/
framebuffer.go
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/
framebuffer.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
// framebuffer is a wrapper of OpenGL's framebuffer.
type framebuffer struct {
graphics *Graphics
native framebufferNative
width int
height int
}
// newFramebufferFromTexture creates a framebuffer from the given texture.
func newFramebufferFromTexture(context *context, texture textureNative, width, height int) (*framebuffer, error) {
native, err := context.newFramebuffer(texture)
if err != nil {
return nil, err
}
return &framebuffer{
native: native,
width: width,
height: height,
}, nil
}
// newScreenFramebuffer creates a framebuffer for the screen.
func newScreenFramebuffer(context *context, width, height int) *framebuffer {
return &framebuffer{
native: context.getScreenFramebuffer(),
width: width,
height: height,
}
}
func (f *framebuffer) delete(context *context) {
if !f.native.equal(context.getScreenFramebuffer()) {
context.deleteFramebuffer(f.native)
}
}