440 lines
20 KiB
TypeScript
440 lines
20 KiB
TypeScript
import { createMaskedProgram, createMaskRevealPreviewProgram, createProgram, createTintedProgram, getMaskVisualizationResources, maskVisualizationModeValue, type MaskVisualizationResources } from "./image-texture-programs";
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import type { Asset } from "@core/asset";
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import type { RgbaColor, ScreenRect, WebGlRendererContext } from "./types";
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import type { Rect } from "@core/geometry";
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import { rotatedRectBounds, rotatedRectCorners } from "./rotated-rect";
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import { textureCoordinatesForCrop, textureCoordinatesForRect } from "./texture-coordinates";
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export type MaskVisualizationMode = "blackWhite" | "alpha" | "hiddenOverlay";
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export type ImageTextureRenderer = {
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syncAssets(assets: readonly Asset[]): void;
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render(asset: Asset, rect: ScreenRect, clipRect?: ScreenRect, opacity?: number, rotation?: number, sourceRect?: Rect): boolean;
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renderMasked(asset: Asset, rect: ScreenRect, maskAsset: Asset, maskRect: ScreenRect, clipRect?: ScreenRect, opacity?: number, rotation?: number, sourceRect?: Rect): boolean;
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renderMaskRevealPreview(asset: Asset, rect: ScreenRect, maskAsset: Asset, maskRect: ScreenRect, opacity: number, clipRect?: ScreenRect, layerOpacity?: number, rotation?: number, sourceRect?: Rect): boolean;
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renderMaskVisualization(maskAsset: Asset, maskRect: ScreenRect, mode: MaskVisualizationMode, color?: RgbaColor, clipRect?: ScreenRect): boolean;
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renderTinted(asset: Asset, rect: ScreenRect, color: RgbaColor, clipRect?: ScreenRect, opacity?: number): boolean;
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dispose(): void;
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};
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type TextureState =
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| { status: "loading"; image: HTMLImageElement }
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| { status: "ready"; texture: WebGLTexture }
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| { status: "error" };
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type TextureEntry = {
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source: string;
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current: TextureState;
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previousTexture?: WebGLTexture;
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};
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export function createImageTextureRenderer(context: WebGlRendererContext, invalidate: () => void): ImageTextureRenderer {
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const { gl } = context;
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const program = createProgram(gl);
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const positionLocation = gl.getAttribLocation(program, "a_position");
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const texCoordLocation = gl.getAttribLocation(program, "a_texCoord");
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const samplerLocation = gl.getUniformLocation(program, "u_image");
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const opacityLocation = gl.getUniformLocation(program, "u_opacity");
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const maskedProgram = createMaskedProgram(gl);
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const maskedPositionLocation = gl.getAttribLocation(maskedProgram, "a_position");
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const maskedTexCoordLocation = gl.getAttribLocation(maskedProgram, "a_texCoord");
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const maskedMaskTexCoordLocation = gl.getAttribLocation(maskedProgram, "a_maskTexCoord");
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const maskedSamplerLocation = gl.getUniformLocation(maskedProgram, "u_image");
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const maskedMaskSamplerLocation = gl.getUniformLocation(maskedProgram, "u_mask");
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const maskedOpacityLocation = gl.getUniformLocation(maskedProgram, "u_opacity");
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const maskRevealPreviewProgram = createMaskRevealPreviewProgram(gl);
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const maskRevealPreviewPositionLocation = gl.getAttribLocation(maskRevealPreviewProgram, "a_position");
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const maskRevealPreviewTexCoordLocation = gl.getAttribLocation(maskRevealPreviewProgram, "a_texCoord");
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const maskRevealPreviewMaskTexCoordLocation = gl.getAttribLocation(maskRevealPreviewProgram, "a_maskTexCoord");
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const maskRevealPreviewSamplerLocation = gl.getUniformLocation(maskRevealPreviewProgram, "u_image");
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const maskRevealPreviewMaskSamplerLocation = gl.getUniformLocation(maskRevealPreviewProgram, "u_mask");
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const maskRevealPreviewOpacityLocation = gl.getUniformLocation(maskRevealPreviewProgram, "u_opacity");
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const tintedProgram = createTintedProgram(gl);
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const tintedPositionLocation = gl.getAttribLocation(tintedProgram, "a_position");
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const tintedTexCoordLocation = gl.getAttribLocation(tintedProgram, "a_texCoord");
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const tintedSamplerLocation = gl.getUniformLocation(tintedProgram, "u_image");
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const tintedColorLocation = gl.getUniformLocation(tintedProgram, "u_color");
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const positionBuffer = gl.createBuffer();
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const texCoordBuffer = gl.createBuffer();
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const maskTexCoordBuffer = gl.createBuffer();
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const textures = new Map<string, TextureEntry>();
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let maskVisualizationResources: MaskVisualizationResources | "failed" | undefined;
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let disposed = false;
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if (
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!positionBuffer ||
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!texCoordBuffer ||
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!maskTexCoordBuffer ||
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!samplerLocation ||
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!opacityLocation ||
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!maskedSamplerLocation ||
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!maskedMaskSamplerLocation ||
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!maskedOpacityLocation ||
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!maskRevealPreviewSamplerLocation ||
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!maskRevealPreviewMaskSamplerLocation ||
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!maskRevealPreviewOpacityLocation ||
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!tintedSamplerLocation ||
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!tintedColorLocation
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) throw new Error("Failed to create image texture renderer");
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gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1]), gl.STATIC_DRAW);
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return {
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syncAssets(assets) {
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const activeIds = new Set(assets.map((asset) => asset.id));
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for (const [assetId, entry] of textures) {
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if (!activeIds.has(assetId)) {
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disposeEntry(gl, entry);
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textures.delete(assetId);
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}
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}
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},
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render(asset, rect, clipRect, opacity = 1, rotation = 0, sourceRect) {
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const clampedOpacity = clampOpacity(opacity);
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if (clampedOpacity <= 0) return true;
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const rotatedRect = rotatedRectBounds(rect, rotation);
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const drawRect = clipRect ? intersectScreenRects(rotatedRect, clipRect) : rotatedRect;
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if (!drawRect || drawRect.w <= 0 || drawRect.h <= 0) return true;
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const entry = getTextureEntry(context, textures, asset, invalidate, () => disposed);
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const texture = renderableTexture(entry);
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if (!texture) return false;
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gl.enable(gl.SCISSOR_TEST);
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gl.scissor(drawRect.x, context.canvas.height - drawRect.y - drawRect.h, drawRect.w, drawRect.h);
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enablePremultipliedAlphaBlending(gl);
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gl.useProgram(program);
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gl.activeTexture(gl.TEXTURE0);
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.uniform1i(samplerLocation, 0);
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gl.uniform1f(opacityLocation, clampedOpacity);
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gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, rectVertices(context.canvas, rect, rotation), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(positionLocation);
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gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, textureCoordinatesForCrop(asset.intrinsicSize, sourceRect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(texCoordLocation);
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gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
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gl.drawArrays(gl.TRIANGLES, 0, 6);
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gl.disable(gl.BLEND);
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return true;
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},
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renderMasked(asset, rect, maskAsset, maskRect, clipRect, opacity = 1, rotation = 0, sourceRect) {
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const clampedOpacity = clampOpacity(opacity);
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if (clampedOpacity <= 0) return true;
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const contentBounds = rotatedRectBounds(rect, rotation);
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const maskBounds = rotatedRectBounds(maskRect, rotation);
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const clippedRect = clipRect ? intersectScreenRects(contentBounds, clipRect) : contentBounds;
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const drawRect = clippedRect ? intersectScreenRects(clippedRect, maskBounds) : undefined;
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if (!drawRect || drawRect.w <= 0 || drawRect.h <= 0) return true;
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const entry = getTextureEntry(context, textures, asset, invalidate, () => disposed);
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const maskEntry = getTextureEntry(context, textures, maskAsset, invalidate, () => disposed);
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const texture = renderableTexture(entry);
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const maskTexture = renderableTexture(maskEntry);
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if (!texture || !maskTexture) return false;
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gl.enable(gl.SCISSOR_TEST);
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gl.scissor(drawRect.x, context.canvas.height - drawRect.y - drawRect.h, drawRect.w, drawRect.h);
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enablePremultipliedAlphaBlending(gl);
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gl.useProgram(maskedProgram);
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gl.activeTexture(gl.TEXTURE0);
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.uniform1i(maskedSamplerLocation, 0);
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gl.activeTexture(gl.TEXTURE1);
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gl.bindTexture(gl.TEXTURE_2D, maskTexture);
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gl.uniform1i(maskedMaskSamplerLocation, 1);
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gl.uniform1f(maskedOpacityLocation, clampedOpacity);
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gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, rectVertices(context.canvas, rect, rotation), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(maskedPositionLocation);
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gl.vertexAttribPointer(maskedPositionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, textureCoordinatesForCrop(asset.intrinsicSize, sourceRect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(maskedTexCoordLocation);
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gl.vertexAttribPointer(maskedTexCoordLocation, 2, gl.FLOAT, false, 0, 0);
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gl.bindBuffer(gl.ARRAY_BUFFER, maskTexCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, textureCoordinatesForRect(rect, maskRect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(maskedMaskTexCoordLocation);
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gl.vertexAttribPointer(maskedMaskTexCoordLocation, 2, gl.FLOAT, false, 0, 0);
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gl.drawArrays(gl.TRIANGLES, 0, 6);
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gl.disable(gl.BLEND);
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return true;
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},
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renderMaskRevealPreview(asset, rect, maskAsset, maskRect, opacity, clipRect, layerOpacity = 1, rotation = 0, sourceRect) {
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const clampedOpacity = clampOpacity(opacity) * clampOpacity(layerOpacity);
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if (clampedOpacity <= 0) return true;
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const contentBounds = rotatedRectBounds(rect, rotation);
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const maskBounds = rotatedRectBounds(maskRect, rotation);
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const clippedRect = clipRect ? intersectScreenRects(contentBounds, clipRect) : contentBounds;
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const drawRect = clippedRect ? intersectScreenRects(clippedRect, maskBounds) : undefined;
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if (!drawRect || drawRect.w <= 0 || drawRect.h <= 0) return true;
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const entry = getTextureEntry(context, textures, asset, invalidate, () => disposed);
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const maskEntry = getTextureEntry(context, textures, maskAsset, invalidate, () => disposed);
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const texture = renderableTexture(entry);
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const maskTexture = renderableTexture(maskEntry);
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if (!texture || !maskTexture) return false;
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gl.enable(gl.SCISSOR_TEST);
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gl.scissor(drawRect.x, context.canvas.height - drawRect.y - drawRect.h, drawRect.w, drawRect.h);
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enablePremultipliedAlphaBlending(gl);
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gl.useProgram(maskRevealPreviewProgram);
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gl.activeTexture(gl.TEXTURE0);
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.uniform1i(maskRevealPreviewSamplerLocation, 0);
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gl.activeTexture(gl.TEXTURE1);
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gl.bindTexture(gl.TEXTURE_2D, maskTexture);
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gl.uniform1i(maskRevealPreviewMaskSamplerLocation, 1);
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gl.uniform1f(maskRevealPreviewOpacityLocation, clampedOpacity);
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gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, rectVertices(context.canvas, rect, rotation), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(maskRevealPreviewPositionLocation);
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gl.vertexAttribPointer(maskRevealPreviewPositionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, textureCoordinatesForCrop(asset.intrinsicSize, sourceRect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(maskRevealPreviewTexCoordLocation);
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gl.vertexAttribPointer(maskRevealPreviewTexCoordLocation, 2, gl.FLOAT, false, 0, 0);
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gl.bindBuffer(gl.ARRAY_BUFFER, maskTexCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, textureCoordinatesForRect(rect, maskRect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(maskRevealPreviewMaskTexCoordLocation);
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gl.vertexAttribPointer(maskRevealPreviewMaskTexCoordLocation, 2, gl.FLOAT, false, 0, 0);
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gl.drawArrays(gl.TRIANGLES, 0, 6);
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gl.disable(gl.BLEND);
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return true;
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},
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renderMaskVisualization(maskAsset, maskRect, mode, color = [1, 1, 1, 1], clipRect) {
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const drawRect = clipRect ? intersectScreenRects(maskRect, clipRect) : maskRect;
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if (!drawRect || drawRect.w <= 0 || drawRect.h <= 0) return true;
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const resources = getMaskVisualizationResources(gl, () => maskVisualizationResources, (nextResources) => {
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maskVisualizationResources = nextResources;
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});
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if (!resources) return false;
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const maskEntry = getTextureEntry(context, textures, maskAsset, invalidate, () => disposed);
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const maskTexture = renderableTexture(maskEntry);
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if (!maskTexture) return false;
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gl.enable(gl.SCISSOR_TEST);
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gl.scissor(drawRect.x, context.canvas.height - drawRect.y - drawRect.h, drawRect.w, drawRect.h);
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enablePremultipliedAlphaBlending(gl);
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gl.useProgram(resources.program);
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gl.activeTexture(gl.TEXTURE0);
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gl.bindTexture(gl.TEXTURE_2D, maskTexture);
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gl.uniform1i(resources.samplerLocation, 0);
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gl.uniform1i(resources.modeLocation, maskVisualizationModeValue(mode));
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gl.uniform4fv(resources.colorLocation, color);
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gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, rectVertices(context.canvas, drawRect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(resources.positionLocation);
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gl.vertexAttribPointer(resources.positionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, texCoordsForRect(drawRect, maskRect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(resources.texCoordLocation);
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gl.vertexAttribPointer(resources.texCoordLocation, 2, gl.FLOAT, false, 0, 0);
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gl.drawArrays(gl.TRIANGLES, 0, 6);
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gl.disable(gl.BLEND);
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return true;
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},
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renderTinted(asset, rect, color, clipRect, opacity = 1) {
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const clampedOpacity = clampOpacity(opacity);
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if (clampedOpacity <= 0) return true;
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const drawRect = clipRect ? intersectScreenRects(rect, clipRect) : rect;
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if (!drawRect || drawRect.w <= 0 || drawRect.h <= 0) return true;
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const entry = getTextureEntry(context, textures, asset, invalidate, () => disposed);
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const texture = renderableTexture(entry);
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if (!texture) return false;
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gl.enable(gl.SCISSOR_TEST);
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gl.scissor(drawRect.x, context.canvas.height - drawRect.y - drawRect.h, drawRect.w, drawRect.h);
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enablePremultipliedAlphaBlending(gl);
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gl.useProgram(tintedProgram);
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gl.activeTexture(gl.TEXTURE0);
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.uniform1i(tintedSamplerLocation, 0);
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gl.uniform4fv(tintedColorLocation, [color[0], color[1], color[2], color[3] * clampedOpacity]);
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gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, rectVertices(context.canvas, rect), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(tintedPositionLocation);
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gl.vertexAttribPointer(tintedPositionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, fullTexCoords(), gl.DYNAMIC_DRAW);
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gl.enableVertexAttribArray(tintedTexCoordLocation);
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gl.vertexAttribPointer(tintedTexCoordLocation, 2, gl.FLOAT, false, 0, 0);
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gl.drawArrays(gl.TRIANGLES, 0, 6);
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gl.disable(gl.BLEND);
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return true;
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},
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dispose() {
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disposed = true;
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for (const entry of textures.values()) disposeEntry(gl, entry);
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gl.deleteBuffer(positionBuffer);
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gl.deleteBuffer(texCoordBuffer);
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gl.deleteBuffer(maskTexCoordBuffer);
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gl.deleteProgram(program);
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gl.deleteProgram(maskedProgram);
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gl.deleteProgram(maskRevealPreviewProgram);
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if (maskVisualizationResources && maskVisualizationResources !== "failed") gl.deleteProgram(maskVisualizationResources.program);
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gl.deleteProgram(tintedProgram);
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},
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};
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}
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function getTextureEntry(
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context: WebGlRendererContext,
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textures: Map<string, TextureEntry>,
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asset: Asset,
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invalidate: () => void,
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isDisposed: () => boolean,
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): TextureEntry {
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const cached = textures.get(asset.id);
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if (cached && cached.source === asset.source) return cached;
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if (cached) {
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if (cached.current.status === "ready") {
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if (cached.previousTexture) context.gl.deleteTexture(cached.previousTexture);
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cached.previousTexture = cached.current.texture;
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} else {
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disposeState(context.gl, cached.current);
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}
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cached.source = asset.source;
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cached.current = loadTextureState(context, asset, cached, invalidate, isDisposed);
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return cached;
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}
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const entry: TextureEntry = { source: asset.source, current: { status: "error" } };
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entry.current = loadTextureState(context, asset, entry, invalidate, isDisposed);
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textures.set(asset.id, entry);
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return entry;
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}
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function loadTextureState(
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context: WebGlRendererContext,
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asset: Asset,
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entry: TextureEntry,
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invalidate: () => void,
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isDisposed: () => boolean,
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): TextureState {
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const image = new Image();
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const source = asset.source;
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image.onload = () => {
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if (isDisposed() || entry.source !== source) return;
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const texture = createTexture(context.gl, image);
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if (entry.previousTexture) context.gl.deleteTexture(entry.previousTexture);
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entry.previousTexture = undefined;
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entry.current = { status: "ready", texture };
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invalidate();
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};
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image.onerror = () => {
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if (isDisposed() || entry.source !== source) return;
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entry.current = { status: "error" };
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invalidate();
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};
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image.src = source;
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return { status: "loading", image };
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}
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function renderableTexture(entry: TextureEntry): WebGLTexture | undefined {
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if (entry.current.status === "ready") return entry.current.texture;
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return entry.previousTexture;
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}
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function disposeEntry(gl: WebGL2RenderingContext, entry: TextureEntry) {
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disposeState(gl, entry.current);
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if (entry.previousTexture) gl.deleteTexture(entry.previousTexture);
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}
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function disposeState(gl: WebGL2RenderingContext, state: TextureState) {
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if (state.status === "ready") {
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gl.deleteTexture(state.texture);
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return;
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}
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if (state.status === "loading") {
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state.image.onload = null;
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state.image.onerror = null;
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}
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}
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function intersectScreenRects(a: ScreenRect, b: ScreenRect): ScreenRect | undefined {
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const x1 = Math.max(a.x, b.x);
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const y1 = Math.max(a.y, b.y);
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const x2 = Math.min(a.x + a.w, b.x + b.w);
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const y2 = Math.min(a.y + a.h, b.y + b.h);
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if (x2 <= x1 || y2 <= y1) return undefined;
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return { x: x1, y: y1, w: x2 - x1, h: y2 - y1 };
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}
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function createTexture(gl: WebGL2RenderingContext, image: HTMLImageElement) {
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const texture = gl.createTexture();
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if (!texture) throw new Error("Failed to create image texture");
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
|
|
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, false);
|
|
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true);
|
|
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
|
|
|
|
return texture;
|
|
}
|
|
|
|
function enablePremultipliedAlphaBlending(gl: WebGL2RenderingContext) {
|
|
gl.enable(gl.BLEND);
|
|
gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
|
|
}
|
|
|
|
function clampOpacity(opacity: number) {
|
|
return Math.max(0, Math.min(1, opacity));
|
|
}
|
|
|
|
function fullTexCoords() {
|
|
return new Float32Array([0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1]);
|
|
}
|
|
|
|
function texCoordsForRect(drawRect: ScreenRect, sourceRect: ScreenRect) {
|
|
const x1 = (drawRect.x - sourceRect.x) / sourceRect.w;
|
|
const x2 = (drawRect.x + drawRect.w - sourceRect.x) / sourceRect.w;
|
|
const y1 = (drawRect.y - sourceRect.y) / sourceRect.h;
|
|
const y2 = (drawRect.y + drawRect.h - sourceRect.y) / sourceRect.h;
|
|
|
|
return new Float32Array([x1, y1, x2, y1, x1, y2, x1, y2, x2, y1, x2, y2]);
|
|
}
|
|
|
|
function rectVertices(canvas: HTMLCanvasElement, rect: ScreenRect, rotation = 0) {
|
|
const [nw, ne, sw, se] = rotatedRectCorners(rect, rotation).map((point) => ({
|
|
x: (point.x / canvas.width) * 2 - 1,
|
|
y: 1 - (point.y / canvas.height) * 2,
|
|
}));
|
|
return new Float32Array([nw!.x, nw!.y, ne!.x, ne!.y, sw!.x, sw!.y, sw!.x, sw!.y, ne!.x, ne!.y, se!.x, se!.y]);
|
|
}
|