mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
142 lines
3.2 KiB
Go
142 lines
3.2 KiB
Go
// Copyright 2016 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 graphics
|
|
|
|
import (
|
|
"image"
|
|
|
|
"github.com/hajimehoshi/ebiten/internal/affine"
|
|
"github.com/hajimehoshi/ebiten/internal/math"
|
|
"github.com/hajimehoshi/ebiten/internal/opengl"
|
|
)
|
|
|
|
// Image represents an image that is implemented with OpenGL.
|
|
type Image struct {
|
|
texture *texture
|
|
framebuffer *framebuffer
|
|
width int
|
|
height int
|
|
}
|
|
|
|
// MaxImageSize is the maximum of width/height of an image.
|
|
const MaxImageSize = defaultViewportSize
|
|
|
|
func NewImage(width, height int) *Image {
|
|
i := &Image{
|
|
width: width,
|
|
height: height,
|
|
}
|
|
c := &newImageCommand{
|
|
result: i,
|
|
width: width,
|
|
height: height,
|
|
}
|
|
theCommandQueue.Enqueue(c)
|
|
return i
|
|
}
|
|
|
|
func NewImageFromImage(img *image.RGBA, width, height int) *Image {
|
|
i := &Image{
|
|
width: width,
|
|
height: height,
|
|
}
|
|
c := &newImageFromImageCommand{
|
|
result: i,
|
|
img: img,
|
|
}
|
|
theCommandQueue.Enqueue(c)
|
|
return i
|
|
}
|
|
|
|
func NewScreenFramebufferImage(width, height int, offsetX, offsetY float64) *Image {
|
|
i := &Image{
|
|
width: width,
|
|
height: height,
|
|
}
|
|
c := &newScreenFramebufferImageCommand{
|
|
result: i,
|
|
width: width,
|
|
height: height,
|
|
offsetX: offsetX,
|
|
offsetY: offsetY,
|
|
}
|
|
theCommandQueue.Enqueue(c)
|
|
return i
|
|
}
|
|
|
|
func (i *Image) Dispose() {
|
|
c := &disposeCommand{
|
|
target: i,
|
|
}
|
|
theCommandQueue.Enqueue(c)
|
|
}
|
|
|
|
func (i *Image) Size() (int, int) {
|
|
return i.width, i.height
|
|
}
|
|
|
|
func (i *Image) Fill(r, g, b, a uint8) {
|
|
c := &fillCommand{
|
|
dst: i,
|
|
}
|
|
c.color.R = r
|
|
c.color.G = g
|
|
c.color.B = b
|
|
c.color.A = a
|
|
theCommandQueue.Enqueue(c)
|
|
}
|
|
|
|
func (i *Image) DrawImage(src *Image, vertices []float32, clr *affine.ColorM, mode opengl.CompositeMode, filter Filter) {
|
|
theCommandQueue.EnqueueDrawImageCommand(i, src, vertices, clr, mode, filter)
|
|
}
|
|
|
|
func (i *Image) Pixels() ([]byte, error) {
|
|
// Flush the enqueued commands so that pixels are certainly read.
|
|
if err := theCommandQueue.Flush(); err != nil {
|
|
return nil, err
|
|
}
|
|
f, err := i.createFramebufferIfNeeded()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return opengl.GetContext().FramebufferPixels(f.native, math.NextPowerOf2Int(i.width), math.NextPowerOf2Int(i.height))
|
|
}
|
|
|
|
func (i *Image) ReplacePixels(p []byte) {
|
|
pixels := make([]byte, len(p))
|
|
copy(pixels, p)
|
|
c := &replacePixelsCommand{
|
|
dst: i,
|
|
pixels: pixels,
|
|
}
|
|
theCommandQueue.Enqueue(c)
|
|
}
|
|
|
|
func (i *Image) IsInvalidated() bool {
|
|
return !opengl.GetContext().IsTexture(i.texture.native)
|
|
}
|
|
|
|
func (i *Image) createFramebufferIfNeeded() (*framebuffer, error) {
|
|
if i.framebuffer != nil {
|
|
return i.framebuffer, nil
|
|
}
|
|
f, err := newFramebufferFromTexture(i.texture, math.NextPowerOf2Int(i.width), math.NextPowerOf2Int(i.height))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
i.framebuffer = f
|
|
return i.framebuffer, nil
|
|
}
|