mirror of
https://github.com/nicbarker/clay.git
synced 2025-11-04 00:26:17 +00:00
803 lines
44 KiB
HTML
803 lines
44 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<link rel="preload" href="/clay/fonts/Calistoga-Regular.ttf" as="font" type="font/ttf" crossorigin>
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<link rel="preload" href="/clay/fonts/Quicksand-Semibold.ttf" as="font" type="font/ttf" crossorigin>
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<title>Clay - UI Layout Library</title>
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<style>
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html, body {
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width: 100%;
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height: 100%;
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overflow: hidden;
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padding: 0;
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margin: 0;
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pointer-events: none;
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background: rgb(244, 235, 230);
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}
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/* Import the font using @font-face */
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@font-face {
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font-family: 'Calistoga';
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font-style: normal;
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font-weight: 400;
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src: url('/clay/fonts/Calistoga-Regular.ttf') format('truetype');
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}
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@font-face {
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font-family: 'Quicksand';
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font-style: normal;
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font-weight: 400;
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src: url('/clay/fonts/Quicksand-Semibold.ttf') format('truetype');
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}
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body > canvas {
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width: 100%;
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height: 100%;
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touch-action: none;
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}
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div, a, img {
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position: absolute;
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box-sizing: border-box;
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-webkit-backface-visibility: hidden;
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pointer-events: none;
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}
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a {
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cursor: pointer;
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pointer-events: all;
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}
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.text {
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pointer-events: all;
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white-space: pre;
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}
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/* TODO special exception for text selection in debug tools */
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[id='2067877626'] > * {
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pointer-events: none !important;
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}
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</style>
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</head>
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<script type="module">
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const CLAY_RENDER_COMMAND_TYPE_NONE = 0;
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const CLAY_RENDER_COMMAND_TYPE_RECTANGLE = 1;
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const CLAY_RENDER_COMMAND_TYPE_BORDER = 2;
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const CLAY_RENDER_COMMAND_TYPE_TEXT = 3;
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const CLAY_RENDER_COMMAND_TYPE_IMAGE = 4;
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const CLAY_RENDER_COMMAND_TYPE_SCISSOR_START = 5;
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const CLAY_RENDER_COMMAND_TYPE_SCISSOR_END = 6;
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const CLAY_RENDER_COMMAND_TYPE_CUSTOM = 7;
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const GLOBAL_FONT_SCALING_FACTOR = 0.8;
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let renderCommandSize = 0;
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let scratchSpaceAddress = 8;
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let heapSpaceAddress = 0;
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let memoryDataView;
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let textDecoder = new TextDecoder("utf-8");
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let previousFrameTime;
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let fontsById = [
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'Quicksand',
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'Calistoga',
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'Quicksand',
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'Quicksand',
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'Quicksand',
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];
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let elementCache = {};
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let imageCache = {};
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let colorDefinition = { type: 'struct', members: [
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{name: 'r', type: 'float' },
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{name: 'g', type: 'float' },
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{name: 'b', type: 'float' },
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{name: 'a', type: 'float' },
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]};
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let stringDefinition = { type: 'struct', members: [
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{name: 'length', type: 'uint32_t' },
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{name: 'chars', type: 'uint32_t' },
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]};
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let stringSliceDefinition = { type: 'struct', members: [
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{name: 'length', type: 'uint32_t' },
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{name: 'chars', type: 'uint32_t' },
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{name: 'baseChars', type: 'uint32_t' },
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]};
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let borderDefinition = { type: 'struct', members: [
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{name: 'width', type: 'uint32_t'},
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{name: 'color', ...colorDefinition},
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]};
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let cornerRadiusDefinition = { type: 'struct', members: [
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{name: 'topLeft', type: 'float'},
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{name: 'topRight', type: 'float'},
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{name: 'bottomLeft', type: 'float'},
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{name: 'bottomRight', type: 'float'},
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]};
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let rectangleConfigDefinition = { name: 'rectangle', type: 'struct', members: [
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{ name: 'color', ...colorDefinition },
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{ name: 'link', ...stringDefinition },
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{ name: 'cursorPointer', type: 'uint8_t' },
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]};
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let borderConfigDefinition = { name: 'text', type: 'struct', members: [
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{ name: 'left', ...borderDefinition },
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{ name: 'right', ...borderDefinition },
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{ name: 'top', ...borderDefinition },
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{ name: 'bottom', ...borderDefinition },
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{ name: 'betweenChildren', ...borderDefinition },
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]};
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let textConfigDefinition = { name: 'text', type: 'struct', members: [
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{ name: 'textColor', ...colorDefinition },
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{ name: 'fontId', type: 'uint16_t' },
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{ name: 'fontSize', type: 'uint16_t' },
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{ name: 'letterSpacing', type: 'uint16_t' },
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{ name: 'lineSpacing', type: 'uint16_t' },
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{ name: 'wrapMode', type: 'uint32_t' },
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{ name: 'disablePointerEvents', type: 'uint8_t' }
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]};
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let scrollConfigDefinition = { name: 'text', type: 'struct', members: [
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{ name: 'horizontal', type: 'bool' },
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{ name: 'vertical', type: 'bool' },
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]};
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let imageConfigDefinition = { name: 'image', type: 'struct', members: [
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{ name: 'imageData', type: 'uint32_t' },
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{ name: 'sourceDimensions', type: 'struct', members: [
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{ name: 'width', type: 'float' },
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{ name: 'height', type: 'float' },
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]},
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{ name: 'sourceURL', ...stringDefinition }
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]};
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let customConfigDefinition = { name: 'custom', type: 'struct', members: [
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{ name: 'customData', type: 'uint32_t' },
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]}
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let sharedConfigDefinition = { name: 'shared', type: 'struct', members: [
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{ name: 'cornerRadius', ...cornerRadiusDefinition },
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]};
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let renderCommandDefinition = {
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name: 'CLay_RenderCommand',
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type: 'struct',
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members: [
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{ name: 'boundingBox', type: 'struct', members: [
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{ name: 'x', type: 'float' },
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{ name: 'y', type: 'float' },
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{ name: 'width', type: 'float' },
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{ name: 'height', type: 'float' },
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]},
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{ name: 'config', type: 'uint32_t'},
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{ name: 'textOrSharedConfig', type: 'union', members: [
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{ name: 'text', ...stringSliceDefinition },
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{ name: 'sharedConfig', type: 'uint32_t' }
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]},
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{ name: 'zIndex', type: 'int32_t' },
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{ name: 'id', type: 'uint32_t' },
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{ name: 'commandType', type: 'uint32_t', },
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]
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};
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function getStructTotalSize(definition) {
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switch(definition.type) {
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case 'union':
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case 'struct': {
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let totalSize = 0;
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for (const member of definition.members) {
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let result = getStructTotalSize(member);
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if (definition.type === 'struct') {
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totalSize += result;
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} else {
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totalSize = Math.max(totalSize, result);
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}
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}
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return totalSize;
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}
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case 'float': return 4;
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case 'uint32_t': return 4;
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case 'int32_t': return 4;
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case 'uint16_t': return 2;
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case 'uint8_t': return 1;
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case 'bool': return 1;
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default: {
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throw "Unimplemented C data type " + definition.type
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}
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}
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}
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function readStructAtAddress(address, definition) {
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switch(definition.type) {
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case 'union':
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case 'struct': {
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let struct = { __size: 0 };
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for (const member of definition.members) {
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let result = readStructAtAddress(address, member);
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struct[member.name] = result;
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if (definition.type === 'struct') {
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struct.__size += result.__size;
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address += result.__size;
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} else {
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struct.__size = Math.max(struct.__size, result.__size);
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}
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}
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return struct;
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}
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case 'float': return { value: memoryDataView.getFloat32(address, true), __size: 4 };
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case 'uint32_t': return { value: memoryDataView.getUint32(address, true), __size: 4 };
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case 'int32_t': return { value: memoryDataView.getUint32(address, true), __size: 4 };
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case 'uint16_t': return { value: memoryDataView.getUint16(address, true), __size: 2 };
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case 'uint8_t': return { value: memoryDataView.getUint8(address, true), __size: 1 };
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case 'bool': return { value: memoryDataView.getUint8(address, true), __size: 1 };
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default: {
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throw "Unimplemented C data type " + definition.type
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}
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}
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}
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function getTextDimensions(text, font) {
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// re-use canvas object for better performance
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window.canvasContext.font = font;
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let metrics = window.canvasContext.measureText(text);
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return { width: metrics.width, height: metrics.fontBoundingBoxAscent + metrics.fontBoundingBoxDescent };
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}
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function createMainArena(arenaStructAddress, arenaMemoryAddress) {
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let memorySize = instance.exports.Clay_MinMemorySize();
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// Last arg is address to store return value
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instance.exports.Clay_CreateArenaWithCapacityAndMemory(arenaStructAddress, memorySize, arenaMemoryAddress);
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}
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async function init() {
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await Promise.all(fontsById.map(f => document.fonts.load(`12px "${f}"`)));
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window.htmlRoot = document.body.appendChild(document.createElement('div'));
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window.canvasRoot = document.body.appendChild(document.createElement('canvas'));
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window.canvasContext = window.canvasRoot.getContext("2d");
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window.mousePositionXThisFrame = 0;
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window.mousePositionYThisFrame = 0;
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window.mouseWheelXThisFrame = 0;
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window.mouseWheelYThisFrame = 0;
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window.touchDown = false;
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window.arrowKeyDownPressedThisFrame = false;
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window.arrowKeyUpPressedThisFrame = false;
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let zeroTimeout = null;
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document.addEventListener("wheel", (event) => {
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window.mouseWheelXThisFrame = event.deltaX * -0.1;
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window.mouseWheelYThisFrame = event.deltaY * -0.1;
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clearTimeout(zeroTimeout);
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zeroTimeout = setTimeout(() => {
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window.mouseWheelXThisFrame = 0;
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window.mouseWheelYThisFrame = 0;
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}, 10);
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});
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function handleTouch (event) {
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if (event.touches.length === 1) {
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window.touchDown = true;
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let target = event.target;
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let scrollTop = 0;
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let scrollLeft = 0;
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let activeRendererIndex = memoryDataView.getUint32(instance.exports.ACTIVE_RENDERER_INDEX.value, true);
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while (activeRendererIndex !== 1 && target) {
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scrollLeft += target.scrollLeft;
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scrollTop += target.scrollTop;
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target = target.parentElement;
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}
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window.mousePositionXThisFrame = event.changedTouches[0].pageX + scrollLeft;
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window.mousePositionYThisFrame = event.changedTouches[0].pageY + scrollTop;
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}
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}
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document.addEventListener("touchstart", handleTouch);
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document.addEventListener("touchmove", handleTouch);
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document.addEventListener("touchend", () => {
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window.touchDown = false;
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window.mousePositionXThisFrame = 0;
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window.mousePositionYThisFrame = 0;
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})
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document.addEventListener("mousemove", (event) => {
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let target = event.target;
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let scrollTop = 0;
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let scrollLeft = 0;
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let activeRendererIndex = memoryDataView.getUint32(instance.exports.ACTIVE_RENDERER_INDEX.value, true);
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while (activeRendererIndex !== 1 && target) {
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scrollLeft += target.scrollLeft;
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scrollTop += target.scrollTop;
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target = target.parentElement;
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}
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window.mousePositionXThisFrame = event.x + scrollLeft;
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window.mousePositionYThisFrame = event.y + scrollTop;
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});
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document.addEventListener("mousedown", (event) => {
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window.mouseDown = true;
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window.mouseDownThisFrame = true;
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});
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document.addEventListener("mouseup", (event) => {
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window.mouseDown = false;
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});
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document.addEventListener("keydown", (event) => {
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if (event.key === "ArrowDown") {
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window.arrowKeyDownPressedThisFrame = true;
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}
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if (event.key === "ArrowUp") {
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window.arrowKeyUpPressedThisFrame = true;
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}
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if (event.key === "d") {
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window.dKeyPressedThisFrame = true;
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}
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});
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const importObject = {
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clay: {
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measureTextFunction: (addressOfDimensions, textToMeasure, addressOfConfig, userData) => {
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let stringLength = memoryDataView.getUint32(textToMeasure, true);
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let pointerToString = memoryDataView.getUint32(textToMeasure + 4, true);
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let textConfig = readStructAtAddress(addressOfConfig, textConfigDefinition);
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let textDecoder = new TextDecoder("utf-8");
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let text = textDecoder.decode(memoryDataView.buffer.slice(pointerToString, pointerToString + stringLength));
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let sourceDimensions = getTextDimensions(text, `${Math.round(textConfig.fontSize.value * GLOBAL_FONT_SCALING_FACTOR)}px ${fontsById[textConfig.fontId.value]}`);
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memoryDataView.setFloat32(addressOfDimensions, sourceDimensions.width, true);
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memoryDataView.setFloat32(addressOfDimensions + 4, sourceDimensions.height, true);
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},
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queryScrollOffsetFunction: (addressOfOffset, elementId) => {
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let container = document.getElementById(elementId.toString());
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if (container) {
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memoryDataView.setFloat32(addressOfOffset, -container.scrollLeft, true);
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memoryDataView.setFloat32(addressOfOffset + 4, -container.scrollTop, true);
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}
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}
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},
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};
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const { instance } = await WebAssembly.instantiateStreaming(
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fetch("/clay/index.wasm"), importObject
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);
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memoryDataView = new DataView(new Uint8Array(instance.exports.memory.buffer).buffer);
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scratchSpaceAddress = instance.exports.__heap_base.value;
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heapSpaceAddress = instance.exports.__heap_base.value + 1024;
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let arenaAddress = scratchSpaceAddress + 8;
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window.instance = instance;
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createMainArena(arenaAddress, heapSpaceAddress);
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memoryDataView.setFloat32(instance.exports.__heap_base.value, window.innerWidth, true);
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memoryDataView.setFloat32(instance.exports.__heap_base.value + 4, window.innerHeight, true);
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instance.exports.Clay_Initialize(arenaAddress, instance.exports.__heap_base.value);
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renderCommandSize = getStructTotalSize(renderCommandDefinition);
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renderLoop();
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}
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function MemoryIsDifferent(one, two, length) {
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for (let i = 0; i < length; i++) {
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if (one[i] !== two[i]) {
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return true;
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}
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}
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return false;
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}
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function renderLoopHTML() {
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let capacity = memoryDataView.getInt32(scratchSpaceAddress, true);
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let length = memoryDataView.getInt32(scratchSpaceAddress + 4, true);
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let arrayOffset = memoryDataView.getUint32(scratchSpaceAddress + 8, true);
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let scissorStack = [{ nextAllocation: { x: 0, y: 0 }, element: htmlRoot, nextElementIndex: 0 }];
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let previousId = 0;
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for (let i = 0; i < length; i++, arrayOffset += renderCommandSize) {
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let entireRenderCommandMemory = new Uint32Array(memoryDataView.buffer.slice(arrayOffset, arrayOffset + renderCommandSize));
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let renderCommand = readStructAtAddress(arrayOffset, renderCommandDefinition);
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let parentElement = scissorStack[scissorStack.length - 1];
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let element = null;
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let isMultiConfigElement = previousId === renderCommand.id.value;
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if (!elementCache[renderCommand.id.value]) {
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let elementType = 'div';
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switch (renderCommand.commandType.value & 0xff) {
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case CLAY_RENDER_COMMAND_TYPE_RECTANGLE: {
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if (readStructAtAddress(renderCommand.config.value, rectangleConfigDefinition).link.length.value > 0) {
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elementType = 'a';
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}
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break;
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}
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case CLAY_RENDER_COMMAND_TYPE_IMAGE: {
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console.log('test5');
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elementType = 'img'; break;
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}
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default: break;
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}
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element = document.createElement(elementType);
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element.id = renderCommand.id.value;
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if (renderCommand.commandType.value === CLAY_RENDER_COMMAND_TYPE_SCISSOR_START) {
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element.style.overflow = 'hidden';
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}
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elementCache[renderCommand.id.value] = {
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exists: true,
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element: element,
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previousMemoryCommand: new Uint8Array(0),
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previousMemoryConfig: new Uint8Array(0),
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previousMemoryText: new Uint8Array(0)
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};
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}
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let elementData = elementCache[renderCommand.id.value];
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element = elementData.element;
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if (!isMultiConfigElement && Array.prototype.indexOf.call(parentElement.element.children, element) !== parentElement.nextElementIndex) {
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if (parentElement.nextElementIndex === 0) {
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parentElement.element.insertAdjacentElement('afterbegin', element);
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} else {
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parentElement.element.childNodes[Math.min(parentElement.nextElementIndex - 1, parentElement.element.childNodes.length - 1)].insertAdjacentElement('afterend', element);
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}
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}
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elementData.exists = true;
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// Don't get me started. Cheaper to compare the render command memory than to update HTML elements
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let dirty = MemoryIsDifferent(elementData.previousMemoryCommand, entireRenderCommandMemory, renderCommandSize) && !isMultiConfigElement;
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if (!isMultiConfigElement) {
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parentElement.nextElementIndex++;
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}
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previousId = renderCommand.id.value;
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elementData.previousMemoryCommand = entireRenderCommandMemory;
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let offsetX = scissorStack.length > 0 ? scissorStack[scissorStack.length - 1].nextAllocation.x : 0;
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let offsetY = scissorStack.length > 0 ? scissorStack[scissorStack.length - 1].nextAllocation.y : 0;
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if (dirty) {
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element.style.transform = `translate(${Math.round(renderCommand.boundingBox.x.value - offsetX)}px, ${Math.round(renderCommand.boundingBox.y.value - offsetY)}px)`
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element.style.width = Math.round(renderCommand.boundingBox.width.value) + 'px';
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element.style.height = Math.round(renderCommand.boundingBox.height.value) + 'px';
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}
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// note: commandType is packed to uint8_t and has 3 garbage bytes of padding
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switch(renderCommand.commandType.value & 0xff) {
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case (CLAY_RENDER_COMMAND_TYPE_NONE): {
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break;
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}
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case (CLAY_RENDER_COMMAND_TYPE_RECTANGLE): {
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let config = readStructAtAddress(renderCommand.config.value, rectangleConfigDefinition);
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let sharedConfig = readStructAtAddress( renderCommand.textOrSharedConfig.sharedConfig.value, sharedConfigDefinition);
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let configMemory = new Uint8Array(memoryDataView.buffer.slice(renderCommand.config.value, renderCommand.config.value + config.__size));
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let linkContents = config.link.length.value > 0 ? textDecoder.decode(new Uint8Array(memoryDataView.buffer.slice(config.link.chars.value, config.link.chars.value + config.link.length.value))) : 0;
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memoryDataView.setUint32(0, renderCommand.id.value, true);
|
|
if (linkContents.length > 0 && (window.mouseDownThisFrame || window.touchDown) && instance.exports.Clay_PointerOver(0)) {
|
|
window.location.href = linkContents;
|
|
}
|
|
if (!dirty && !MemoryIsDifferent(configMemory, elementData.previousMemoryConfig, config.__size)) {
|
|
break;
|
|
}
|
|
if (linkContents.length > 0) {
|
|
element.href = linkContents;
|
|
}
|
|
|
|
if (linkContents.length > 0 || config.cursorPointer.value) {
|
|
element.style.pointerEvents = 'all';
|
|
element.style.cursor = 'pointer';
|
|
}
|
|
elementData.previousMemoryConfig = configMemory;
|
|
let color = config.color;
|
|
element.style.backgroundColor = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
if (sharedConfig.cornerRadius.topLeft.value > 0) {
|
|
element.style.borderTopLeftRadius = sharedConfig.cornerRadius.topLeft.value + 'px';
|
|
}
|
|
if (sharedConfig.cornerRadius.topRight.value > 0) {
|
|
element.style.borderTopRightRadius = sharedConfig.cornerRadius.topRight.value + 'px';
|
|
}
|
|
if (sharedConfig.cornerRadius.bottomLeft.value > 0) {
|
|
element.style.borderBottomLeftRadius = sharedConfig.cornerRadius.bottomLeft.value + 'px';
|
|
}
|
|
if (sharedConfig.cornerRadius.bottomRight.value > 0) {
|
|
element.style.borderBottomRightRadius = sharedConfig.cornerRadius.bottomRight.value + 'px';
|
|
}
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_BORDER): {
|
|
let config = readStructAtAddress(renderCommand.config.value, borderConfigDefinition);
|
|
let sharedConfig = readStructAtAddress( renderCommand.textOrSharedConfig.sharedConfig.value, sharedConfigDefinition);
|
|
let configMemory = new Uint8Array(memoryDataView.buffer.slice(renderCommand.config.value, renderCommand.config.value + config.__size));
|
|
if (!dirty && !MemoryIsDifferent(configMemory, elementData.previousMemoryConfig, config.__size)) {
|
|
break;
|
|
}
|
|
elementData.previousMemoryConfig = configMemory;
|
|
if (config.left.width.value > 0) {
|
|
let color = config.left.color;
|
|
element.style.borderLeft = `${config.left.width.value}px solid rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`
|
|
}
|
|
if (config.right.width.value > 0) {
|
|
let color = config.right.color;
|
|
element.style.borderRight = `${config.right.width.value}px solid rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`
|
|
}
|
|
if (config.top.width.value > 0) {
|
|
let color = config.top.color;
|
|
element.style.borderTop = `${config.top.width.value}px solid rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`
|
|
}
|
|
if (config.bottom.width.value > 0) {
|
|
let color = config.bottom.color;
|
|
element.style.borderBottom = `${config.bottom.width.value}px solid rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`
|
|
}
|
|
if (sharedConfig.cornerRadius.topLeft.value > 0) {
|
|
element.style.borderTopLeftRadius = sharedConfig.cornerRadius.topLeft.value + 'px';
|
|
}
|
|
if (sharedConfig.cornerRadius.topRight.value > 0) {
|
|
element.style.borderTopRightRadius = sharedConfig.cornerRadius.topRight.value + 'px';
|
|
}
|
|
if (sharedConfig.cornerRadius.bottomLeft.value > 0) {
|
|
element.style.borderBottomLeftRadius = sharedConfig.cornerRadius.bottomLeft.value + 'px';
|
|
}
|
|
if (sharedConfig.cornerRadius.bottomRight.value > 0) {
|
|
element.style.borderBottomRightRadius = sharedConfig.cornerRadius.bottomRight.value + 'px';
|
|
}
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_TEXT): {
|
|
let config = readStructAtAddress(renderCommand.config.value, textConfigDefinition);
|
|
let configMemory = new Uint8Array(memoryDataView.buffer.slice(renderCommand.config.value, renderCommand.config.value + config.__size));
|
|
let textContents = renderCommand.textOrSharedConfig.text;
|
|
let stringContents = new Uint8Array(memoryDataView.buffer.slice(textContents.chars.value, textContents.chars.value + textContents.length.value));
|
|
if (MemoryIsDifferent(configMemory, elementData.previousMemoryConfig, config.__size)) {
|
|
element.className = 'text';
|
|
let textColor = config.textColor;
|
|
let fontSize = Math.round(config.fontSize.value * GLOBAL_FONT_SCALING_FACTOR);
|
|
element.style.color = `rgba(${textColor.r.value}, ${textColor.g.value}, ${textColor.b.value}, ${textColor.a.value})`;
|
|
element.style.fontFamily = fontsById[config.fontId.value];
|
|
element.style.fontSize = fontSize + 'px';
|
|
element.style.pointerEvents = config.disablePointerEvents.value ? 'none' : 'all';
|
|
elementData.previousMemoryConfig = configMemory;
|
|
}
|
|
if (stringContents.length !== elementData.previousMemoryText.length || MemoryIsDifferent(stringContents, elementData.previousMemoryText, stringContents.length)) {
|
|
element.innerHTML = textDecoder.decode(stringContents);
|
|
}
|
|
elementData.previousMemoryText = stringContents;
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_SCISSOR_START): {
|
|
scissorStack.push({ nextAllocation: { x: renderCommand.boundingBox.x.value, y: renderCommand.boundingBox.y.value }, element, nextElementIndex: 0 });
|
|
let config = readStructAtAddress(renderCommand.config.value, scrollConfigDefinition);
|
|
if (config.horizontal.value) {
|
|
element.style.overflowX = 'scroll';
|
|
element.style.pointerEvents = 'auto';
|
|
}
|
|
if (config.vertical.value) {
|
|
element.style.overflowY = 'scroll';
|
|
element.style.pointerEvents = 'auto';
|
|
}
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_SCISSOR_END): {
|
|
scissorStack.splice(scissorStack.length - 1, 1);
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_IMAGE): {
|
|
console.log('test1');
|
|
let config = readStructAtAddress(renderCommand.config.value, imageConfigDefinition);
|
|
let srcContents = new Uint8Array(memoryDataView.buffer.slice(config.sourceURL.chars.value, config.sourceURL.chars.value + config.sourceURL.length.value));
|
|
if (srcContents.length !== elementData.previousMemoryText.length || MemoryIsDifferent(srcContents, elementData.previousMemoryText, srcContents.length)) {
|
|
element.src = textDecoder.decode(srcContents);
|
|
}
|
|
elementData.previousMemoryText = srcContents;
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_CUSTOM): break;
|
|
}
|
|
}
|
|
|
|
for (const key of Object.keys(elementCache)) {
|
|
if (elementCache[key].exists) {
|
|
elementCache[key].exists = false;
|
|
} else {
|
|
elementCache[key].element.remove();
|
|
delete elementCache[key];
|
|
}
|
|
}
|
|
}
|
|
|
|
function renderLoopCanvas() {
|
|
// Note: Rendering to canvas needs to be scaled up by window.devicePixelRatio in both width and height.
|
|
// e.g. if we're working on a device where devicePixelRatio is 2, we need to render
|
|
// everything at width^2 x height^2 resolution, then scale back down with css to get the correct pixel density.
|
|
let capacity = memoryDataView.getUint32(scratchSpaceAddress, true);
|
|
let length = memoryDataView.getUint32(scratchSpaceAddress + 4, true);
|
|
let arrayOffset = memoryDataView.getUint32(scratchSpaceAddress + 8, true);
|
|
window.canvasRoot.width = window.innerWidth * window.devicePixelRatio;
|
|
window.canvasRoot.height = window.innerHeight * window.devicePixelRatio;
|
|
window.canvasRoot.style.width = window.innerWidth + 'px';
|
|
window.canvasRoot.style.height = window.innerHeight + 'px';
|
|
let ctx = window.canvasContext;
|
|
let scale = window.devicePixelRatio;
|
|
for (let i = 0; i < length; i++, arrayOffset += renderCommandSize) {
|
|
let renderCommand = readStructAtAddress(arrayOffset, renderCommandDefinition);
|
|
let boundingBox = renderCommand.boundingBox;
|
|
|
|
// note: commandType is packed to uint8_t and has 3 garbage bytes of padding
|
|
switch(renderCommand.commandType.value & 0xff) {
|
|
case (CLAY_RENDER_COMMAND_TYPE_NONE): {
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_RECTANGLE): {
|
|
let config = readStructAtAddress(renderCommand.config.value, rectangleConfigDefinition);
|
|
let color = config.color;
|
|
ctx.beginPath();
|
|
window.canvasContext.fillStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
window.canvasContext.roundRect(
|
|
boundingBox.x.value * scale, // x
|
|
boundingBox.y.value * scale, // y
|
|
boundingBox.width.value * scale, // width
|
|
boundingBox.height.value * scale,
|
|
[config.cornerRadius.topLeft.value * scale, config.cornerRadius.topRight.value * scale, config.cornerRadius.bottomRight.value * scale, config.cornerRadius.bottomLeft.value * scale]) // height;
|
|
ctx.fill();
|
|
ctx.closePath();
|
|
// Handle link clicks
|
|
let linkContents = config.link.length.value > 0 ? textDecoder.decode(new Uint8Array(memoryDataView.buffer.slice(config.link.chars.value, config.link.chars.value + config.link.length.value))) : 0;
|
|
memoryDataView.setUint32(0, renderCommand.id.value, true);
|
|
if (linkContents.length > 0 && (window.mouseDownThisFrame || window.touchDown) && instance.exports.Clay_PointerOver(0)) {
|
|
window.location.href = linkContents;
|
|
}
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_BORDER): {
|
|
let config = readStructAtAddress(renderCommand.config.value, borderConfigDefinition);
|
|
ctx.beginPath();
|
|
ctx.moveTo(boundingBox.x.value * scale, boundingBox.y.value * scale);
|
|
// Top Left Corner
|
|
if (config.cornerRadius.topLeft.value > 0) {
|
|
let lineWidth = config.top.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
ctx.moveTo((boundingBox.x.value + halfLineWidth) * scale, (boundingBox.y.value + config.cornerRadius.topLeft.value + halfLineWidth) * scale);
|
|
let color = config.top.color;
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.arcTo((boundingBox.x.value + halfLineWidth) * scale, (boundingBox.y.value + halfLineWidth) * scale, (boundingBox.x.value + config.cornerRadius.topLeft.value + halfLineWidth) * scale, (boundingBox.y.value + halfLineWidth) * scale, config.cornerRadius.topLeft.value * scale);
|
|
ctx.stroke();
|
|
}
|
|
// Top border
|
|
if (config.top.width.value > 0) {
|
|
let lineWidth = config.top.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
let color = config.top.color;
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.moveTo((boundingBox.x.value + config.cornerRadius.topLeft.value + halfLineWidth) * scale, (boundingBox.y.value + halfLineWidth) * scale);
|
|
ctx.lineTo((boundingBox.x.value + boundingBox.width.value - config.cornerRadius.topRight.value - halfLineWidth) * scale, (boundingBox.y.value + halfLineWidth) * scale);
|
|
ctx.stroke();
|
|
}
|
|
// Top Right Corner
|
|
if (config.cornerRadius.topRight.value > 0) {
|
|
let lineWidth = config.top.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
ctx.moveTo((boundingBox.x.value + boundingBox.width.value - config.cornerRadius.topRight.value - halfLineWidth) * scale, (boundingBox.y.value + halfLineWidth) * scale);
|
|
let color = config.top.color;
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.arcTo((boundingBox.x.value + boundingBox.width.value - halfLineWidth) * scale, (boundingBox.y.value + halfLineWidth) * scale, (boundingBox.x.value + boundingBox.width.value - halfLineWidth) * scale, (boundingBox.y.value + config.cornerRadius.topRight.value + halfLineWidth) * scale, config.cornerRadius.topRight.value * scale);
|
|
ctx.stroke();
|
|
}
|
|
// Right border
|
|
if (config.right.width.value > 0) {
|
|
let color = config.right.color;
|
|
let lineWidth = config.right.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.moveTo((boundingBox.x.value + boundingBox.width.value - halfLineWidth) * scale, (boundingBox.y.value + config.cornerRadius.topRight.value + halfLineWidth) * scale);
|
|
ctx.lineTo((boundingBox.x.value + boundingBox.width.value - halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - config.cornerRadius.topRight.value - halfLineWidth) * scale);
|
|
ctx.stroke();
|
|
}
|
|
// Bottom Right Corner
|
|
if (config.cornerRadius.bottomRight.value > 0) {
|
|
let color = config.top.color;
|
|
let lineWidth = config.top.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
ctx.moveTo((boundingBox.x.value + boundingBox.width.value - halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - config.cornerRadius.bottomRight.value - halfLineWidth) * scale);
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.arcTo((boundingBox.x.value + boundingBox.width.value - halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - halfLineWidth) * scale, (boundingBox.x.value + boundingBox.width.value - config.cornerRadius.bottomRight.value - halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - halfLineWidth) * scale, config.cornerRadius.bottomRight.value * scale);
|
|
ctx.stroke();
|
|
}
|
|
// Bottom Border
|
|
if (config.bottom.width.value > 0) {
|
|
let color = config.bottom.color;
|
|
let lineWidth = config.bottom.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.moveTo((boundingBox.x.value + config.cornerRadius.bottomLeft.value + halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - halfLineWidth) * scale);
|
|
ctx.lineTo((boundingBox.x.value + boundingBox.width.value - config.cornerRadius.bottomRight.value - halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - halfLineWidth) * scale);
|
|
ctx.stroke();
|
|
}
|
|
// Bottom Left Corner
|
|
if (config.cornerRadius.bottomLeft.value > 0) {
|
|
let color = config.bottom.color;
|
|
let lineWidth = config.bottom.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
ctx.moveTo((boundingBox.x.value + config.cornerRadius.bottomLeft.value + halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - halfLineWidth) * scale);
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.arcTo((boundingBox.x.value + halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - halfLineWidth) * scale, (boundingBox.x.value + halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - config.cornerRadius.bottomLeft.value - halfLineWidth) * scale, config.cornerRadius.bottomLeft.value * scale);
|
|
ctx.stroke();
|
|
}
|
|
// Left Border
|
|
if (config.left.width.value > 0) {
|
|
let color = config.left.color;
|
|
let lineWidth = config.left.width.value;
|
|
let halfLineWidth = lineWidth / 2;
|
|
ctx.lineWidth = lineWidth * scale;
|
|
ctx.strokeStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.moveTo((boundingBox.x.value + halfLineWidth) * scale, (boundingBox.y.value + boundingBox.height.value - config.cornerRadius.bottomLeft.value - halfLineWidth) * scale);
|
|
ctx.lineTo((boundingBox.x.value + halfLineWidth) * scale, (boundingBox.y.value + config.cornerRadius.bottomRight.value + halfLineWidth) * scale);
|
|
ctx.stroke();
|
|
}
|
|
ctx.closePath();
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_TEXT): {
|
|
let config = readStructAtAddress(renderCommand.config.value, textConfigDefinition);
|
|
let textContents = renderCommand.text;
|
|
let stringContents = new Uint8Array(memoryDataView.buffer.slice(textContents.chars.value, textContents.chars.value + textContents.length.value));
|
|
let fontSize = config.fontSize.value * GLOBAL_FONT_SCALING_FACTOR * scale;
|
|
ctx.font = `${fontSize}px ${fontsById[config.fontId.value]}`;
|
|
let color = config.textColor;
|
|
ctx.textBaseline = 'middle';
|
|
ctx.fillStyle = `rgba(${color.r.value}, ${color.g.value}, ${color.b.value}, ${color.a.value / 255})`;
|
|
ctx.fillText(textDecoder.decode(stringContents), boundingBox.x.value * scale, (boundingBox.y.value + boundingBox.height.value / 2 + 1) * scale);
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_SCISSOR_START): {
|
|
window.canvasContext.save();
|
|
window.canvasContext.beginPath();
|
|
window.canvasContext.rect(boundingBox.x.value * scale, boundingBox.y.value * scale, boundingBox.width.value * scale, boundingBox.height.value * scale);
|
|
window.canvasContext.clip();
|
|
window.canvasContext.closePath();
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_SCISSOR_END): {
|
|
window.canvasContext.restore();
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_IMAGE): {
|
|
let config = readStructAtAddress(renderCommand.config.value, imageConfigDefinition);
|
|
let src = textDecoder.decode(new Uint8Array(memoryDataView.buffer.slice(config.sourceURL.chars.value, config.sourceURL.chars.value + config.sourceURL.length.value)));
|
|
if (!imageCache[src]) {
|
|
imageCache[src] = {
|
|
image: new Image(),
|
|
loaded: false,
|
|
}
|
|
imageCache[src].image.onload = () => imageCache[src].loaded = true;
|
|
imageCache[src].image.src = src;
|
|
} else if (imageCache[src].loaded) {
|
|
ctx.drawImage(imageCache[src].image, boundingBox.x.value * scale, boundingBox.y.value * scale, boundingBox.width.value * scale, boundingBox.height.value * scale);
|
|
}
|
|
break;
|
|
}
|
|
case (CLAY_RENDER_COMMAND_TYPE_CUSTOM): break;
|
|
}
|
|
}
|
|
}
|
|
|
|
function renderLoop(currentTime) {
|
|
const elapsed = currentTime - previousFrameTime;
|
|
previousFrameTime = currentTime;
|
|
let activeRendererIndex = memoryDataView.getUint32(instance.exports.ACTIVE_RENDERER_INDEX.value, true);
|
|
if (activeRendererIndex === 0) {
|
|
instance.exports.UpdateDrawFrame(scratchSpaceAddress, window.innerWidth, window.innerHeight, 0, 0, window.mousePositionXThisFrame, window.mousePositionYThisFrame, window.touchDown, window.mouseDown, 0, 0, window.dKeyPressedThisFrame, elapsed / 1000);
|
|
} else {
|
|
instance.exports.UpdateDrawFrame(scratchSpaceAddress, window.innerWidth, window.innerHeight, window.mouseWheelXThisFrame, window.mouseWheelYThisFrame, window.mousePositionXThisFrame, window.mousePositionYThisFrame, window.touchDown, window.mouseDown, window.arrowKeyDownPressedThisFrame, window.arrowKeyUpPressedThisFrame, window.dKeyPressedThisFrame, elapsed / 1000);
|
|
}
|
|
let rendererChanged = activeRendererIndex !== window.previousActiveRendererIndex;
|
|
switch (activeRendererIndex) {
|
|
case 0: {
|
|
renderLoopHTML();
|
|
if (rendererChanged) {
|
|
window.htmlRoot.style.display = 'block';
|
|
window.canvasRoot.style.display = 'none';
|
|
}
|
|
break;
|
|
}
|
|
case 1: {
|
|
renderLoopCanvas();
|
|
if (rendererChanged) {
|
|
window.htmlRoot.style.display = 'none';
|
|
window.canvasRoot.style.display = 'block';
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
window.previousActiveRendererIndex = activeRendererIndex;
|
|
requestAnimationFrame(renderLoop);
|
|
window.mouseDownThisFrame = false;
|
|
window.arrowKeyUpPressedThisFrame = false;
|
|
window.arrowKeyDownPressedThisFrame = false;
|
|
window.dKeyPressedThisFrame = false;
|
|
}
|
|
init();
|
|
</script>
|
|
<body>
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</body>
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</html> |