2019-09-19 05:02:35 +02:00
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// Copyright 2019 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package buffered
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import (
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2020-02-16 13:45:26 +01:00
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"fmt"
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"image"
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2019-09-19 05:02:35 +02:00
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2021-03-11 15:13:24 +01:00
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"github.com/hajimehoshi/ebiten/v2/internal/atlas"
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2020-10-03 19:35:13 +02:00
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"github.com/hajimehoshi/ebiten/v2/internal/graphics"
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2022-02-06 12:41:32 +01:00
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
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2022-04-03 19:15:33 +02:00
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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)
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type Image struct {
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img *atlas.Image
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width int
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height int
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pixels []byte
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}
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func BeginFrame(graphicsDriver graphicsdriver.Graphics) error {
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if err := atlas.BeginFrame(graphicsDriver); err != nil {
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return err
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}
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flushDelayedCommands()
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return nil
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}
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func EndFrame(graphicsDriver graphicsdriver.Graphics) error {
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return atlas.EndFrame(graphicsDriver)
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}
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2022-06-07 16:57:56 +02:00
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func NewImage(width, height int, imageType atlas.ImageType) *Image {
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i := &Image{
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width: width,
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height: height,
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}
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i.initialize(imageType)
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return i
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}
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2022-06-07 16:57:56 +02:00
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func (i *Image) initialize(imageType atlas.ImageType) {
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if maybeCanAddDelayedCommand() {
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if tryAddDelayedCommand(func() {
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i.initialize(imageType)
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}) {
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return
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}
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}
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i.img = atlas.NewImage(i.width, i.height, imageType)
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}
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func (i *Image) invalidatePixels() {
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i.pixels = nil
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}
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func (i *Image) MarkDisposed() {
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if maybeCanAddDelayedCommand() {
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if tryAddDelayedCommand(func() {
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i.MarkDisposed()
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}) {
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return
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}
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}
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i.invalidatePixels()
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i.img.MarkDisposed()
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}
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func (i *Image) ReadPixels(graphicsDriver graphicsdriver.Graphics, pixels []byte, x, y, width, height int) error {
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checkDelayedCommandsFlushed("ReadPixels")
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r := image.Rect(x, y, x+width, y+height).Intersect(image.Rect(0, 0, i.width, i.height))
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if r.Empty() {
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for i := range pixels {
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pixels[i] = 0
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}
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return nil
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}
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if i.pixels == nil {
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pix := make([]byte, 4*i.width*i.height)
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if err := i.img.ReadPixels(graphicsDriver, pix); err != nil {
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return err
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}
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i.pixels = pix
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}
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dstBaseX := r.Min.X - x
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dstBaseY := r.Min.Y - y
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srcBaseX := r.Min.X
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srcBaseY := r.Min.Y
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lineWidth := 4 * r.Dx()
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for j := 0; j < r.Dy(); j++ {
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dstX := 4 * ((dstBaseY+j)*width + dstBaseX)
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srcX := 4 * ((srcBaseY+j)*i.width + srcBaseX)
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copy(pixels[dstX:dstX+lineWidth], i.pixels[srcX:srcX+lineWidth])
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}
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return nil
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}
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2022-08-31 06:10:41 +02:00
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func (i *Image) DumpScreenshot(graphicsDriver graphicsdriver.Graphics, name string, blackbg bool) (string, error) {
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checkDelayedCommandsFlushed("Dump")
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return i.img.DumpScreenshot(graphicsDriver, name, blackbg)
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}
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2022-08-07 20:29:12 +02:00
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// WritePixels replaces the pixels at the specified region.
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func (i *Image) WritePixels(pix []byte, x, y, width, height int) {
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if l := 4 * width * height; len(pix) != l {
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panic(fmt.Sprintf("buffered: len(pix) was %d but must be %d", len(pix), l))
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}
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if maybeCanAddDelayedCommand() {
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copied := make([]byte, len(pix))
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copy(copied, pix)
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if tryAddDelayedCommand(func() {
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i.WritePixels(copied, x, y, width, height)
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}) {
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return
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}
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}
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i.invalidatePixels()
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i.img.WritePixels(pix, x, y, width, height)
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}
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// DrawTriangles draws the src image with the given vertices.
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//
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// Copying vertices and indices is the caller's responsibility.
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func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint16, mode graphicsdriver.CompositeMode, dstRegion, srcRegion graphicsdriver.Region, subimageOffsets [graphics.ShaderImageCount - 1][2]float32, shader *Shader, uniforms [][]float32, evenOdd bool) {
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for _, src := range srcs {
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if i == src {
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panic("buffered: Image.DrawTriangles: source images must be different from the receiver")
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}
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}
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2019-09-26 20:12:21 +02:00
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2020-06-29 14:45:57 +02:00
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if maybeCanAddDelayedCommand() {
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2022-06-24 18:42:40 +02:00
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if tryAddDelayedCommand(func() {
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// Arguments are not copied. Copying is the caller's responsibility.
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i.DrawTriangles(srcs, vertices, indices, mode, dstRegion, srcRegion, subimageOffsets, shader, uniforms, evenOdd)
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}) {
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return
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}
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}
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2022-07-12 18:46:02 +02:00
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var imgs [graphics.ShaderImageCount]*atlas.Image
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for i, img := range srcs {
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if img == nil {
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continue
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}
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imgs[i] = img.img
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}
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2022-03-21 07:27:21 +01:00
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i.invalidatePixels()
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2022-10-02 16:49:07 +02:00
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i.img.DrawTriangles(imgs, vertices, indices, mode, dstRegion, srcRegion, subimageOffsets, shader.shader, uniforms, evenOdd)
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}
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type Shader struct {
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shader *atlas.Shader
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}
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2022-04-03 19:15:33 +02:00
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func NewShader(ir *shaderir.Program) *Shader {
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s := &Shader{}
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s.initialize(ir)
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return s
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}
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func (s *Shader) initialize(ir *shaderir.Program) {
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if maybeCanAddDelayedCommand() {
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if tryAddDelayedCommand(func() {
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s.initialize(ir)
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}) {
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return
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}
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}
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s.shader = atlas.NewShader(ir)
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}
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func (s *Shader) MarkDisposed() {
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if maybeCanAddDelayedCommand() {
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2022-06-24 18:42:40 +02:00
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if tryAddDelayedCommand(func() {
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s.MarkDisposed()
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}) {
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return
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}
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}
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s.shader.MarkDisposed()
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s.shader = nil
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}
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var (
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NearestFilterShader = &Shader{shader: atlas.NearestFilterShader}
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LinearFilterShader = &Shader{shader: atlas.LinearFilterShader}
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)
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