ebiten/internal/graphics/image.go
2016-11-05 03:06:18 +09:00

135 lines
2.9 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"
"image/color"
"github.com/hajimehoshi/ebiten/internal/affine"
"github.com/hajimehoshi/ebiten/internal/opengl"
)
type Image struct {
texture *texture
framebuffer *framebuffer
width int
height int
}
const ImageMaxSize = viewportSize
func NewImage(width, height int, filter opengl.Filter) (*Image, error) {
i := &Image{
width: width,
height: height,
}
c := &newImageCommand{
result: i,
width: width,
height: height,
filter: filter,
}
theCommandQueue.Enqueue(c)
return i, nil
}
func NewImageFromImage(img *image.RGBA, filter opengl.Filter) (*Image, error) {
s := img.Bounds().Size()
i := &Image{
width: s.X,
height: s.Y,
}
c := &newImageFromImageCommand{
result: i,
img: img,
filter: filter,
}
theCommandQueue.Enqueue(c)
return i, nil
}
func NewScreenFramebufferImage(width, height int) (*Image, error) {
i := &Image{
width: width,
height: height,
}
c := &newScreenFramebufferImageCommand{
result: i,
width: width,
height: height,
}
theCommandQueue.Enqueue(c)
return i, nil
}
func (i *Image) Dispose() error {
c := &disposeCommand{
target: i,
}
theCommandQueue.Enqueue(c)
return nil
}
func (i *Image) Size() (int, int) {
return i.width, i.height
}
func (i *Image) Fill(clr color.RGBA) error {
// TODO: Need to clone clr value
c := &fillCommand{
dst: i,
color: clr,
}
theCommandQueue.Enqueue(c)
return nil
}
func (i *Image) DrawImage(src *Image, vertices []float32, clr affine.ColorM, mode opengl.CompositeMode) error {
c := &drawImageCommand{
dst: i,
src: src,
vertices: vertices,
color: clr,
mode: mode,
}
theCommandQueue.Enqueue(c)
return nil
}
func (i *Image) Pixels(context *opengl.Context) ([]uint8, error) {
// Flush the enqueued commands so that pixels are certainly read.
if err := theCommandQueue.Flush(context); err != nil {
return nil, err
}
f := i.framebuffer
return context.FramebufferPixels(f.native, i.width, i.height)
}
func (i *Image) ReplacePixels(p []uint8) error {
pixels := make([]uint8, len(p))
copy(pixels, p)
c := &replacePixelsCommand{
dst: i,
pixels: pixels,
}
theCommandQueue.Enqueue(c)
return nil
}
func (i *Image) IsInvalidated(context *opengl.Context) bool {
return !context.IsTexture(i.texture.native)
}