framebuffer.go (1517B)
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 // framebuffer is a wrapper of OpenGL's framebuffer. 18 type framebuffer struct { 19 graphics *Graphics 20 native framebufferNative 21 width int 22 height int 23 } 24 25 // newFramebufferFromTexture creates a framebuffer from the given texture. 26 func newFramebufferFromTexture(context *context, texture textureNative, width, height int) (*framebuffer, error) { 27 native, err := context.newFramebuffer(texture) 28 if err != nil { 29 return nil, err 30 } 31 return &framebuffer{ 32 native: native, 33 width: width, 34 height: height, 35 }, nil 36 } 37 38 // newScreenFramebuffer creates a framebuffer for the screen. 39 func newScreenFramebuffer(context *context, width, height int) *framebuffer { 40 return &framebuffer{ 41 native: context.getScreenFramebuffer(), 42 width: width, 43 height: height, 44 } 45 } 46 47 func (f *framebuffer) delete(context *context) { 48 if !f.native.equal(context.getScreenFramebuffer()) { 49 context.deleteFramebuffer(f.native) 50 } 51 }