mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 20:28:54 +01:00
140 lines
3.4 KiB
Go
140 lines
3.4 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 (
|
|
"errors"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
|
|
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
|
|
)
|
|
|
|
type Image struct {
|
|
id graphicsdriver.ImageID
|
|
graphics *Graphics
|
|
texture textureNative
|
|
stencil renderbufferNative
|
|
framebuffer *framebuffer
|
|
width int
|
|
height int
|
|
screen bool
|
|
}
|
|
|
|
func (i *Image) ID() graphicsdriver.ImageID {
|
|
return i.id
|
|
}
|
|
|
|
func (i *Image) IsInvalidated() bool {
|
|
return !i.graphics.context.isTexture(i.texture)
|
|
}
|
|
|
|
func (i *Image) Dispose() {
|
|
if i.framebuffer != nil {
|
|
i.framebuffer.delete(&i.graphics.context)
|
|
}
|
|
if !i.texture.equal(*new(textureNative)) {
|
|
i.graphics.context.deleteTexture(i.texture)
|
|
}
|
|
if !i.stencil.equal(*new(renderbufferNative)) {
|
|
i.graphics.context.deleteRenderbuffer(i.stencil)
|
|
}
|
|
|
|
i.graphics.removeImage(i)
|
|
}
|
|
|
|
func (i *Image) setViewport() error {
|
|
if err := i.ensureFramebuffer(); err != nil {
|
|
return err
|
|
}
|
|
i.graphics.context.setViewport(i.framebuffer)
|
|
return nil
|
|
}
|
|
|
|
func (i *Image) ReadPixels(buf []byte, x, y, width, height int) error {
|
|
if err := i.ensureFramebuffer(); err != nil {
|
|
return err
|
|
}
|
|
|
|
i.graphics.context.framebufferPixels(buf, i.framebuffer, x, y, width, height)
|
|
return nil
|
|
}
|
|
|
|
func (i *Image) framebufferSize() (int, int) {
|
|
if i.screen {
|
|
// The (default) framebuffer size can't be converted to a power of 2.
|
|
// On browsers, i.width and i.height are used as viewport size and
|
|
// Edge can't treat a bigger viewport than the drawing area (#71).
|
|
return i.width, i.height
|
|
}
|
|
return graphics.InternalImageSize(i.width), graphics.InternalImageSize(i.height)
|
|
}
|
|
|
|
func (i *Image) ensureFramebuffer() error {
|
|
if i.framebuffer != nil {
|
|
return nil
|
|
}
|
|
|
|
w, h := i.framebufferSize()
|
|
if i.screen {
|
|
i.framebuffer = newScreenFramebuffer(&i.graphics.context, w, h)
|
|
return nil
|
|
}
|
|
f, err := newFramebufferFromTexture(&i.graphics.context, i.texture, w, h)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
i.framebuffer = f
|
|
return nil
|
|
}
|
|
|
|
func (i *Image) ensureStencilBuffer() error {
|
|
if !i.stencil.equal(*new(renderbufferNative)) {
|
|
return nil
|
|
}
|
|
|
|
if err := i.ensureFramebuffer(); err != nil {
|
|
return err
|
|
}
|
|
|
|
r, err := i.graphics.context.newRenderbuffer(i.framebufferSize())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
i.stencil = r
|
|
|
|
if err := i.graphics.context.bindStencilBuffer(i.framebuffer.native, i.stencil); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (i *Image) WritePixels(args []*graphicsdriver.WritePixelsArgs) error {
|
|
if i.screen {
|
|
return errors.New("opengl: WritePixels cannot be called on the screen")
|
|
}
|
|
if len(args) == 0 {
|
|
return nil
|
|
}
|
|
|
|
// glFlush is necessary on Android.
|
|
// glTexSubImage2D didn't work without this hack at least on Nexus 5x and NuAns NEO [Reloaded] (#211).
|
|
if i.graphics.drawCalled {
|
|
i.graphics.context.flush()
|
|
}
|
|
i.graphics.drawCalled = false
|
|
i.graphics.context.texSubImage2D(i.texture, args)
|
|
return nil
|
|
}
|