mesa_error, it returns NULL.
+ */
+struct gl_texture_object *
+_mesa_lookup_texture_err(struct gl_context *ctx, GLuint id, const char* func)
+{
+ struct gl_texture_object *texObj;
+
+ texObj = _mesa_lookup_texture(ctx, id); /* Returns NULL if not found. */
+
+ if (!texObj)
+ _mesa_error(ctx, GL_INVALID_OPERATION, "%s(texture)", func);
+
+ return texObj;
+}
+
+void
+_mesa_begin_texture_lookups(struct gl_context *ctx)
+{
+ _mesa_HashLockMutex(ctx->Shared->TexObjects);
+}
+
+
+void
+_mesa_end_texture_lookups(struct gl_context *ctx)
+{
+ _mesa_HashUnlockMutex(ctx->Shared->TexObjects);
+}
+
+
+struct gl_texture_object *
+_mesa_lookup_texture_locked(struct gl_context *ctx, GLuint id)
+{
+ return (struct gl_texture_object *)
+ _mesa_HashLookupLocked(ctx->Shared->TexObjects, id);
+}
+
+/**
+ * Return a pointer to the current texture object for the given target
+ * on the current texture unit.
+ * Note: all <target> error checking should have been done by this point.
+ */
+struct gl_texture_object *
+_mesa_get_current_tex_object(struct gl_context *ctx, GLenum target)
+{
+ struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
+ const GLboolean arrayTex = ctx->Extensions.EXT_texture_array;
+
+ switch (target) {
+ case GL_TEXTURE_1D:
+ return texUnit->CurrentTex[TEXTURE_1D_INDEX];
+ case GL_PROXY_TEXTURE_1D:
+ return ctx->Texture.ProxyTex[TEXTURE_1D_INDEX];
+ case GL_TEXTURE_2D:
+ return texUnit->CurrentTex[TEXTURE_2D_INDEX];
+ case GL_PROXY_TEXTURE_2D:
+ return ctx->Texture.ProxyTex[TEXTURE_2D_INDEX];
+ case GL_TEXTURE_3D:
+ return texUnit->CurrentTex[TEXTURE_3D_INDEX];
+ case GL_PROXY_TEXTURE_3D:
+ return ctx->Texture.ProxyTex[TEXTURE_3D_INDEX];
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+ case GL_TEXTURE_CUBE_MAP:
+ return ctx->Extensions.ARB_texture_cube_map
+ ? texUnit->CurrentTex[TEXTURE_CUBE_INDEX] : NULL;
+ case GL_PROXY_TEXTURE_CUBE_MAP:
+ return ctx->Extensions.ARB_texture_cube_map
+ ? ctx->Texture.ProxyTex[TEXTURE_CUBE_INDEX] : NULL;
+ case GL_TEXTURE_CUBE_MAP_ARRAY:
+ return ctx->Extensions.ARB_texture_cube_map_array
+ ? texUnit->CurrentTex[TEXTURE_CUBE_ARRAY_INDEX] : NULL;
+ case GL_PROXY_TEXTURE_CUBE_MAP_ARRAY:
+ return ctx->Extensions.ARB_texture_cube_map_array
+ ? ctx->Texture.ProxyTex[TEXTURE_CUBE_ARRAY_INDEX] : NULL;
+ case GL_TEXTURE_RECTANGLE_NV:
+ return ctx->Extensions.NV_texture_rectangle
+ ? texUnit->CurrentTex[TEXTURE_RECT_INDEX] : NULL;
+ case GL_PROXY_TEXTURE_RECTANGLE_NV:
+ return ctx->Extensions.NV_texture_rectangle
+ ? ctx->Texture.ProxyTex[TEXTURE_RECT_INDEX] : NULL;
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ return arrayTex ? texUnit->CurrentTex[TEXTURE_1D_ARRAY_INDEX] : NULL;
+ case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
+ return arrayTex ? ctx->Texture.ProxyTex[TEXTURE_1D_ARRAY_INDEX] : NULL;
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ return arrayTex ? texUnit->CurrentTex[TEXTURE_2D_ARRAY_INDEX] : NULL;
+ case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
+ return arrayTex ? ctx->Texture.ProxyTex[TEXTURE_2D_ARRAY_INDEX] : NULL;
+ case GL_TEXTURE_BUFFER:
+ return ctx->API == API_OPENGL_CORE &&
+ ctx->Extensions.ARB_texture_buffer_object ?
+ texUnit->CurrentTex[TEXTURE_BUFFER_INDEX] : NULL;
+ case GL_TEXTURE_EXTERNAL_OES:
+ return _mesa_is_gles(ctx) && ctx->Extensions.OES_EGL_image_external
+ ? texUnit->CurrentTex[TEXTURE_EXTERNAL_INDEX] : NULL;
+ case GL_TEXTURE_2D_MULTISAMPLE:
+ return ctx->Extensions.ARB_texture_multisample
+ ? texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_INDEX] : NULL;
+ case GL_PROXY_TEXTURE_2D_MULTISAMPLE:
+ return ctx->Extensions.ARB_texture_multisample
+ ? ctx->Texture.ProxyTex[TEXTURE_2D_MULTISAMPLE_INDEX] : NULL;
+ case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
+ return ctx->Extensions.ARB_texture_multisample
+ ? texUnit->CurrentTex[TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX] : NULL;
+ case GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY:
+ return ctx->Extensions.ARB_texture_multisample
+ ? ctx->Texture.ProxyTex[TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX] : NULL;
+ default:
+ _mesa_problem(NULL, "bad target in _mesa_get_current_tex_object()");
+ return NULL;
+ }
+}