playcanvas
Version:
PlayCanvas WebGL game engine
107 lines (105 loc) • 3.41 kB
JavaScript
class FrameGraph {
addRenderPass(renderPass) {
renderPass.frameUpdate();
const beforePasses = renderPass.beforePasses;
for(let i = 0; i < beforePasses.length; i++){
const pass = beforePasses[i];
if (pass.enabled) {
this.addRenderPass(pass);
}
}
if (renderPass.enabled) {
this.renderPasses.push(renderPass);
}
const afterPasses = renderPass.afterPasses;
for(let i = 0; i < afterPasses.length; i++){
const pass = afterPasses[i];
if (pass.enabled) {
this.addRenderPass(pass);
}
}
}
reset() {
this.renderPasses.length = 0;
}
compile() {
const renderTargetMap = this.renderTargetMap;
const renderPasses = this.renderPasses;
for(let i = 0; i < renderPasses.length; i++){
const renderPass = renderPasses[i];
const renderTarget = renderPass.renderTarget;
if (renderTarget !== undefined) {
const prevPass = renderTargetMap.get(renderTarget);
if (prevPass) {
const count = renderPass.colorArrayOps.length;
for(let j = 0; j < count; j++){
const colorOps = renderPass.colorArrayOps[j];
if (!colorOps.clear) {
prevPass.colorArrayOps[j].store = true;
}
}
if (!renderPass.depthStencilOps.clearDepth) {
prevPass.depthStencilOps.storeDepth = true;
}
if (!renderPass.depthStencilOps.clearStencil) {
prevPass.depthStencilOps.storeStencil = true;
}
}
renderTargetMap.set(renderTarget, renderPass);
}
}
for(let i = 0; i < renderPasses.length - 1; i++){
const firstPass = renderPasses[i];
const firstRT = firstPass.renderTarget;
const secondPass = renderPasses[i + 1];
const secondRT = secondPass.renderTarget;
if (firstRT !== secondRT || firstRT === undefined) {
continue;
}
if (secondPass.depthStencilOps.clearDepth || secondPass.depthStencilOps.clearStencil || secondPass.colorArrayOps.some((colorOps)=>colorOps.clear)) {
continue;
}
if (firstPass.afterPasses.length > 0) {
continue;
}
if (secondPass.beforePasses.length > 0) {
continue;
}
firstPass._skipEnd = true;
secondPass._skipStart = true;
}
let lastCubeTexture = null;
let lastCubeRenderPass = null;
for(let i = 0; i < renderPasses.length; i++){
const renderPass = renderPasses[i];
const renderTarget = renderPass.renderTarget;
const thisTexture = renderTarget?.colorBuffer;
if (thisTexture?.cubemap) {
if (lastCubeTexture === thisTexture) {
const count = lastCubeRenderPass.colorArrayOps.length;
for(let j = 0; j < count; j++){
lastCubeRenderPass.colorArrayOps[j].mipmaps = false;
}
}
lastCubeTexture = renderTarget.colorBuffer;
lastCubeRenderPass = renderPass;
} else if (renderPass.requiresCubemaps) {
lastCubeTexture = null;
lastCubeRenderPass = null;
}
}
renderTargetMap.clear();
}
render(device) {
this.compile();
const renderPasses = this.renderPasses;
for(let i = 0; i < renderPasses.length; i++){
renderPasses[i].render();
}
}
constructor(){
this.renderPasses = [];
this.renderTargetMap = new Map();
}
}
export { FrameGraph };