add bool uniform support

src/extensions/alpha-orbitals/gpu/compute.ts

@@ -32,7 +32,7 @@ const AlphaOrbitalsSchema = {
     uNAlpha: UniformSpec('i'),
     uNCoeff: UniformSpec('i'),
     uMaxCoeffs: UniformSpec('i'),
-    uLittleEndian: UniformSpec('i') // TODO: boolean uniforms
+    uLittleEndian: UniformSpec('b')
 };
 const AlphaOrbitalsShaderCode = ShaderCode('postprocessing', quad_vert, shader_frag);
 type AlphaOrbitalsRenderable = ComputeRenderable<Values<typeof AlphaOrbitalsSchema>>

src/extensions/alpha-orbitals/gpu/shader.frag.ts

@@ -28,7 +28,7 @@ uniform float uWidth;
 uniform int uNCoeff;
 uniform int uNAlpha;
 
-uniform int uLittleEndian;
+uniform bool uLittleEndian;
 
 float shiftRight (float v, float amt) {
   v = floor(v) + 0.5;
@@ -61,7 +61,7 @@ vec4 floatToRgba(float texelFloat) {
     float byte2 = (last_bit_of_biased_exponent * 128.0 + extractBits(fraction, 16.0, 23.0)) / 255.0;
     float byte1 = (sign * 128.0 + remaining_bits_of_biased_exponent) / 255.0;
     return (
-      uLittleEndian > 0
+        uLittleEndian
             ? vec4(byte4, byte3, byte2, byte1)
             : vec4(byte1, byte2, byte3, byte4)
     );

src/mol-gl/renderable/schema.ts

@@ -129,7 +129,7 @@ export const GlobalUniformSchema = {
     uFogFar: UniformSpec('f'),
     uFogColor: UniformSpec('v3'),
 
-    uTransparentBackground: UniformSpec('i'),
+    uTransparentBackground: UniformSpec('b'),
 
     uClipObjectType: UniformSpec('i[]'),
     uClipObjectPosition: UniformSpec('v3[]'),
@@ -149,7 +149,7 @@ export const GlobalUniformSchema = {
     uPickingAlphaThreshold: UniformSpec('f'),
 
     uInteriorDarkening: UniformSpec('f'),
-    uInteriorColorFlag: UniformSpec('i'),
+    uInteriorColorFlag: UniformSpec('b'),
     uInteriorColor: UniformSpec('v3'),
 
     uHighlightColor: UniformSpec('v3'),

src/mol-gl/renderer.ts

@@ -203,7 +203,7 @@ namespace Renderer {
             uFogNear: ValueCell.create(1),
             uFogFar: ValueCell.create(10000),
             uFogColor: ValueCell.create(bgColor),
-            uTransparentBackground: ValueCell.create(0),
+            uTransparentBackground: ValueCell.create(false),
 
             uClipObjectType: ValueCell.create(clip.objects.type),
             uClipObjectPosition: ValueCell.create(clip.objects.position),
@@ -221,7 +221,7 @@ namespace Renderer {
             uPickingAlphaThreshold: ValueCell.create(p.pickingAlphaThreshold),
 
             uInteriorDarkening: ValueCell.create(p.interiorDarkening),
-            uInteriorColorFlag: ValueCell.create(p.interiorColorFlag ? 1 : 0),
+            uInteriorColorFlag: ValueCell.create(p.interiorColorFlag),
             uInteriorColor: ValueCell.create(Color.toVec3Normalized(Vec3(), p.interiorColor)),
 
             uHighlightColor: ValueCell.create(Color.toVec3Normalized(Vec3(), p.highlightColor)),
@@ -322,7 +322,7 @@ namespace Renderer {
             ValueCell.update(globalUniforms.uFogFar, camera.fogFar);
             ValueCell.update(globalUniforms.uFogNear, camera.fogNear);
 
-            ValueCell.update(globalUniforms.uTransparentBackground, transparentBackground ? 1 : 0);
+            ValueCell.update(globalUniforms.uTransparentBackground, transparentBackground);
 
             globalUniformsNeedUpdate = true;
             state.currentRenderItemId = -1;
@@ -409,7 +409,7 @@ namespace Renderer {
                 }
                 if (props.interiorColorFlag !== undefined && props.interiorColorFlag !== p.interiorColorFlag) {
                     p.interiorColorFlag = props.interiorColorFlag;
-                    ValueCell.update(globalUniforms.uInteriorColorFlag, p.interiorColorFlag ? 1 : 0);
+                    ValueCell.update(globalUniforms.uInteriorColorFlag, p.interiorColorFlag);
                 }
                 if (props.interiorColor !== undefined && props.interiorColor !== p.interiorColor) {
                     p.interiorColor = props.interiorColor;

src/mol-gl/shader/chunks/apply-fog.glsl.ts

@@ -2,7 +2,7 @@ export default `
 float fogDepth = length(vViewPosition);
 float fogFactor = smoothstep(uFogNear, uFogFar, fogDepth);
 float fogAlpha = (1.0 - fogFactor) * gl_FragColor.a;
-if (uTransparentBackground == 0) {
+if (!uTransparentBackground) {
     gl_FragColor.rgb = mix(gl_FragColor.rgb, uFogColor, fogFactor);
     if (gl_FragColor.a < 1.0)
         gl_FragColor.a = fogAlpha;

src/mol-gl/shader/chunks/apply-interior-color.glsl.ts

 export default `
 if (interior) {
-    if (uInteriorColorFlag == 1) {
+    if (uInteriorColorFlag) {
         gl_FragColor.rgb = uInteriorColor;
     } else {
         gl_FragColor.rgb *= 1.0 - uInteriorDarkening;

src/mol-gl/shader/chunks/common-frag-params.glsl.ts

@@ -37,10 +37,10 @@ uniform vec3 uFogColor;
 
 uniform float uAlpha;
 uniform float uPickingAlphaThreshold;
-uniform int uTransparentBackground;
+uniform bool uTransparentBackground;
 
 uniform float uInteriorDarkening;
-uniform int uInteriorColorFlag;
+uniform bool uInteriorColorFlag;
 uniform vec3 uInteriorColor;
 bool interior;
 `;
\ No newline at end of file

src/mol-gl/shader/direct-volume.frag.ts

@@ -51,10 +51,10 @@ uniform vec3 uFogColor;
 
 uniform float uAlpha;
 uniform float uPickingAlphaThreshold;
-uniform int uTransparentBackground;
+uniform bool uTransparentBackground;
 
 uniform float uInteriorDarkening;
-uniform int uInteriorColorFlag;
+uniform bool uInteriorColorFlag;
 uniform vec3 uInteriorColor;
 bool interior;
 

src/mol-gl/webgl/uniform.ts

@@ -11,6 +11,7 @@ import { RenderableSchema } from '../../mol-gl/renderable/schema';
 import { ValueOf } from '../../mol-util/type-helpers';
 
 export type UniformKindValue = {
+    'b': boolean; 'b[]': boolean[]
     'f': number; 'f[]': number[]
     'i': number; 'i[]': number[]
     'v2': Vec2; 'v2[]': number[]
@@ -28,6 +29,7 @@ export type UniformsList = [string, ValueCell<UniformType>][]
 
 export function getUniformType(gl: GLRenderingContext, kind: UniformKind) {
     switch (kind) {
+        case 'b': case 'b[]': return gl.BOOL;
         case 'f': case 'f[]': return gl.FLOAT;
         case 'i': case 'i[]': return gl.INT;
         case 'v2': case 'v2[]': return gl.FLOAT_VEC2;
@@ -56,8 +58,8 @@ function getUniformSetter(kind: UniformKind): UniformSetter {
     switch (kind) {
         case 'f': return uniform1f;
         case 'f[]': return uniform1fv;
-        case 'i': case 't': return uniform1i;
-        case 'i[]': case 't[]': return uniform1iv;
+        case 'i': case 't': case 'b': return uniform1i;
+        case 'i[]': case 't[]': case 'b[]': return uniform1iv;
         case 'v2': case 'v2[]': return uniform2fv;
         case 'v3': case 'v3[]': return uniform3fv;
         case 'v4': case 'v4[]': return uniform4fv;

src/mol-util/is-little-endian.ts

@@ -10,6 +10,5 @@ export function isLittleEndian() {
     const uint16array = new Uint16Array(arrayBuffer);
     uint8Array[0] = 0xAA;
     uint8Array[1] = 0xBB;
-    if (uint16array[0] === 0xBBAA) return 1;
-    return 0;
+    return uint16array[0] === 0xBBAA;
 }
\ No newline at end of file