287 lines
11 KiB
JavaScript
287 lines
11 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
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const THREE = require("three");
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class TGALoader extends THREE.DataTextureLoader {
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constructor(manager) {
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super(manager);
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}
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parse(buffer) {
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function tgaCheckHeader(header2) {
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switch (header2.image_type) {
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case TGA_TYPE_INDEXED:
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case TGA_TYPE_RLE_INDEXED:
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if (header2.colormap_length > 256 || header2.colormap_size !== 24 || header2.colormap_type !== 1) {
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console.error("THREE.TGALoader: Invalid type colormap data for indexed type.");
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}
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break;
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case TGA_TYPE_RGB:
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case TGA_TYPE_GREY:
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case TGA_TYPE_RLE_RGB:
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case TGA_TYPE_RLE_GREY:
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if (header2.colormap_type) {
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console.error("THREE.TGALoader: Invalid type colormap data for colormap type.");
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}
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break;
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case TGA_TYPE_NO_DATA:
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console.error("THREE.TGALoader: No data.");
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default:
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console.error('THREE.TGALoader: Invalid type "%s".', header2.image_type);
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}
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if (header2.width <= 0 || header2.height <= 0) {
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console.error("THREE.TGALoader: Invalid image size.");
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}
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if (header2.pixel_size !== 8 && header2.pixel_size !== 16 && header2.pixel_size !== 24 && header2.pixel_size !== 32) {
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console.error('THREE.TGALoader: Invalid pixel size "%s".', header2.pixel_size);
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}
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}
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function tgaParse(use_rle2, use_pal2, header2, offset2, data) {
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let pixel_data, palettes;
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const pixel_size = header2.pixel_size >> 3;
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const pixel_total = header2.width * header2.height * pixel_size;
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if (use_pal2) {
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palettes = data.subarray(offset2, offset2 += header2.colormap_length * (header2.colormap_size >> 3));
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}
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if (use_rle2) {
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pixel_data = new Uint8Array(pixel_total);
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let c, count, i;
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let shift = 0;
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const pixels = new Uint8Array(pixel_size);
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while (shift < pixel_total) {
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c = data[offset2++];
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count = (c & 127) + 1;
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if (c & 128) {
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for (i = 0; i < pixel_size; ++i) {
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pixels[i] = data[offset2++];
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}
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for (i = 0; i < count; ++i) {
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pixel_data.set(pixels, shift + i * pixel_size);
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}
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shift += pixel_size * count;
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} else {
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count *= pixel_size;
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for (i = 0; i < count; ++i) {
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pixel_data[shift + i] = data[offset2++];
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}
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shift += count;
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}
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}
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} else {
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pixel_data = data.subarray(offset2, offset2 += use_pal2 ? header2.width * header2.height : pixel_total);
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}
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return {
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pixel_data,
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palettes
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};
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}
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function tgaGetImageData8bits(imageData2, y_start, y_step, y_end, x_start, x_step, x_end, image, palettes) {
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const colormap = palettes;
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let color, i = 0, x, y;
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const width = header.width;
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for (y = y_start; y !== y_end; y += y_step) {
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for (x = x_start; x !== x_end; x += x_step, i++) {
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color = image[i];
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imageData2[(x + width * y) * 4 + 3] = 255;
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imageData2[(x + width * y) * 4 + 2] = colormap[color * 3 + 0];
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imageData2[(x + width * y) * 4 + 1] = colormap[color * 3 + 1];
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imageData2[(x + width * y) * 4 + 0] = colormap[color * 3 + 2];
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}
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}
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return imageData2;
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}
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function tgaGetImageData16bits(imageData2, y_start, y_step, y_end, x_start, x_step, x_end, image) {
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let color, i = 0, x, y;
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const width = header.width;
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for (y = y_start; y !== y_end; y += y_step) {
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for (x = x_start; x !== x_end; x += x_step, i += 2) {
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color = image[i + 0] + (image[i + 1] << 8);
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imageData2[(x + width * y) * 4 + 0] = (color & 31744) >> 7;
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imageData2[(x + width * y) * 4 + 1] = (color & 992) >> 2;
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imageData2[(x + width * y) * 4 + 2] = (color & 31) >> 3;
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imageData2[(x + width * y) * 4 + 3] = color & 32768 ? 0 : 255;
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}
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}
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return imageData2;
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}
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function tgaGetImageData24bits(imageData2, y_start, y_step, y_end, x_start, x_step, x_end, image) {
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let i = 0, x, y;
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const width = header.width;
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for (y = y_start; y !== y_end; y += y_step) {
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for (x = x_start; x !== x_end; x += x_step, i += 3) {
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imageData2[(x + width * y) * 4 + 3] = 255;
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imageData2[(x + width * y) * 4 + 2] = image[i + 0];
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imageData2[(x + width * y) * 4 + 1] = image[i + 1];
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imageData2[(x + width * y) * 4 + 0] = image[i + 2];
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}
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}
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return imageData2;
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}
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function tgaGetImageData32bits(imageData2, y_start, y_step, y_end, x_start, x_step, x_end, image) {
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let i = 0, x, y;
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const width = header.width;
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for (y = y_start; y !== y_end; y += y_step) {
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for (x = x_start; x !== x_end; x += x_step, i += 4) {
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imageData2[(x + width * y) * 4 + 2] = image[i + 0];
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imageData2[(x + width * y) * 4 + 1] = image[i + 1];
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imageData2[(x + width * y) * 4 + 0] = image[i + 2];
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imageData2[(x + width * y) * 4 + 3] = image[i + 3];
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}
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}
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return imageData2;
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}
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function tgaGetImageDataGrey8bits(imageData2, y_start, y_step, y_end, x_start, x_step, x_end, image) {
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let color, i = 0, x, y;
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const width = header.width;
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for (y = y_start; y !== y_end; y += y_step) {
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for (x = x_start; x !== x_end; x += x_step, i++) {
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color = image[i];
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imageData2[(x + width * y) * 4 + 0] = color;
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imageData2[(x + width * y) * 4 + 1] = color;
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imageData2[(x + width * y) * 4 + 2] = color;
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imageData2[(x + width * y) * 4 + 3] = 255;
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}
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}
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return imageData2;
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}
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function tgaGetImageDataGrey16bits(imageData2, y_start, y_step, y_end, x_start, x_step, x_end, image) {
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let i = 0, x, y;
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const width = header.width;
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for (y = y_start; y !== y_end; y += y_step) {
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for (x = x_start; x !== x_end; x += x_step, i += 2) {
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imageData2[(x + width * y) * 4 + 0] = image[i + 0];
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imageData2[(x + width * y) * 4 + 1] = image[i + 0];
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imageData2[(x + width * y) * 4 + 2] = image[i + 0];
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imageData2[(x + width * y) * 4 + 3] = image[i + 1];
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}
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}
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return imageData2;
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}
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function getTgaRGBA(data, width, height, image, palette) {
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let x_start, y_start, x_step, y_step, x_end, y_end;
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switch ((header.flags & TGA_ORIGIN_MASK) >> TGA_ORIGIN_SHIFT) {
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default:
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case TGA_ORIGIN_UL:
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x_start = 0;
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x_step = 1;
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x_end = width;
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y_start = 0;
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y_step = 1;
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y_end = height;
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break;
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case TGA_ORIGIN_BL:
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x_start = 0;
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x_step = 1;
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x_end = width;
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y_start = height - 1;
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y_step = -1;
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y_end = -1;
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break;
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case TGA_ORIGIN_UR:
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x_start = width - 1;
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x_step = -1;
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x_end = -1;
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y_start = 0;
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y_step = 1;
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y_end = height;
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break;
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case TGA_ORIGIN_BR:
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x_start = width - 1;
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x_step = -1;
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x_end = -1;
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y_start = height - 1;
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y_step = -1;
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y_end = -1;
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break;
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}
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if (use_grey) {
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switch (header.pixel_size) {
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case 8:
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tgaGetImageDataGrey8bits(data, y_start, y_step, y_end, x_start, x_step, x_end, image);
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break;
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case 16:
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tgaGetImageDataGrey16bits(data, y_start, y_step, y_end, x_start, x_step, x_end, image);
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break;
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default:
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console.error("THREE.TGALoader: Format not supported.");
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break;
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}
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} else {
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switch (header.pixel_size) {
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case 8:
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tgaGetImageData8bits(data, y_start, y_step, y_end, x_start, x_step, x_end, image, palette);
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break;
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case 16:
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tgaGetImageData16bits(data, y_start, y_step, y_end, x_start, x_step, x_end, image);
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break;
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case 24:
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tgaGetImageData24bits(data, y_start, y_step, y_end, x_start, x_step, x_end, image);
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break;
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case 32:
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tgaGetImageData32bits(data, y_start, y_step, y_end, x_start, x_step, x_end, image);
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break;
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default:
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console.error("THREE.TGALoader: Format not supported.");
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break;
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}
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}
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return data;
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}
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const TGA_TYPE_NO_DATA = 0, TGA_TYPE_INDEXED = 1, TGA_TYPE_RGB = 2, TGA_TYPE_GREY = 3, TGA_TYPE_RLE_INDEXED = 9, TGA_TYPE_RLE_RGB = 10, TGA_TYPE_RLE_GREY = 11, TGA_ORIGIN_MASK = 48, TGA_ORIGIN_SHIFT = 4, TGA_ORIGIN_BL = 0, TGA_ORIGIN_BR = 1, TGA_ORIGIN_UL = 2, TGA_ORIGIN_UR = 3;
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if (buffer.length < 19)
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console.error("THREE.TGALoader: Not enough data to contain header.");
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let offset = 0;
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const content = new Uint8Array(buffer), header = {
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id_length: content[offset++],
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colormap_type: content[offset++],
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image_type: content[offset++],
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colormap_index: content[offset++] | content[offset++] << 8,
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colormap_length: content[offset++] | content[offset++] << 8,
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colormap_size: content[offset++],
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origin: [content[offset++] | content[offset++] << 8, content[offset++] | content[offset++] << 8],
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width: content[offset++] | content[offset++] << 8,
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height: content[offset++] | content[offset++] << 8,
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pixel_size: content[offset++],
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flags: content[offset++]
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};
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tgaCheckHeader(header);
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if (header.id_length + offset > buffer.length) {
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console.error("THREE.TGALoader: No data.");
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}
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offset += header.id_length;
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let use_rle = false, use_pal = false, use_grey = false;
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switch (header.image_type) {
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case TGA_TYPE_RLE_INDEXED:
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use_rle = true;
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use_pal = true;
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break;
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case TGA_TYPE_INDEXED:
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use_pal = true;
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break;
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case TGA_TYPE_RLE_RGB:
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use_rle = true;
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break;
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case TGA_TYPE_RGB:
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break;
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case TGA_TYPE_RLE_GREY:
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use_rle = true;
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use_grey = true;
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break;
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case TGA_TYPE_GREY:
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use_grey = true;
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break;
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}
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const imageData = new Uint8Array(header.width * header.height * 4);
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const result = tgaParse(use_rle, use_pal, header, offset, content);
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getTgaRGBA(imageData, header.width, header.height, result.pixel_data, result.palettes);
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return {
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data: imageData,
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width: header.width,
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height: header.height,
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flipY: true,
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generateMipmaps: true,
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minFilter: THREE.LinearMipmapLinearFilter
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};
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}
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}
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exports.TGALoader = TGALoader;
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//# sourceMappingURL=TGALoader.cjs.map
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