ebiten/internal/graphicsdriver/opengl/driver.go

124 lines
3.3 KiB
Go
Raw Normal View History

2018-11-05 19:56:04 +01:00
// Copyright 2018 The Ebiten Authors
//
// 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
import (
"fmt"
2018-11-05 19:56:04 +01:00
"github.com/hajimehoshi/ebiten/internal/affine"
"github.com/hajimehoshi/ebiten/internal/driver"
2018-11-05 19:56:04 +01:00
"github.com/hajimehoshi/ebiten/internal/graphics"
)
var theDriver Driver
func Get() *Driver {
2018-11-05 19:56:04 +01:00
return &theDriver
}
type Driver struct {
state openGLState
context context
}
2018-11-12 16:00:10 +01:00
func (d *Driver) SetWindow(window uintptr) {
// Do nothing.
}
func (d *Driver) checkSize(width, height int) {
if width < 1 {
panic(fmt.Sprintf("opengl: width (%d) must be equal or more than %d", width, 1))
}
if height < 1 {
panic(fmt.Sprintf("opengl: height (%d) must be equal or more than %d", height, 1))
}
m := d.context.getMaxTextureSize()
if width > m {
panic(fmt.Sprintf("opengl: width (%d) must be less than or equal to %d", width, m))
}
if height > m {
panic(fmt.Sprintf("opengl: height (%d) must be less than or equal to %d", height, m))
}
2018-11-05 19:56:04 +01:00
}
func (d *Driver) NewImage(width, height int) (driver.Image, error) {
2018-11-05 19:56:04 +01:00
i := &Image{
driver: d,
2018-11-05 19:56:04 +01:00
width: width,
height: height,
}
w := graphics.InternalImageSize(width)
h := graphics.InternalImageSize(height)
d.checkSize(w, h)
t, err := d.context.newTexture(w, h)
2018-11-05 19:56:04 +01:00
if err != nil {
return nil, err
}
i.textureNative = t
return i, nil
}
func (d *Driver) NewScreenFramebufferImage(width, height int) (driver.Image, error) {
d.checkSize(width, height)
2018-11-05 19:56:04 +01:00
i := &Image{
driver: d,
2018-11-05 19:56:04 +01:00
width: width,
height: height,
screen: true,
2018-11-05 19:56:04 +01:00
}
2018-11-11 15:57:23 +01:00
return i, nil
2018-11-05 19:56:04 +01:00
}
// Reset resets or initializes the current OpenGL state.
func (d *Driver) Reset() error {
return d.state.reset(&d.context)
2018-11-05 19:56:04 +01:00
}
func (d *Driver) SetVertices(vertices []float32, indices []uint16) {
// Note that the vertices passed to BufferSubData is not under GC management
// in opengl package due to unsafe-way.
// See BufferSubData in context_mobile.go.
2018-11-11 14:08:36 +01:00
d.context.arrayBufferSubData(vertices)
d.context.elementArrayBufferSubData(indices)
2018-11-05 19:56:04 +01:00
}
func (d *Driver) Draw(indexLen int, indexOffset int, mode graphics.CompositeMode, colorM *affine.ColorM, filter graphics.Filter, address graphics.Address) error {
if err := d.useProgram(mode, colorM, filter, address); err != nil {
return err
}
d.context.drawElements(indexLen, indexOffset*2) // 2 is uint16 size in bytes
// glFlush() might be necessary at least on MacBook Pro (a smilar problem at #419),
// but basically this pass the tests (esp. TestImageTooManyFill).
// As glFlush() causes performance problems, this should be avoided as much as possible.
// Let's wait and see, and file a new issue when this problem is newly found.
return nil
2018-11-05 19:56:04 +01:00
}
func (d *Driver) Flush() {
d.context.flush()
2018-11-05 19:56:04 +01:00
}
2018-11-12 16:00:10 +01:00
func (d *Driver) SetVsyncEnabled(enabled bool) {
// Do nothing
}
func (d *Driver) VDirection() driver.VDirection {
return driver.VDownward
2018-11-12 16:00:10 +01:00
}
func (d *Driver) IsGL() bool {
return true
}