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e7b2eb4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | // @flow
import assert from 'assert';
import {
Uniform1i,
Uniform1f,
Uniform2f,
Uniform3f
} from '../uniform_binding';
import pixelsToTileUnits from '../../source/pixels_to_tile_units';
import type Painter from '../painter';
import type {OverscaledTileID} from '../../source/tile_id';
import type {CrossFaded} from '../../style/properties';
import type {CrossfadeParameters} from '../../style/evaluation_parameters';
import type {UniformValues} from '../uniform_binding';
import type Tile from '../../source/tile';
import type ResolvedImage from '../../style-spec/expression/types/resolved_image';
type BackgroundPatternUniformsType = {|
'u_image': Uniform1i,
'u_pattern_tl_a': Uniform2f,
'u_pattern_br_a': Uniform2f,
'u_pattern_tl_b': Uniform2f,
'u_pattern_br_b': Uniform2f,
'u_texsize': Uniform2f,
'u_mix': Uniform1f,
'u_pattern_size_a': Uniform2f,
'u_pattern_size_b': Uniform2f,
'u_scale_a': Uniform1f,
'u_scale_b': Uniform1f,
'u_pixel_coord_upper': Uniform2f,
'u_pixel_coord_lower': Uniform2f,
'u_tile_units_to_pixels': Uniform1f
|};
export type PatternUniformsType = {|
// pattern uniforms:
'u_image': Uniform1i,
'u_texsize': Uniform2f,
'u_scale': Uniform3f,
'u_fade': Uniform1f,
'u_pixel_coord_upper': Uniform2f,
'u_pixel_coord_lower': Uniform2f
|};
function patternUniformValues(crossfade: CrossfadeParameters, painter: Painter,
tile: Tile
): UniformValues<PatternUniformsType> {
const tileRatio = 1 / pixelsToTileUnits(tile, 1, painter.transform.tileZoom);
const numTiles = Math.pow(2, tile.tileID.overscaledZ);
const tileSizeAtNearestZoom = tile.tileSize * Math.pow(2, painter.transform.tileZoom) / numTiles;
const pixelX = tileSizeAtNearestZoom * (tile.tileID.canonical.x + tile.tileID.wrap * numTiles);
const pixelY = tileSizeAtNearestZoom * tile.tileID.canonical.y;
return {
'u_image': 0,
'u_texsize': tile.imageAtlasTexture.size,
'u_scale': [tileRatio, crossfade.fromScale, crossfade.toScale],
'u_fade': crossfade.t,
// split the pixel coord into two pairs of 16 bit numbers. The glsl spec only guarantees 16 bits of precision.
'u_pixel_coord_upper': [pixelX >> 16, pixelY >> 16],
'u_pixel_coord_lower': [pixelX & 0xFFFF, pixelY & 0xFFFF]
};
}
function bgPatternUniformValues(image: CrossFaded<ResolvedImage>, crossfade: CrossfadeParameters, painter: Painter,
tile: {tileID: OverscaledTileID, tileSize: number}
): UniformValues<BackgroundPatternUniformsType> {
const imagePosA = painter.imageManager.getPattern(image.from.toString());
const imagePosB = painter.imageManager.getPattern(image.to.toString());
assert(imagePosA && imagePosB);
const {width, height} = painter.imageManager.getPixelSize();
const numTiles = Math.pow(2, tile.tileID.overscaledZ);
const tileSizeAtNearestZoom = tile.tileSize * Math.pow(2, painter.transform.tileZoom) / numTiles;
const pixelX = tileSizeAtNearestZoom * (tile.tileID.canonical.x + tile.tileID.wrap * numTiles);
const pixelY = tileSizeAtNearestZoom * tile.tileID.canonical.y;
return {
'u_image': 0,
'u_pattern_tl_a': (imagePosA: any).tl,
'u_pattern_br_a': (imagePosA: any).br,
'u_pattern_tl_b': (imagePosB: any).tl,
'u_pattern_br_b': (imagePosB: any).br,
'u_texsize': [width, height],
'u_mix': crossfade.t,
'u_pattern_size_a': (imagePosA: any).displaySize,
'u_pattern_size_b': (imagePosB: any).displaySize,
'u_scale_a': crossfade.fromScale,
'u_scale_b': crossfade.toScale,
'u_tile_units_to_pixels': 1 / pixelsToTileUnits(tile, 1, painter.transform.tileZoom),
// split the pixel coord into two pairs of 16 bit numbers. The glsl spec only guarantees 16 bits of precision.
'u_pixel_coord_upper': [pixelX >> 16, pixelY >> 16],
'u_pixel_coord_lower': [pixelX & 0xFFFF, pixelY & 0xFFFF]
};
}
export {bgPatternUniformValues, patternUniformValues};
|