mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
126 lines
3.6 KiB
Go
126 lines
3.6 KiB
Go
// Copyright 2017 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 restorable
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import (
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"github.com/hajimehoshi/ebiten/v2/internal/debug"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicscommand"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
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)
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func alwaysReadPixelsFromGPU() bool {
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return true
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}
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// images is a set of Image objects.
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type images struct {
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images map[*Image]struct{}
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shaders map[*Shader]struct{}
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lastTarget *Image
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}
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// theImages represents the images for the current process.
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var theImages = &images{
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images: map[*Image]struct{}{},
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shaders: map[*Shader]struct{}{},
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}
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func SwapBuffers(graphicsDriver graphicsdriver.Graphics) error {
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if debug.IsDebug {
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debug.FrameLogf("Internal image sizes:\n")
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imgs := make([]*graphicscommand.Image, 0, len(theImages.images))
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for i := range theImages.images {
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imgs = append(imgs, i.image)
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}
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graphicscommand.LogImagesInfo(imgs)
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}
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if err := graphicscommand.FlushCommands(graphicsDriver, true); err != nil {
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return err
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}
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return nil
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}
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// DumpImages dumps all the current images to the specified directory.
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//
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// This is for testing usage.
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func DumpImages(graphicsDriver graphicsdriver.Graphics, dir string) (string, error) {
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images := make([]*graphicscommand.Image, 0, len(theImages.images))
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for img := range theImages.images {
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images = append(images, img.image)
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}
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return graphicscommand.DumpImages(images, graphicsDriver, dir)
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}
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// add adds img to the images.
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func (i *images) add(img *Image) {
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i.images[img] = struct{}{}
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}
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func (i *images) addShader(shader *Shader) {
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i.shaders[shader] = struct{}{}
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}
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// remove removes img from the images.
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func (i *images) remove(img *Image) {
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i.makeStaleIfDependingOn(img)
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delete(i.images, img)
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}
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func (i *images) removeShader(shader *Shader) {
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i.makeStaleIfDependingOnShader(shader)
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delete(i.shaders, shader)
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}
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// makeStaleIfDependingOn makes all the images stale that depend on target.
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//
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// When target is modified, all images depending on target can't be restored with target.
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// makeStaleIfDependingOn is called in such situation.
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func (i *images) makeStaleIfDependingOn(target *Image) {
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if target == nil {
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panic("restorable: target must not be nil at makeStaleIfDependingOn")
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}
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if i.lastTarget == target {
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return
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}
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i.lastTarget = target
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for img := range i.images {
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img.makeStaleIfDependingOn(target)
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}
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}
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// makeStaleIfDependingOn makes all the images stale that depend on shader.
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func (i *images) makeStaleIfDependingOnShader(shader *Shader) {
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if shader == nil {
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panic("restorable: shader must not be nil at makeStaleIfDependingOnShader")
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}
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for img := range i.images {
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img.makeStaleIfDependingOnShader(shader)
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}
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}
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var graphicsDriverInitialized bool
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// InitializeGraphicsDriverState initializes the graphics driver state.
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func InitializeGraphicsDriverState(graphicsDriver graphicsdriver.Graphics) error {
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graphicsDriverInitialized = true
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return graphicscommand.InitializeGraphicsDriverState(graphicsDriver)
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}
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// MaxImageSize returns the maximum size of an image.
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func MaxImageSize(graphicsDriver graphicsdriver.Graphics) int {
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return graphicscommand.MaxImageSize(graphicsDriver)
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}
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