mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 21:32:20 +02:00
99 lines
2.9 KiB
Go
99 lines
2.9 KiB
Go
// Copyright 2013 Hajime Hoshi
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package opengl
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// #cgo LDFLAGS: -framework OpenGL
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//
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// #include <OpenGL/gl.h>
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// #include <stdlib.h>
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import "C"
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import (
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"github.com/hajimehoshi/go.ebiten/graphics"
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"github.com/hajimehoshi/go.ebiten/graphics/matrix"
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)
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type Device struct {
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screenScale int
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context *Context
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drawing chan chan func(graphics.Context)
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updating chan chan func()
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}
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func NewDevice(screenWidth, screenHeight, screenScale int, updating chan chan func()) *Device {
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context := newContext(screenWidth, screenHeight, screenScale)
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device := &Device{
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screenScale: screenScale,
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drawing: make(chan chan func(graphics.Context)),
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context: context,
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updating: updating,
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}
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go func() {
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for {
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ch := <-device.updating
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ch <- device.Update
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}
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}()
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return device
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}
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func (device *Device) Drawing() <-chan chan func(graphics.Context) {
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return device.drawing
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}
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func (device *Device) Update() {
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context := device.context
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C.glEnable(C.GL_TEXTURE_2D)
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MIN_FILTER, C.GL_NEAREST)
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_NEAREST)
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context.SetOffscreen(context.Screen().ID)
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context.Clear()
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ch := make(chan func(graphics.Context))
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device.drawing <- ch
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drawable := <-ch
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drawable(context)
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context.flush()
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MIN_FILTER, C.GL_LINEAR)
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_LINEAR)
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context.resetOffscreen()
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context.Clear()
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scale := float64(context.screenScale)
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geometryMatrix := matrix.Geometry{
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[2][3]float64{
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{scale, 0, 0},
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{0, scale, 0},
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},
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}
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context.DrawTexture(context.Screen().ID,
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geometryMatrix, matrix.IdentityColor())
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context.flush()
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}
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func (device *Device) TextureFactory() graphics.TextureFactory {
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return device.context
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}
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