mapbox-gl
Version:
A WebGL interactive maps library
282 lines (255 loc) • 10.8 kB
JavaScript
// Disable Flow annotations here because Flow doesn't support importing GLSL files
/* eslint-disable flowtype/require-valid-file-annotation */
import preludeCommon from './_prelude.glsl';
import preludeFrag from './_prelude.fragment.glsl';
import preludeVert from './_prelude.vertex.glsl';
import backgroundFrag from './background.fragment.glsl';
import backgroundVert from './background.vertex.glsl';
import backgroundPatternFrag from './background_pattern.fragment.glsl';
import backgroundPatternVert from './background_pattern.vertex.glsl';
import circleFrag from './circle.fragment.glsl';
import circleVert from './circle.vertex.glsl';
import clippingMaskFrag from './clipping_mask.fragment.glsl';
import clippingMaskVert from './clipping_mask.vertex.glsl';
import heatmapFrag from './heatmap.fragment.glsl';
import heatmapVert from './heatmap.vertex.glsl';
import heatmapTextureFrag from './heatmap_texture.fragment.glsl';
import heatmapTextureVert from './heatmap_texture.vertex.glsl';
import collisionBoxFrag from './collision_box.fragment.glsl';
import collisionBoxVert from './collision_box.vertex.glsl';
import collisionCircleFrag from './collision_circle.fragment.glsl';
import collisionCircleVert from './collision_circle.vertex.glsl';
import debugFrag from './debug.fragment.glsl';
import debugVert from './debug.vertex.glsl';
import fillFrag from './fill.fragment.glsl';
import fillVert from './fill.vertex.glsl';
import fillOutlineFrag from './fill_outline.fragment.glsl';
import fillOutlineVert from './fill_outline.vertex.glsl';
import fillOutlinePatternFrag from './fill_outline_pattern.fragment.glsl';
import fillOutlinePatternVert from './fill_outline_pattern.vertex.glsl';
import fillPatternFrag from './fill_pattern.fragment.glsl';
import fillPatternVert from './fill_pattern.vertex.glsl';
import fillExtrusionFrag from './fill_extrusion.fragment.glsl';
import fillExtrusionVert from './fill_extrusion.vertex.glsl';
import fillExtrusionPatternFrag from './fill_extrusion_pattern.fragment.glsl';
import fillExtrusionPatternVert from './fill_extrusion_pattern.vertex.glsl';
import hillshadePrepareFrag from './hillshade_prepare.fragment.glsl';
import hillshadePrepareVert from './hillshade_prepare.vertex.glsl';
import hillshadeFrag from './hillshade.fragment.glsl';
import hillshadeVert from './hillshade.vertex.glsl';
import lineFrag from './line.fragment.glsl';
import lineVert from './line.vertex.glsl';
import linePatternFrag from './line_pattern.fragment.glsl';
import linePatternVert from './line_pattern.vertex.glsl';
import rasterFrag from './raster.fragment.glsl';
import rasterVert from './raster.vertex.glsl';
import symbolIconFrag from './symbol_icon.fragment.glsl';
import symbolIconVert from './symbol_icon.vertex.glsl';
import symbolSDFFrag from './symbol_sdf.fragment.glsl';
import symbolSDFVert from './symbol_sdf.vertex.glsl';
import symbolTextAndIconFrag from './symbol_text_and_icon.fragment.glsl';
import symbolTextAndIconVert from './symbol_text_and_icon.vertex.glsl';
import skyboxFrag from './skybox.fragment.glsl';
import skyboxGradientFrag from './skybox_gradient.fragment.glsl';
import skyboxVert from './skybox.vertex.glsl';
import terrainRasterFrag from './terrain_raster.fragment.glsl';
import terrainRasterVert from './terrain_raster.vertex.glsl';
import terrainDepthFrag from './terrain_depth.fragment.glsl';
import terrainDepthVert from './terrain_depth.vertex.glsl';
import preludeTerrainVert from './_prelude_terrain.vertex.glsl';
import preludeFogVert from './_prelude_fog.vertex.glsl';
import preludeFogFrag from './_prelude_fog.fragment.glsl';
import skyboxCaptureFrag from './skybox_capture.fragment.glsl';
import skyboxCaptureVert from './skybox_capture.vertex.glsl';
import globeFrag from './globe_raster.fragment.glsl';
import globeVert from './globe_raster.vertex.glsl';
import atmosphereFrag from './atmosphere.fragment.glsl';
import atmosphereVert from './atmosphere.vertex.glsl';
export let preludeTerrain = {};
export let preludeFog = {};
const commonDefines = [];
parseUsedPreprocessorDefines(preludeCommon, commonDefines);
parseUsedPreprocessorDefines(preludeTerrainVert, commonDefines);
parseUsedPreprocessorDefines(preludeFogVert, commonDefines);
parseUsedPreprocessorDefines(preludeFogFrag, commonDefines);
preludeTerrain = compile('', preludeTerrainVert);
preludeFog = compile(preludeFogFrag, preludeFogVert);
// Shadow prelude is not compiled until GL-JS implements shadows
export const prelude = compile(preludeFrag, preludeVert);
export const preludeCommonSource = preludeCommon;
export const preludeVertPrecisionQualifiers = `
#ifdef GL_ES
precision highp float;
#else
#if !defined(lowp)
#define lowp
#endif
#if !defined(mediump)
#define mediump
#endif
#if !defined(highp)
#define highp
#endif
#endif`;
export const preludeFragPrecisionQualifiers = `
#ifdef GL_ES
precision mediump float;
#else
#if !defined(lowp)
#define lowp
#endif
#if !defined(mediump)
#define mediump
#endif
#if !defined(highp)
#define highp
#endif
#endif`;
export const standardDerivativesExt = '#extension GL_OES_standard_derivatives : enable\n';
export default {
background: compile(backgroundFrag, backgroundVert),
backgroundPattern: compile(backgroundPatternFrag, backgroundPatternVert),
circle: compile(circleFrag, circleVert),
clippingMask: compile(clippingMaskFrag, clippingMaskVert),
heatmap: compile(heatmapFrag, heatmapVert),
heatmapTexture: compile(heatmapTextureFrag, heatmapTextureVert),
collisionBox: compile(collisionBoxFrag, collisionBoxVert),
collisionCircle: compile(collisionCircleFrag, collisionCircleVert),
debug: compile(debugFrag, debugVert),
fill: compile(fillFrag, fillVert),
fillOutline: compile(fillOutlineFrag, fillOutlineVert),
fillOutlinePattern: compile(fillOutlinePatternFrag, fillOutlinePatternVert),
fillPattern: compile(fillPatternFrag, fillPatternVert),
fillExtrusion: compile(fillExtrusionFrag, fillExtrusionVert),
fillExtrusionPattern: compile(fillExtrusionPatternFrag, fillExtrusionPatternVert),
hillshadePrepare: compile(hillshadePrepareFrag, hillshadePrepareVert),
hillshade: compile(hillshadeFrag, hillshadeVert),
line: compile(lineFrag, lineVert),
linePattern: compile(linePatternFrag, linePatternVert),
raster: compile(rasterFrag, rasterVert),
symbolIcon: compile(symbolIconFrag, symbolIconVert),
symbolSDF: compile(symbolSDFFrag, symbolSDFVert),
symbolTextAndIcon: compile(symbolTextAndIconFrag, symbolTextAndIconVert),
terrainRaster: compile(terrainRasterFrag, terrainRasterVert),
terrainDepth: compile(terrainDepthFrag, terrainDepthVert),
skybox: compile(skyboxFrag, skyboxVert),
skyboxGradient: compile(skyboxGradientFrag, skyboxVert),
skyboxCapture: compile(skyboxCaptureFrag, skyboxCaptureVert),
globeRaster: compile(globeFrag, globeVert),
globeAtmosphere: compile(atmosphereFrag, atmosphereVert)
};
export function parseUsedPreprocessorDefines(source, defines) {
const lines = source.replace(/\s*\/\/[^\n]*\n/g, '\n').split('\n');
for (let line of lines) {
line = line.trim();
if (line[0] === '#') {
if (line.includes('if') && !line.includes('endif')) {
line = line.replace('#', '')
.replace(/ifdef|ifndef|elif|if/g, '')
.replace(/!|defined|\(|\)|\|\||&&/g, '')
.replace(/\s+/g, ' ').trim();
const newDefines = line.split(' ');
for (const define of newDefines) {
if (!defines.includes(define)) {
defines.push(define);
}
}
}
}
}
}
// Expand #pragmas to #ifdefs.
export function compile(fragmentSource, vertexSource) {
const pragmaRegex = /#pragma mapbox: ([\w]+) ([\w]+) ([\w]+) ([\w]+)/g;
const attributeRegex = /attribute (highp |mediump |lowp )?([\w]+) ([\w]+)/g;
const staticAttributes = vertexSource.match(attributeRegex);
const fragmentPragmas = {};
const usedDefines = [...commonDefines];
parseUsedPreprocessorDefines(fragmentSource, usedDefines);
parseUsedPreprocessorDefines(vertexSource, usedDefines);
fragmentSource = fragmentSource.replace(pragmaRegex, (match, operation, precision, type, name) => {
fragmentPragmas[name] = true;
if (operation === 'define') {
return `
#ifndef HAS_UNIFORM_u_${name}
varying ${precision} ${type} ${name};
#else
uniform ${precision} ${type} u_${name};
#endif
`;
} else /* if (operation === 'initialize') */ {
return `
#ifdef HAS_UNIFORM_u_${name}
${precision} ${type} ${name} = u_${name};
#endif
`;
}
});
vertexSource = vertexSource.replace(pragmaRegex, (match, operation, precision, type, name) => {
const attrType = type === 'float' ? 'vec2' : 'vec4';
const unpackType = name.match(/color/) ? 'color' : attrType;
if (fragmentPragmas[name]) {
if (operation === 'define') {
return `
#ifndef HAS_UNIFORM_u_${name}
uniform lowp float u_${name}_t;
attribute ${precision} ${attrType} a_${name};
varying ${precision} ${type} ${name};
#else
uniform ${precision} ${type} u_${name};
#endif
`;
} else /* if (operation === 'initialize') */ {
if (unpackType === 'vec4') {
// vec4 attributes are only used for cross-faded properties, and are not packed
return `
#ifndef HAS_UNIFORM_u_${name}
${name} = a_${name};
#else
${precision} ${type} ${name} = u_${name};
#endif
`;
} else {
return `
#ifndef HAS_UNIFORM_u_${name}
${name} = unpack_mix_${unpackType}(a_${name}, u_${name}_t);
#else
${precision} ${type} ${name} = u_${name};
#endif
`;
}
}
} else {
if (operation === 'define') {
return `
#ifndef HAS_UNIFORM_u_${name}
uniform lowp float u_${name}_t;
attribute ${precision} ${attrType} a_${name};
#else
uniform ${precision} ${type} u_${name};
#endif
`;
} else /* if (operation === 'initialize') */ {
if (unpackType === 'vec4') {
// vec4 attributes are only used for cross-faded properties, and are not packed
return `
#ifndef HAS_UNIFORM_u_${name}
${precision} ${type} ${name} = a_${name};
#else
${precision} ${type} ${name} = u_${name};
#endif
`;
} else /* */{
return `
#ifndef HAS_UNIFORM_u_${name}
${precision} ${type} ${name} = unpack_mix_${unpackType}(a_${name}, u_${name}_t);
#else
${precision} ${type} ${name} = u_${name};
#endif
`;
}
}
}
});
return {fragmentSource, vertexSource, staticAttributes, usedDefines};
}