mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 03:38:55 +01:00
ea35296be7
Using FilterNearest rather than filterScreen or FilterLinear speeds up a Dell E6500 from 23fps->36fps and 27fps->48fps. Updates #1772
124 lines
3.4 KiB
Go
124 lines
3.4 KiB
Go
// 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 ebiten
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
|
|
)
|
|
|
|
type gameForUI struct {
|
|
game Game
|
|
offscreen *Image
|
|
screen *Image
|
|
}
|
|
|
|
func newGameForUI(game Game) *gameForUI {
|
|
return &gameForUI{
|
|
game: game,
|
|
}
|
|
}
|
|
|
|
func (c *gameForUI) Layout(outsideWidth, outsideHeight float64, deviceScaleFactor float64) (int, int) {
|
|
ow, oh := c.game.Layout(int(outsideWidth), int(outsideHeight))
|
|
if ow <= 0 || oh <= 0 {
|
|
panic("ebiten: Layout must return positive numbers")
|
|
}
|
|
|
|
sw, sh := int(outsideWidth*deviceScaleFactor), int(outsideHeight*deviceScaleFactor)
|
|
if c.screen != nil {
|
|
if w, h := c.screen.Size(); w != sw || h != sh {
|
|
c.screen.Dispose()
|
|
c.screen = nil
|
|
}
|
|
}
|
|
if c.screen == nil {
|
|
c.screen = newScreenFramebufferImage(sw, sh)
|
|
}
|
|
|
|
if c.offscreen != nil {
|
|
if w, h := c.offscreen.Size(); w != ow || h != oh {
|
|
c.offscreen.Dispose()
|
|
c.offscreen = nil
|
|
}
|
|
}
|
|
if c.offscreen == nil {
|
|
c.offscreen = NewImage(ow, oh)
|
|
|
|
// Keep the offscreen an independent image from an atlas (#1938).
|
|
// The shader program for the screen is special and doesn't work well with an image on an atlas.
|
|
// An image on an atlas is surrounded by a transparent edge,
|
|
// and the shader program unexpectedly picks the pixel on the edges.
|
|
c.offscreen.mipmap.SetIndependent(true)
|
|
}
|
|
|
|
return ow, oh
|
|
}
|
|
|
|
func (c *gameForUI) Update() error {
|
|
return c.game.Update()
|
|
}
|
|
|
|
func (c *gameForUI) Draw(screenScale float64, offsetX, offsetY float64, needsClearingScreen bool, framebufferYDirection graphicsdriver.YDirection, clearScreenEveryFrame, filterEnabled bool) error {
|
|
c.offscreen.mipmap.SetVolatile(clearScreenEveryFrame)
|
|
|
|
// Even though updateCount == 0, the offscreen is cleared and Draw is called.
|
|
// Draw should not update the game state and then the screen should not be updated without Update, but
|
|
// users might want to process something at Draw with the time intervals of FPS.
|
|
if clearScreenEveryFrame {
|
|
c.offscreen.Clear()
|
|
}
|
|
c.game.Draw(c.offscreen)
|
|
|
|
if needsClearingScreen {
|
|
// This clear is needed for fullscreen mode or some mobile platforms (#622).
|
|
c.screen.Clear()
|
|
}
|
|
|
|
op := &DrawImageOptions{}
|
|
|
|
s := screenScale
|
|
switch framebufferYDirection {
|
|
case graphicsdriver.Upward:
|
|
op.GeoM.Scale(s, -s)
|
|
_, h := c.offscreen.Size()
|
|
op.GeoM.Translate(0, float64(h)*s)
|
|
case graphicsdriver.Downward:
|
|
op.GeoM.Scale(s, s)
|
|
default:
|
|
panic(fmt.Sprintf("ebiten: invalid v-direction: %d", framebufferYDirection))
|
|
}
|
|
|
|
op.GeoM.Translate(offsetX, offsetY)
|
|
op.CompositeMode = CompositeModeCopy
|
|
|
|
switch {
|
|
case !filterEnabled:
|
|
op.Filter = FilterNearest
|
|
case math.Floor(s) == s:
|
|
op.Filter = FilterNearest
|
|
case s > 1:
|
|
op.Filter = filterScreen
|
|
default:
|
|
// filterScreen works with >=1 scale, but does not well with <1 scale.
|
|
// Use regular FilterLinear instead so far (#669).
|
|
op.Filter = FilterLinear
|
|
}
|
|
c.screen.DrawImage(c.offscreen, op)
|
|
return nil
|
|
}
|