ebiten/internal/graphicsdriver/opengl/locationcache.go

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// Copyright 2014 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package opengl
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type locationCache struct {
uniformLocationCache map[program]map[string]uniformLocation
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}
func newLocationCache() *locationCache {
return &locationCache{
uniformLocationCache: map[program]map[string]uniformLocation{},
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}
}
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func (c *locationCache) GetUniformLocation(context *context, p program, location string) uniformLocation {
if _, ok := c.uniformLocationCache[p]; !ok {
c.uniformLocationCache[p] = map[string]uniformLocation{}
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}
l, ok := c.uniformLocationCache[p][location]
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if !ok {
l = uniformLocation(context.ctx.GetUniformLocation(uint32(p), location))
c.uniformLocationCache[p][location] = l
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}
return l
}
func (c *locationCache) deleteProgram(p program) {
delete(c.uniformLocationCache, p)
}