Function updateForTextures

docs/app/js/sanddance-app.js:77859–77908

(_ref)

var SIZE_UNIFORM_PREFIX = "transform_uSize_";
var VS_POS_VARIABLE = "transform_position";
function updateForTextures(_ref) {
    var vs = _ref.vs, sourceTextureMap = _ref.sourceTextureMap, targetTextureVarying = _ref.targetTextureVarying, targetTexture = _ref.targetTexture;
    var texAttributeNames = Object.keys(sourceTextureMap);
    var sourceCount = texAttributeNames.length;
    var targetTextureType = null;
    var samplerTextureMap = {};
    var updatedVs = vs;
    var finalInject = {};
    if (sourceCount > 0 || targetTextureVarying) {
        var vsLines = updatedVs.split("\n");
        var updateVsLines = vsLines.slice();
        vsLines.forEach(function(line, index, lines) {
            if (sourceCount > 0) {
                var updated = processAttributeDefinition(line, sourceTextureMap);
                if (updated) {
                    var updatedLine = updated.updatedLine, inject = updated.inject;
                    updateVsLines[index] = updatedLine;
                    finalInject = (0, _shadertools.combineInjects)([
                        finalInject,
                        inject
                    ]);
                    Object.assign(samplerTextureMap, updated.samplerTextureMap);
                    sourceCount--;
                }
            }
            if (targetTextureVarying && !targetTextureType) targetTextureType = getVaryingType(line, targetTextureVarying);
        });
        if (targetTextureVarying) {
            (0, _webgl.assert)(targetTexture);
            var sizeName = "".concat(SIZE_UNIFORM_PREFIX).concat(targetTextureVarying);
            var uniformDeclaration = "uniform vec2 ".concat(sizeName, ";\n");
            var posInstructions = "     vec2 ".concat(VS_POS_VARIABLE, " = transform_getPos(").concat(sizeName, ");\n     gl_Position = vec4(").concat(VS_POS_VARIABLE, ", 0, 1.);\n");
            var inject1 = {
                "vs:#decl": uniformDeclaration,
                "vs:#main-start": posInstructions
            };
            finalInject = (0, _shadertools.combineInjects)([
                finalInject,
                inject1
            ]);
        }
        updatedVs = updateVsLines.join("\n");
    }
    return {
        vs: updatedVs,
        targetTextureType: targetTextureType,
        inject: finalInject,
        samplerTextureMap: samplerTextureMap
    };
}
function getSizeUniforms(_ref2) {
    var sourceTextureMap = _ref2.sourceTextureMap, targetTextureVarying = _ref2.targetTextureVarying, targetTexture = _ref2.targetTexture;
    var uniforms = {};