ebiten/internal/opengl/driver.go
2018-11-07 01:43:07 +09:00

85 lines
2.2 KiB
Go

// 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 (
"github.com/hajimehoshi/ebiten/internal/affine"
"github.com/hajimehoshi/ebiten/internal/graphics"
"github.com/hajimehoshi/ebiten/internal/math"
)
var theDriver Driver
func GetDriver() *Driver {
return &theDriver
}
type Driver struct {
}
func (d *Driver) NewImage(width, height int) (*Image, error) {
i := &Image{
width: width,
height: height,
}
w := math.NextPowerOf2Int(width)
h := math.NextPowerOf2Int(height)
checkSize(w, h)
t, err := theContext.newTexture(w, h)
if err != nil {
return nil, err
}
i.textureNative = t
return i, nil
}
func (d *Driver) NewScreenFramebufferImage(width, height int) *Image {
checkSize(width, height)
i := &Image{
width: width,
height: height,
}
// The (default) framebuffer size can't be converted to a power of 2.
// On browsers, c.width and c.height are used as viewport size and
// Edge can't treat a bigger viewport than the drawing area (#71).
i.framebuffer = newScreenFramebuffer(width, height)
return i
}
// Reset resets or initializes the current OpenGL state.
func (d *Driver) Reset() error {
return theOpenGLState.reset()
}
func (d *Driver) BufferSubData(vertices []float32, indices []uint16) {
bufferSubData(vertices, indices)
}
func (d *Driver) UseProgram(mode graphics.CompositeMode, colorM *affine.ColorM, filter graphics.Filter) error {
return useProgram(mode, colorM, filter)
}
func (d *Driver) DrawElements(len int, offsetInBytes int) {
theContext.drawElements(len, offsetInBytes)
}
func (d *Driver) Flush() {
theContext.flush()
}
func (d *Driver) MaxTextureSize() int {
return theContext.getMaxTextureSize()
}