locationcache.go (1332B)
1 // Copyright 2014 Hajime Hoshi 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package opengl 16 17 // Since js.Object (Program) can't be keys of a map, use integers (programID) instead. 18 19 type locationCache struct { 20 uniformLocationCache map[programID]map[string]uniformLocation 21 } 22 23 func newLocationCache() *locationCache { 24 return &locationCache{ 25 uniformLocationCache: map[programID]map[string]uniformLocation{}, 26 } 27 } 28 29 func (c *locationCache) GetUniformLocation(context *context, p program, location string) uniformLocation { 30 id := getProgramID(p) 31 if _, ok := c.uniformLocationCache[id]; !ok { 32 c.uniformLocationCache[id] = map[string]uniformLocation{} 33 } 34 l, ok := c.uniformLocationCache[id][location] 35 if !ok { 36 l = context.getUniformLocationImpl(p, location) 37 c.uniformLocationCache[id][location] = l 38 } 39 return l 40 }